AMD Radeon Instinct MI355X vs Gainward RTX 4090 Phantom GS

Comparison of AMD Radeon Instinct MI355X with 288 GB HBM3e and 16,384 cores vs Gainward RTX 4090 Phantom GS with 24 GB GDDR6X and 16,384 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

Gainward RTX 4090 Phantom GS

Gainward RTX 4090 Phantom GS

Contents:

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

Memory

Memory Size

288 GB 24 GB

Memory Type

HBM3e GDDR6X

Memory Bandwidth

8.19 TB/s 1.01 TB/s

Memory Bus Width

8,192 бит 384 бит

ML Performance

FP16 (Half Precision)

629.1 TFLOPS 85.52 TFLOPS

BF16 (Brain Float)

No No

TF32 (TensorFloat)

No No

Compute Power

FP32 (Single Precision)

78.64 TFLOPS 85.52 TFLOPS

FP64 (Double Precision)

78.64 TFLOPS 1.3363 TFLOPS

CUDA Cores

16,384 16,384

RT Cores

No 128

Architecture & Compatibility

GPU Architecture

CDNA 4.0 Ada Lovelace

SM (Streaming Multiprocessor)

No 128

PCIe Version

PCIe 5.0 x16 PCIe 4.0 x16

ML Software Support

CUDA Version

No 8.9

Clocks & Performance

Base Clock

1,000 2,235

Boost Clock

2,400 2,610

Memory Clock

2,000 1,313

Power Consumption

TDP/TGP

1400 W
🔥 -68% 450 W

Recommended PSU

1800 W
🔥 -53% 850 W

Power Connector

None 1x 16-pin

Rendering

Texture Units (TMU)

1,024 512

ROP

No 128

L2 Cache

32 MB 72 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 Quad-slot

Release Date

March 12, 2025 Sept. 20, 2022

Display Outputs

No outputs
1x HDMI 2.1
3x DisplayPort 1.4a

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