AMD Threadripper Pro 9985WX 5.4GHz Socket STR5 Boxed

Cores and performance

• 64 Zen 5 cores and 128 SMT threads, base 3.2 GHz and maximum boost up to 5.4 GHz at optimised loads, with Precision Boost 2 and unlocked overclocking.

• Massive cache: 5,120 KB L1, 64 MB L2, 256 MB L3 (total ~325 MB), reducing latencies on huge datasets and parallel workloads.

• 9 dies architecture (8 CCDs + IOD), with AVX-512, native bfloat16/FP16 for AI and ~3-4x higher multicore performance than Ryzen 9 9950X3D.

Platform and connectivity

• Socket sTR5 (SP6) for WRX90 (workstation) or TRX50 boards, with 128 PCIe 5.0 lanes (144 total with chipset) for massive multi-GPU/SSD configurations.

• DDR5-6400 ECC octa-channel memory (up to 2TB RDIMM OC), AMD EXPO and Registered ECC support for 24/7 stability.

• 6nm die I/O with PRO Manageability (DASH), Memory Guard and Secure Processor for enterprise environments.

Efficiency and thermal

• TDP 350 W requires custom premium cooling (AIO 560mm+, custom direct loop); manufactured on TSMC 4nm (CCD) without heatsink in retail box.

• Tjmax 95°C with thermal monitoring; peak power >400W in all-core boost, optimised for Zen 5 efficiency (~20% better vs Zen 4).