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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

  • Product nameRyzen Threadripper PRO 9955WX
  • CPU cores16-Core
  • CPU socketSocket sTR5
  • Maximum turbo clockUp to 5.4 GHz
  • TDP rating350 W
  • Processor classDesktop
  • 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.

How it compares

Measured against everything we stock in Desktop Processors, at today’s prices. Recalculated every night.

Price $1,085.99
Pricier than about 90% of the 494 comparable items (median $149.99).
CPU cores 16-Core
Higher than about 70% of the 271 comparable items (median 8).
Maximum turbo clock Up to 5.4 GHz
Higher than about 80% of the 246 comparable items (median 4.7 GHz).

New to this? Buying a processor with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameAMD
Product lineRyzen Threadripper PRO 9000 WX-Series
Model name100-100000725WOF
Product nameRyzen Threadripper PRO 9955WX
Performance
Working frequency4.5 GHz
Processor
CPU cores16-Core
CPU socketSocket sTR5
Maximum turbo clockUp to 5.4 GHz
TDP rating350 W
Processor classDesktop
Processor codenameShimada Peak
CPU threads32-Threads
L1 cache size1280 KB
Level 2 cache16 MB
Level 3 cache64 MB
Process nodeTSMC 4 nm FinFET
CPU instruction set64-Bit
Virtualization supportYes
Max PCIe lanes148, 144, 128 (Total/Usable/PCIe 5.0)
Memory
Supported memoryDDR5 6400
Channel configuration8
ECC memorySupported
Graphics
Built-in graphicsNone Integrated Graphics
Ports & slots
PCIe generation5.0
Size & build
Shipping weight0.36 kg
Package size127 × 127 × 53 mm
Compatibility
Compatible desktop chipsetsAMD Pro 695 / AMD TRX50 / AMD WRX90
Compatible systemsWindows 11–64-Bit Edition, RHEL x86 64-Bit, Ubuntu x86 64-Bit, Windows 10–64-Bit Edition
In the box
Included coolerNot included - Processor Only
More details
Advanced technologiesAMD EXPO Technology , AMD PRO technologies , AMD Ryzen Technologies

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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