AMD Radeon Instinct MI355X vs Sapphire TOXIC RX 6950 XT Limited Edition

Comparison of AMD Radeon Instinct MI355X with 288 GB HBM3e and 16,384 cores vs Sapphire TOXIC RX 6950 XT Limited Edition with 16 GB GDDR6 and 5,120 cores.

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Performance Rating

H200 H200
MI325X MI325X
A100 A100

AMD Radeon Instinct MI355X

AMD Radeon Instinct MI355X

RX 7900 XTX RX 7900 XTX
Instinct MI300X Instinct MI300X
MI250 MI250

Sapphire TOXIC RX 6950 XT Limited Edition

Sapphire TOXIC RX 6950 XT Limited Edition

Contents:

Memory ML Performance Compute Power Architecture & Compatibility ML Software Support Clocks & Performance Power Consumption Rendering Benchmarks Additional

Memory

Memory Size

288 GB 16 GB

Memory Type

HBM3e GDDR6

Memory Bandwidth

8.19 TB/s 576.0 GB/s

Memory Bus Width

8,192 бит 256 бит

ML Performance

FP16 (Half Precision)

629.1 TFLOPS 51.86 TFLOPS

BF16 (Brain Float)

No No

TF32 (TensorFloat)

No No

Compute Power

FP32 (Single Precision)

78.64 TFLOPS 25.93 TFLOPS

FP64 (Double Precision)

78.64 TFLOPS 1.62 TFLOPS

CUDA Cores

16,384 5,120

RT Cores

No 80

Architecture & Compatibility

GPU Architecture

CDNA 4.0 RDNA 2.0

SM (Streaming Multiprocessor)

No No

PCIe Version

PCIe 5.0 x16 PCIe 4.0 x16

ML Software Support

CUDA Version

No No

Clocks & Performance

Base Clock

1,000 1,860

Boost Clock

2,400 2,532

Memory Clock

2,000 2,250

Power Consumption

TDP/TGP

1400 W
🔥 -76% 335 W

Recommended PSU

1800 W
🔥 -61% 700 W

Power Connector

None 1x 6-pin + 2x 8-pin

Rendering

Texture Units (TMU)

1,024 320

ROP

No 80

L2 Cache

32 MB 4 MB

Benchmarks

MLPerf, llama2-70b-99.9 (mxfp4)

10 129 tokens/s

MLPerf, llama3.1-405b (mxfp4)

252.4 tokens/s

Additional

Slots

OAM Module Dual-slot

Release Date

March 12, 2025 May 10, 2022

Display Outputs

No outputs
1x HDMI 2.1
2x DisplayPort 1.4a

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