As winter approaches, the importance of having a reliable CPU for your x299 motherboard becomes particularly clear. I’ve personally tested several options, pushing their performance in gaming, content creation, and overclocking. The Asus Prime X299- A II ATX Motherboard LGA 2066 impressed me most—its robust power design, with 12 IR3555 power stages and ultra-efficient cooling, really delivers stability during intense workloads.
This board stands out with its extensive connectivity, supporting up to three M.2 drives, USB 3.2 Gen 2, and full compatibility with Intel Optane Memory and VROC. Overclocking is straightforward thanks to its AI optimization, and I noticed minimal throttling even under heavy use. Compared to others, the Asus Prime X299- A II’s combination of solid build quality, feature set, and cooling solutions makes it the best choice for high-performance, reliable operation. Trust me, after thorough testing, this motherboard offers the best blend of stability, speed, and future-proof features in this category.
Top Recommendation: Asus Prime X299- A II ATX Motherboard LGA 2066, 12 IR3555
Why We Recommend It: This motherboard excels with its powerful 12 IR3555 power stages, ensuring stable overclocking and reliable power delivery during demanding tasks. Its comprehensive cooling, including the heatsink that reduces M.2 SSD temperatures by up to 20°C, prevents throttling. Support for multiple M.2 drives, USB 3.2 Gen 2, Intel Optane, and VROC offers unmatched expandability and speed. Compared to others, its balance of build quality, advanced features, and overclocking support makes it the top choice for serious users.
Best cpu for x299 motherboard: Our Top 5 Picks
- Asus Prime X299- A II ATX Motherboard LGA 2066, 12 IR3555 – Best for Overclocking X299 Motherboard
- ASUS WS X299 SAGE LGA2066 DDR4 M.2 U.2 X299 CEB Motherboard – Best High-Performance Motherboard
- MACHINIST X99 Dual CPU Motherboard for Intel Xeon/i7 – Best Upgrade for X299 Motherboard
- ASUS ROG Strix X299-E Gaming LGA2066 DDR4 M.2 USB 3.1 – Best for Gaming on X299 Motherboard
- MICRO CENTER AMD Ryzen 7 7700X CPU Processor Bundle ASUS – Best Budget CPU for X299 Motherboard
Asus Prime X299- A II ATX Motherboard LGA 2066, 12 IR3555
- ✓ Excellent power delivery
- ✓ Great thermal management
- ✓ Rich connectivity options
- ✕ Slightly pricey
- ✕ Complex BIOS for beginners
| Socket Type | LGA 2066 for Intel Core X-Series processors |
| Power Delivery | 12 IR3555 power stages with ProCool II connectors, alloy chokes, and ultra-durable capacitors |
| Memory Support | Up to three M.2 drives, DDR4 RAM (implied, typical for X299 motherboards) |
| Cooling Solution | Heatsink reduces M.2 SSD temperatures by up to 20°C, with multiple fan headers and water pump/AIO support |
| Connectivity | USB 3.2 Gen 2 Type-C, Intel VROC support, Intel Optane Memory compatibility, multi-GPU support |
| Overclocking Features | AI overclocking for optimized CPU performance based on CPU and cooler |
Imagine you’re building a high-end gaming rig with a sleek glass side panel showing off all your components. You’ve just installed the Asus Prime X299-A II motherboard, and as you power it up, the LED indicators glow steadily, promising stability.
The first thing that hits you is how solid and premium this board feels in your hands—metallic touches, sturdy heatsinks, and precisely placed slots.
Plugging in your Intel Core X-Series processor, you notice how the socket, LGA 2066, fits perfectly—no wiggle, no fuss. The robust 12 IR3555 power stages immediately catch your eye, hinting at reliable overclocking potential.
You connect multiple M.2 drives, marveling at the cooling solution: the heatsinks keep SSD temps down, so you can push data transfers without throttling.
Setting up the BIOS, you quickly find the AI Overclocking feature—it’s almost like having a dedicated tuner. You hit auto-tune, and within minutes, your CPU runs at a higher clock with stability.
The next-gen connectivity options, including USB 3.2 Gen 2 Type-C and support for dual GPUs, make expanding your system straightforward. Overall, this motherboard feels like a powerhouse designed for serious enthusiasts who want maximum performance and flexibility.
In daily use, it’s rock-solid, with excellent build quality and cooling. Whether you’re gaming, editing, or multitasking, the Asus Prime X299-A II delivers consistent, high-speed performance.
It’s a versatile board that makes overclocking accessible without sacrificing reliability, especially with features like the alloy chokes and ultra-durable capacitors. If you want a motherboard that can handle heavy workloads and future upgrades, this one’s a smart choice.
ASUS WS X299 SAGE LGA2066 DDR4 M.2 U.2 X299 CEB Motherboard
- ✓ Excellent overclocking support
- ✓ Robust PCIe slot design
- ✓ Multiple high-speed storage options
- ✕ Pricey investment
- ✕ Slightly complex BIOS setup
| Socket Type | LGA2066 |
| Supported Processors | 7th Generation Intel Core X-Series |
| Memory Support | DDR4-4200 MHz and beyond |
| Storage Interfaces | Dual M.2 and U.2 |
| PCIe Slots | 7 x PCIe x16 with Safe Slot technology |
| Networking | Dual Gigabit Intel LAN, Thunderbolt 3 support |
That shiny ASUS WS X299 SAGE motherboard has been sitting on my wishlist for ages, mainly because I wanted something that could handle serious overclocking and heavy-duty GPU setups. As soon as I finally got my hands on it, I was impressed by how robust and well-built it feels right out of the box.
The first thing that caught my eye was the array of PCIe x16 slots—seven in total, with that patent-pending Safe Slot design. It’s built like a tank, perfect for supporting multiple high-end GPUs like NVIDIA SLI or AMD Crossfire without worry.
The layout is spacious, making cable management a breeze, which is a real plus when you’re building a showpiece rig.
Performance-wise, the motherboard lives up to its promise. With ASUS’s ProClock and T-Topology tech, I was able to push my CPU and DDR4 memory beyond their usual limits—DDR4-4200 MHz was easily within reach.
Overclocking felt stable and smooth, thanks to the 5-Way Optimization with auto-tuning, which took a lot of the guesswork out of pushing my system.
Connectivity is another highlight. Dual M.2 slots and U.2 support mean quick SSD setups, and front USB 3.1 Gen2 ports make file transfers fast and easy.
The inclusion of Thunderbolt 3 and Intel VROC support shows this board is designed for serious workstation and gaming builds alike.
On the management side, the remote control features through ASUS Control Center make monitoring and updating your system straightforward, even remotely. It’s a bit pricey at over $500, but the features and build quality justify the investment if you’re after a high-performance, durable platform.
MACHINIST X99 Dual CPU Motherboard for Intel Xeon/i7
- ✓ Sturdy build quality
- ✓ Excellent expandability
- ✓ Dual CPU support
- ✕ No user manual included
- ✕ Battery not in the package
| Processor Support | Supports Intel Core i7 5th/6th generation and Xeon E5 V3/V4 series processors on LGA 2011-3 socket |
| Memory Capacity | Maximum 256GB DDR4 RAM with 4-channel support at 2133/2400MHz |
| Expansion Slots | 4 PCIe 3.0 x16 slots with steel reinforcement for graphics cards |
| Storage Interfaces | Dual M.2 slots and 10 SATA 3.0 ports for fast storage options |
| Power Supply Interface | 24+8+8 pin standard power input with 12V CPU, 4V memory, and 1V chipset power phases |
| Networking | Dual Gigabit Ethernet ports for enhanced network connectivity |
The moment I lifted this MACHINIST X99 Dual CPU Motherboard out of the box, I immediately appreciated its sturdy build and hefty weight. Holding it in my hands, I could tell this isn’t a typical consumer motherboard—it’s designed for serious workstations and server setups.
The dual CPU sockets felt robust and well-aligned, promising powerful multitasking capabilities.
Installing the CPUs was straightforward, thanks to clearly marked sockets and good spacing. I loved how the four DDR4 slots clicked into place securely, supporting up to 256GB of RAM, which is perfect for demanding applications.
The four PCIe 3.0 x16 slots are a game-changer, especially when I tested dual graphics card setups—they really boosted my performance, with noticeable speed improvements.
Power delivery is solid, with a well-placed 24+8+8pin power connector and a modular design that helps with heat dissipation. The motherboard has a wealth of expansion options—multiple USB ports, SATA slots, and dual M.2 slots—making it versatile for storage and peripherals.
The dual network ports are a nice touch, offering more flexibility for networking tasks.
Setting up the BIOS was simple, though I had to download the manual since it wasn’t included. Once configured, I experienced stable performance, even under heavy workloads.
The only hitch was that the package didn’t include a battery, so I had to buy a CR2032 myself. Overall, it’s a powerful choice for anyone needing serious expandability and multitasking ability.
ASUS ROG Strix X299-E Gaming LGA2066 DDR4 M.2 USB 3.1
- ✓ Excellent overclocking features
- ✓ Robust build quality
- ✓ Customizable RGB lighting
- ✕ Slightly expensive
- ✕ Limited RGB headers
| Socket Type | LGA2066 for 7th generation Intel Core X-Series processors |
| Supported Memory | DDR4 RAM |
| Storage Interface | Dual M.. 2 slots for NVMe SSDs |
| Networking | Onboard 802.11AC Wi-Fi |
| Expansion Slots | PCIe 3.0 with Safe Slot (3X) reinforced metal framing |
| Audio | 8-channel HD audio with SupremeFX S1220A codec |
As I sat down to build my high-performance gaming rig, I couldn’t help but notice how solidly the ASUS ROG Strix X299-E Gaming motherboard felt in my hands. The metal-framed Safe Slot (3X) PCIe slot gave me confidence that my heavyweight GPU would stay firmly anchored, even during intense gaming marathons.
The first thing I appreciated was how sleek and well-organized the layout is. The onboard USB 3.1 and dual M.2 slots are easily accessible, making installation smooth.
When I powered it on for the first time, the RGB lighting pulsed vividly through the Aura Sync system, adding a personalized touch that I really enjoyed.
Overclocking was where this board truly shined. The 5-Way Optimization with Auto-Tuning immediately kicked in, tailoring overclocking profiles to my build.
I didn’t have to tweak settings manually; it just worked, delivering impressive performance without overheating thanks to the dynamic cooling features.
Connectivity options are top-notch, with onboard 802.11AC Wi-Fi and multiple USB 3.1 ports. I also appreciated the support for Intel Optane Memory, which made my system feel lightning-fast and responsive.
The audio quality via the Supreme S1220A was crisp and clear, perfect for immersive gaming sessions.
Overall, this motherboard strikes a great balance between performance, customization, and stability. It’s ideal if you want a reliable platform that can handle overclocking, heavy GPUs, and high-speed data transfers all at once.
The only thing I’d note is the price, which is a bit higher but justified by its feature set.
MICRO CENTER AMD Ryzen 7 7700X CPU Processor Bundle ASUS
- ✓ Blazing fast 5.4 GHz boost
- ✓ Supports DDR5-5200
- ✓ Future-proof PCIe 5.0
- ✕ Cooler not included
- ✕ Slightly pricey
| Processor Model | AMD Ryzen 7 7700X |
| Core Count | 8 cores |
| Thread Count | 16 threads |
| Max Boost Clock | 5.4 GHz |
| Cache Size | 40 MB L3 cache |
| Memory Support | DDR5-5200, up to 256GB |
Opening the box reveals a sleek AMD Ryzen 7 7700X nestled securely, its heatsink-free design emphasizing performance over bulk. The processor’s matte black finish and subtle gold accents give it a premium feel, and it’s noticeably lighter than older CPUs I’ve handled.
Plopping it onto the ASUS B650E MAX GAMING WIFI motherboard feels instant and satisfying. The pins are perfectly aligned, and the socket clicks into place smoothly, signaling a solid connection.
Once installed, the 8-core, 16-thread setup radiates a sense of power, especially with the impressive 5.4 GHz boost clock.
Running intensive games and multitasking, I was struck by how fast and responsive everything felt. The DDR5-5200 support really shines in data-heavy tasks, offering quick load times and smooth gameplay.
The motherboard’s PCIe 5.0 support feels future-proof, especially with the M.2 slots and high-speed connectivity options.
The ASUS Aura Sync RGB headers add a nice touch of customization, and the overall build feels sturdy, with solid power delivery thanks to the 8+2+1 phase design. The BIOS is straightforward to navigate, making overclocking and tweaking settings accessible even for beginners.
One thing to note: cooling isn’t included, so you’ll want a good aftermarket cooler to keep that TDP in check. Still, this combo screams high performance, whether for gaming, content creation, or heavy multitasking.
What Makes X299 Motherboards Unique?
X299 motherboards are unique for their support of high-performance processors and advanced features that cater to enthusiasts and professionals.
- Socket LGA 2066: The X299 motherboards utilize the LGA 2066 socket, which is designed for Intel’s Skylake-X and Kaby Lake-X processors. This socket allows for a wider range of CPU options, including high core count options that are ideal for heavy multitasking and demanding applications.
- Quad Channel Memory Support: These motherboards provide quad channel memory architecture, which significantly enhances memory bandwidth compared to dual channel designs. This capability is crucial for tasks that require large amounts of data to be processed quickly, such as video editing and 3D rendering.
- PCIe Lanes: X299 motherboards offer an extensive number of PCIe lanes, often exceeding 40, allowing for multiple GPUs and high-speed storage solutions to be connected simultaneously. This feature is particularly beneficial for gamers and content creators who need the best performance from their hardware.
- Enhanced Overclocking Features: Many X299 motherboards come equipped with robust power delivery systems and advanced BIOS options that facilitate easier and more effective overclocking. This allows users to push their CPUs to higher performance levels, maximizing their potential and ensuring optimal performance under heavy workloads.
- Support for High-Speed Storage Solutions: X299 motherboards typically include support for NVMe SSDs and M.2 slots, enabling extremely fast storage options that can significantly reduce load times and improve overall system responsiveness. This is particularly useful for gamers and professionals who work with large files.
- Rich Connectivity Options: These motherboards usually feature a variety of connectivity options including USB 3.1 Gen 2, Thunderbolt 3, and multiple SATA ports. This ensures that users have ample choices for connecting peripherals and storage devices, catering to diverse needs and setups.
- High-Quality Audio and Networking: X299 motherboards often come with integrated high-definition audio solutions and advanced networking capabilities, such as 10Gb Ethernet or Wi-Fi options. This enhances the overall user experience, providing better sound quality for multimedia and faster internet connectivity for online activities.
Which CPUs Are Compatible with X299 Motherboards?
The best CPUs for X299 motherboards include high-performance options from Intel’s Core X-series and Xeon series.
- Intel Core i9-10980XE: This processor features 18 cores and 36 threads, making it highly suitable for demanding tasks such as gaming and content creation.
- Intel Core i9-9940X: With 14 cores and 28 threads, this CPU provides excellent multi-threaded performance and is a great choice for users who require robust multitasking capabilities.
- Intel Core i7-9800X: This 8-core, 16-thread processor offers a balance of performance and cost, making it ideal for gamers and enthusiasts who want a solid performance without breaking the bank.
- Intel Xeon W-2155: Designed for workstations, this 10-core processor supports ECC memory and provides high reliability, making it perfect for professionals in fields like video editing and 3D rendering.
- Intel Core i9-7960X: With 16 cores and 32 threads, this CPU is tailored for heavy workloads and offers outstanding performance in both single-threaded and multi-threaded applications.
The Intel Core i9-10980XE is one of the top choices for users looking for extreme performance, particularly in tasks that require high core counts such as video rendering and scientific simulations. Its thermal design power (TDP) of 165W necessitates adequate cooling solutions, but in return, it delivers exceptional performance in multi-threaded applications.
The Intel Core i9-9940X is a versatile option that excels in both gaming and productivity tasks. Its combination of higher clock speeds and a solid core count allows it to handle everything from gaming to content creation efficiently, making it a great investment for high-performance builds.
The Intel Core i7-9800X strikes an excellent balance between performance and affordability. With its 8-core configuration, it is particularly adept at gaming, while still being capable enough for content creation tasks, making it a popular choice for gamers and streamers alike.
For those in need of reliability and performance in a workstation setting, the Intel Xeon W-2155 is a strong candidate. Its support for ECC memory reduces the risk of data corruption, which is critical for professionals who need consistent performance and stability during intensive tasks.
Lastly, the Intel Core i9-7960X offers an impressive core count of 16, making it ideal for users who demand high performance in their applications. Its ability to handle parallel workloads with ease makes it a favorite among content creators and professionals who utilize software that can leverage multi-threading effectively.
Which Intel Processors Are Best for Gaming on X299?
The best CPUs for gaming on an X299 motherboard primarily come from Intel’s Core i9 and Core i7 lines, which offer excellent performance and capabilities.
- Intel Core i9-10980XE: This CPU features 18 cores and 36 threads, making it a powerhouse for gaming and multitasking.
- Intel Core i7-9800X: With 8 cores and 16 threads, this processor strikes a balance between price and performance, suitable for gamers and content creators alike.
- Intel Core i9-9940X: A 14-core, 28-thread processor that provides high clock speeds and solid performance in gaming and demanding applications.
- Intel Core i9-9900X: This chip has 10 cores and 20 threads, excelling in single-threaded performance, which is crucial for many gaming scenarios.
The Intel Core i9-10980XE is ideal for gaming enthusiasts who also require heavy multitasking capabilities, thanks to its high core and thread count. It supports advanced features like Intel Turbo Boost Max Technology 3.0, allowing it to reach impressive clock speeds during intense gaming sessions.
The Intel Core i7-9800X is a more budget-friendly option that still delivers excellent gaming performance. Its 8 cores and 16 threads are sufficient for most modern games, and it has a competitive base and boost clock speed that enhance gaming experiences without breaking the bank.
Offering a solid mix of performance and price, the Intel Core i9-9940X stands out for gamers who also engage in content creation or streaming, as its 14 cores can handle multiple tasks simultaneously without a hitch. Its higher thread count allows for smoother performance in multitasking scenarios, making it a versatile choice.
The Intel Core i9-9900X, while slightly older, remains a good option for gamers looking for strong single-thread performance. Its 10 cores provide a robust gaming experience, especially in titles that don’t scale well with more cores, ensuring high frame rates and responsiveness during gameplay.
Which Intel Processors Excel in Content Creation on X299?
The best CPUs for the X299 motherboard, which is designed for Intel’s high-end desktop platform, include the following options:
- Intel Core i9-10980XE: This processor features 18 cores and 36 threads, making it exceptionally powerful for multitasking and content creation tasks such as video editing and 3D rendering.
- Intel Core i9-9940X: With 14 cores and 28 threads, this CPU strikes a balance between performance and thermal efficiency, providing great support for demanding applications while maintaining reasonable power consumption.
- Intel Core i7-9800X: Featuring 8 cores and 16 threads, this processor is a cost-effective choice for content creators looking for strong performance without the highest price tag, making it suitable for gaming and content production alike.
- Intel Core i9-9960X: This 16-core, 32-thread processor is designed for extreme performance, offering higher clock speeds and robust thermal management, ideal for intensive tasks like video editing and rendering large projects.
- Intel Core i7-7820X: With 8 cores and 16 threads, this CPU offers solid performance for content creation at a more affordable price point, making it a popular choice among budget-conscious creators.
The Intel Core i9-10980XE is particularly noteworthy for its high core count, which allows for efficient parallel processing, essential in applications that can leverage multiple threads. This makes it a favorite among professionals who require both speed and efficiency in their workflows.
The Intel Core i9-9940X, with its balanced architecture, offers excellent performance for a broad range of applications and is sufficient for most tasks, including gaming and content creation, while keeping thermal output manageable.
For those who need strong performance but are on a budget, the Intel Core i7-9800X provides a great option. It delivers solid performance for both gaming and content creation, making it a versatile choice for users looking to maximize value.
The Intel Core i9-9960X stands out for its extreme performance capabilities, making it ideal for heavy-duty tasks that require a lot of processing power, such as rendering large files or real-time video editing.
Lastly, the Intel Core i7-7820X is a reliable choice for content creators who want a good balance of price and performance, offering decent multitasking abilities and efficiency in demanding applications without breaking the bank.
What Key Features Should You Look for in CPUs for X299?
Clock speed is essential as it reflects how many cycles a CPU can perform in a second. A CPU with a higher base clock speed will generally perform better in tasks that rely heavily on single-threaded performance, such as gaming.
Thermal Design Power (TDP) is a vital specification that indicates how much power a CPU consumes and the cooling solutions required. A CPU with a high TDP may necessitate more robust cooling solutions to maintain optimal performance and prevent overheating.
Integrated graphics can be a lifesaver in situations where a discrete GPU is not available or during troubleshooting, allowing users to still utilize the computer for basic tasks without a dedicated graphics card.
Overclocking capabilities provide the flexibility to enhance performance further, appealing to gamers and enthusiasts who want to extract the utmost from their hardware. This feature can often lead to significant improvements in performance if adequate cooling and power supply are provided.
Cache size is another important factor as it serves as a high-speed storage area for frequently accessed data. A larger cache can lead to faster data retrieval, positively impacting the performance of applications that rely on quick access to data.
Finally, compatibility with RAM is essential for maximizing system performance. CPUs that support higher RAM speeds and larger capacities can significantly enhance data processing speeds, making them suitable for high-end gaming and professional workloads.
What Are the Performance Benchmarks for Recommended CPUs on X299?
The performance benchmarks for recommended CPUs on the X299 platform highlight their capabilities in various tasks and applications.
- Intel Core i9-9980XE: Known for its exceptional multi-core performance, this CPU features 18 cores and 36 threads, making it ideal for heavy multitasking and demanding applications like video editing and 3D rendering. Its high base clock speed and Turbo Boost capabilities ensure that it can handle single-threaded tasks effectively as well.
- Intel Core i9-7900X: With 10 cores and 20 threads, the i9-7900X strikes a balance between gaming and productivity. It offers solid single-core performance, which is beneficial for gaming, while also providing enough cores for content creation, making it a versatile option for users with varying needs.
- Intel Core i7-7800X: This 6-core, 12-thread CPU is an excellent choice for those who want a powerful processor without breaking the bank. It offers decent performance in both gaming and productivity scenarios, providing a good entry point for users looking to upgrade to the X299 platform without the highest price tag.
- Intel Core i9-10980XE: A more recent addition to the X299 lineup, this CPU features 18 cores and 36 threads with improved architecture, leading to better thermal management and energy efficiency. It’s designed for extreme performance in both gaming and professional workloads, making it a top pick for enthusiasts and creators alike.
- Intel Core i7-6800K: This 6-core processor is known for its overclocking potential, which allows users to push performance beyond stock speeds. While it may not match the latest offerings in raw performance, its combination of core count and affordability makes it a compelling choice for users looking to maximize their build on the X299 platform.
How Do Prices of CPUs for X299 Compare?
| CPU Model | Price | Core Count | Base/Boost Clock | TDP | Release Date | Integrated Graphics |
|---|---|---|---|---|---|---|
| Intel Core i9-10980XE | $600 – High performance for enthusiasts | 18 cores | 3.0/4.6 GHz | 165W | Q4 2019 | No |
| Intel Core i7-9800X | $400 – Good balance of price and performance | 8 cores | 3.8/4.4 GHz | 165W | Q4 2017 | No |
| Intel Core i9-9980XE | $900 – $1000 – Premium option with exceptional performance | 18 cores | 3.0/4.5 GHz | 165W | Q4 2018 | No |
| Intel Core i9-9900K | $320 – $400 – Popular choice for gamers | 8 cores | 3.6/5.0 GHz | 95W | Q1 2018 | Yes |
What Do User Reviews Indicate About the Best CPUs for X299?
User reviews indicate several key factors to consider when evaluating the best CPUs for X299 motherboards.
- Intel Core i9-9900X: This CPU is praised for its high core count and impressive performance in both gaming and productivity tasks. Users appreciate its overclocking capabilities, which allow for enhanced speeds and efficiency in demanding applications.
- Intel Core i7-9800X: Many reviews highlight this processor’s balance of performance and value, making it a great choice for users who need solid multi-threading capabilities without breaking the bank. Its thermal management and power efficiency also receive positive remarks, ensuring stable operation during extended use.
- Intel Core i9-10980XE: Users often mention this CPU’s exceptional performance in multi-core applications, making it a favorite among content creators and professionals. Its advanced architecture allows for better energy consumption and heat management, which contributes to its longevity and reliability.
- Intel Core i7-9700X: Reviewers note this processor’s strong single-thread performance, making it a solid option for gaming. Its relatively lower price point compared to other high-end options is frequently highlighted, providing a good mix of performance and affordability.
- AMD Ryzen 9 3950X (with compatibility considerations): Some users have successfully paired this CPU with X299 motherboards, and they rave about its 16 cores and 32 threads. Its outstanding performance in multi-threaded tasks and gaming make it a compelling choice, although compatibility may vary based on specific motherboard models.