Question 1

Are there any known compatibility issues between the AMD Threadripper PRO 9985WX and specific workstation motherboards or RAM kits?

Accepted Answer

The AMD Ryzen Threadripper PRO 9985WX requires workstation motherboards with the sTR5 socket and compatible chipset, typically from the WRX80 platform. RAM compatibility mainly depends on ECC Registered DIMMs, which are recommended for stability and performance; standard consumer RAM may not be supported or perform optimally.

Keep in mind that this CPU has a high power draw of 350W, so your motherboard should offer robust power delivery and cooling. Checking the motherboard manufacturer’s QVL (Qualified Vendor List) for memory is a good idea to ensure your ECC memory is fully supported without BIOS updates or quirks.

Question 2

What are the key architectural improvements and performance gains of the AMD Threadripper PRO 9985WX compared to the previous Threadripper PRO 3975WX?

Accepted Answer

Compared to the Threadripper PRO 3975WX, the 9985WX uses the newer 4nm Shimada Peak architecture, offering higher core counts at 64 cores versus 32, and a larger combined cache of 320MB. This means much better multi-threaded performance, especially for heavy computational workloads like 3D rendering or scientific simulations, with a base clock of 3.2 GHz and a 350W TDP for sustained power delivery.

Keep in mind that while the 9985WX ramps up performance significantly, it also consumes more power and requires robust cooling due to its 350W TDP, so good airflow or a liquid cooler is critical. If your workloads don’t fully utilize the higher core count, the older 3975WX might still be more efficient, but for peak performance in professional applications, the 9985WX is a clear step forward.

Question 3

What are the best motherboard and RAM options to pair with the AMD Threadripper PRO 9985WX for optimal performance?

Accepted Answer

The compatible desktop chipsets listed are AMD Pro 695, AMD TRX50, and AMD WRX90. The memory type is DDR5 6400, with 8 memory channels and ECC memory supported.

Question 4

What is the recommended procedure for mounting an optimal cooling solution on the AMD Threadripper PRO 9985WX to ensure maximum thermal efficiency?

Accepted Answer

Because the AMD Ryzen Threadripper PRO 9985WX has a high 350W TDP and uses the sTR5 socket, you’ll want a robust cooling solution designed specifically for Threadripper PRO CPUs, typically a large liquid cooler or a high-end air cooler made to cover its extended heat spreader. Using the right mounting bracket for the sTR5 socket is crucial to ensure proper contact and pressure, which directly impacts thermal performance. Also, note that this CPU doesn’t have integrated graphics, so cooling is focused entirely on the CPU die.

For best results, verify that your cooler supports the sTR5 socket, as many standard Threadripper coolers are for the older TR4 socket and may not fit perfectly. Custom water loops or 280mm+ AIO liquid coolers are common choices to maintain optimal temperatures under heavy workloads. If you’re in a high ambient temperature environment or pushing sustained loads, increasing case airflow and considering thermal paste quality will also make a noticeable difference.

Question 5

Is it worth purchasing the AMD Threadripper PRO 9985WX now, or should I wait for the next generation Threadripper PRO CPUs to launch?

Accepted Answer

If you need serious multi-threaded performance now, the Threadripper PRO 9985WX with its 64 cores and massive 256MB L3 cache is a beast for professional workloads like 3D rendering and simulation. Its 350W TDP means you’ll need robust cooling, but it’s one of the fastest chips available for those demanding applications.

Waiting for the next generation might bring improvements in efficiency or clock speeds, but unless your workload is extremely sensitive to the latest IPC gains, this model delivers tremendous power today. Also, keep in mind there’s no integrated graphics, so pairing it with a capable GPU is essential depending on your use case.

Question 6

How does the multi-threaded and single-threaded performance of the AMD Threadripper PRO 9985WX compare to the Intel Xeon W-3300 series for professional workstation tasks?

Accepted Answer

The AMD Threadripper PRO 9985WX offers outstanding multi-threaded performance thanks to its 64 cores and 128 threads, generally outperforming the Intel Xeon W-3300 series in highly parallel workloads like 3D rendering or scientific simulations. However, its single-threaded performance is more competitive but may be slightly behind some Intel Xeon models that have higher boost clocks or more aggressive turbo behavior.

If your workload relies heavily on single-threaded tasks or specific Intel-optimized software, Xeon W-3300 might have a small edge there. But for raw multi-threaded horsepower and massive cache, the Threadripper PRO 9985WX typically delivers more power, especially in workflows that scale well across many cores. Keep in mind that this CPU doesn’t include integrated graphics, so a discrete GPU is necessary for workstation setups.

Question 7

What operating systems are compatible with this processor?

Accepted Answer

The processor is compatible with the following operating systems: Windows 11 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit, and Windows 10 - 64-Bit Edition.

Question 8

What is the maximum turbo frequency for this CPU?

Accepted Answer

The maximum turbo frequency for this CPU is up to 5.4 GHz.

Question 9

Does this CPU come with a cooling device?

Accepted Answer

No, this CPU does not come with a cooling device.

Question 10

Can this processor support Error Correction Code (ECC) memory?

Accepted Answer

Yes, this processor supports Error Correction Code (ECC) memory.

Questions & Answers