AMD Radeon Instinct MI355X vs ASRock RX 6400 Challenger ITX

Comparison of AMD Radeon Instinct MI355X with 288 GB HBM3e and 16,384 cores vs ASRock RX 6400 Challenger ITX with 4 GB GDDR6 and 768 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

ASRock RX 6400 Challenger ITX

ASRock RX 6400 Challenger ITX

Contents:

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

Memory

Memory Size

288 GB 4 GB

Memory Type

HBM3e GDDR6

Memory Bandwidth

8.19 TB/s 128.0 GB/s

Memory Bus Width

8,192 бит 64 бит

ML Performance

FP16 (Half Precision)

629.1 TFLOPS 7.13 TFLOPS

BF16 (Brain Float)

No No

TF32 (TensorFloat)

No No

Compute Power

FP32 (Single Precision)

78.64 TFLOPS 3.565 TFLOPS

FP64 (Double Precision)

78.64 TFLOPS 0.2228 TFLOPS

CUDA Cores

16,384 768

RT Cores

No 12

Architecture & Compatibility

GPU Architecture

CDNA 4.0 RDNA 2.0

SM (Streaming Multiprocessor)

No No

PCIe Version

PCIe 5.0 x16 PCIe 4.0 x4

ML Software Support

CUDA Version

No No

Clocks & Performance

Base Clock

1,000 1,923

Boost Clock

2,400 2,321

Memory Clock

2,000 2,000

Power Consumption

TDP/TGP

1400 W
🔥 -96% 53 W

Recommended PSU

1800 W
🔥 -86% 250 W

Power Connector

None None

Rendering

Texture Units (TMU)

1,024 48

ROP

No 12

L2 Cache

32 MB 1024 KB

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 Jan. 19, 2022

Display Outputs

No outputs
1x HDMI 2.1
1x DisplayPort 1.4a

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