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Square metallic CPU with gold contacts and green substrate, branded AMD Ryzen Threadripper PRO 9955WX

AMD

AMD Ryzen Threadripper PRO 9955WX 100-100000725WOF desktop processor

SKU CH-52V2-FMYRW MPN 100-100000725WOF

16-core desktop workstation processor reaching 5.4 GHz max turbo with 64 MB L3 cache, eight-channel DDR5-6400 support and ECC memory for demanding professional workloads

  • Processors TypeDesktop
  • NameRyzen Threadripper PRO 9955WX
  • CPU Socket TypeSocket sTR5
  • Core NameShimada Peak
  • # of Cores16-Core
  • # of Threads32-Threads
  • 16 cores and 32 threads accelerate multi-threaded workloads
  • Max turbo up to 5.4 GHz boosts single-thread responsiveness
  • 64 MB L3 cache reduces latency for large datasets
  • 8-channel DDR5-6400 with ECC support expands memory bandwidth
  • 350 W TDP on TSMC 4 nm enables sustained high performance

16-Core Workstation CPU

The AMD Ryzen Threadripper PRO 9955WX is a desktop processor built for professional workstations. It targets artists, architects and engineers who need high multi-threaded throughput for rendering, simulation and complex design workloads. The chip delivers 16 cores and 32 threads on the Zen 4 architecture.

Socket sTR5 Platform Implications

The processor fits the Socket sTR5 interface and carries a 350 W thermal design power, so a robust cooling solution and a compatible motherboard are essential. Eight-channel DDR5 6400 memory support with ECC enables large, error-corrected datasets. No integrated graphics are present, requiring a discrete GPU for display output.

Pre-Purchase Compatibility Checks

Verify that your motherboard uses the sTR5 socket and that its power delivery can sustain 350 W. Confirm the CPU cooler clearance and mounting pattern match the Threadripper form factor. Ensure the power supply provides sufficient 12 V current and that the chassis accommodates the required airflow for sustained loads.

Highlights

  • 16 cores and 32 threads accelerate multi-threaded workloads
  • Max turbo up to 5.4 GHz boosts single-thread responsiveness
  • 64 MB L3 cache reduces latency for large datasets
  • 8-channel DDR5-6400 with ECC support expands memory bandwidth
  • 350 W TDP on TSMC 4 nm enables sustained high performance

Specifications

BrandAMD
Processors TypeDesktop
SeriesRyzen Threadripper PRO 9000 WX-Series
NameRyzen Threadripper PRO 9955WX
Model100-100000725WOF
CPU Socket TypeSocket sTR5
Core NameShimada Peak
# of Cores16-Core
# of Threads32-Threads
Operating Frequency4.5 GHz
Max Turbo FrequencyUp to 5.4 GHz
L1 Cache1280 KB
L2 Cache16MB
L3 Cache64MB
Manufacturing TechTSMC 4nm FinFET
Instruction Set64-Bit
Memory TypesDDR5 6400
Memory Channel8
ECC MemorySupported
Virtualization Technology SupportYes
Integrated GraphicsNone Integrated Graphics
PCI Express Revision5.0
Max Number of PCI Express Lanes148, 144, 128 (Total/Usable/PCIe 5.0)
Thermal Design Power350W
Cooling DeviceCooling device not included - Processor Only
Compatible Desktop ChipsetsAMD Pro 695 / AMD TRX50 / AMD WRX90
Operating System SupportedWindows 11 - 64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit, Windows 10 - 64-Bit Edition
Advanced TechnologiesAMD EXPO Technology , AMD PRO technologies , AMD Ryzen Technologies
Shipping weight0.36 kg
Package size127 × 127 × 53 mm

Questions about this item

What DDR5 speed does the 9955WX officially support across its 8 channels?

The processor is rated for DDR5 6400 across eight channels, so that is the maximum guaranteed data rate without overclocking.

What socket and cooler mounting does the 16-core 9955WX require?

It uses the sTR5 socket and needs a Threadripper-compatible cooler with the correct sTR5 mounting pattern and enough capacity for the 350 W TDP.

How is the 9955WX installed, and what step is often missed?

Place the CPU in the sTR5 carrier, torque the retention screws in the prescribed diagonal sequence, then apply thermal paste and mount the cooler; skipping the torque sequence can leave uneven contact and cause thermal throttling.

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