AMD Radeon Instinct MI355X vs Leadtek WinFast GTX 660

Comparison of AMD Radeon Instinct MI355X with 288 GB HBM3e and 16,384 cores vs Leadtek WinFast GTX 660 with 2 GB GDDR5 and 960 cores.

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Performance Rating

AMD Radeon Instinct MI355X outperforms Leadtek WinFast GTX 660 by 5,124.58% in the overall GPU ARK performance rating

A100 A100
H200 H200
MI325X MI325X

AMD Radeon Instinct MI355X

93.5

AMD Radeon Instinct MI355X

93.5
RX 7900 XTX RX 7900 XTX
MI250 MI250
Instinct MI300X Instinct MI300X

Leadtek WinFast GTX 660

1.8

Leadtek WinFast GTX 660

1.8

Contents:

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

Memory

Memory Size

🔥 +14,300% 288 ГБ
2 ГБ

Memory Type

HBM3e GDDR5

Memory Bandwidth

🔥 8.19 TB/s
144.2 GB/s

Memory Bus Width

8,192 бит 192 бит

ML Performance

FP16 (Half Precision)

🔥 629.1 TFLOPS
No

BF16 (Brain Float)

No No

TF32 (TensorFloat)

No No

Compute Power

FP32 (Single Precision)

🔥 +3,870% 78.64 TFLOPS
1.981 TFLOPS

FP64 (Double Precision)

🔥 +95,152% 78.64 TFLOPS
0.08256000000000001 TFLOPS

CUDA Cores

🔥 +1,607% 16,384
960

RT Cores

No No

Architecture & Compatibility

GPU Architecture

CDNA 4.0 Kepler

SM (Streaming Multiprocessor)

No No

PCIe Version

PCIe 5.0 x16 PCIe 3.0 x16

ML Software Support

CUDA Version

No 3.0

Clocks & Performance

Base Clock

🔥 +2% 1,000
980

Boost Clock

🔥 +133% 2,400
1,032

Memory Clock

🔥 +33% 2,000
1,502

Power Consumption

TDP/TGP

1400 W
🔥 -90% 140 W

Recommended PSU

1800 W
🔥 -83% 300 W

Power Connector

None 1x 6-pin

Rendering

Texture Units (TMU)

🔥 +1,180% 1,024
80

ROP

No No

L2 Cache

🔥 16 MB
384 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

July 15, 2025 Oct. 15, 2012

Display Outputs

No outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2

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