AMD Radeon HD 7970 GHz Edition vs NVIDIA GeForce GT 640 OEM Rebrand

VS

AMD Radeon HD 7970 GHz Edition NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 GHz Edition and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 GHz Edition 's Advantages

Boost Clock1050MHz

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (288.0GB/s vs 38.40GB/s)

1904 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 GHz Edition +936%

4.301 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon HD 7970 GHz Edition

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Jun 2012

Release Date

Apr 2012

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1050 MHz

Boost Clock

-

1500 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

1536MB

GDDR5

Memory Type

DDR3

384bit

Memory Bus

192bit

288.0GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

3

32

Compute Units

-

2048

Shading Units

144

128

TMUs

24

32

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

768 KB

L2 Cache

384 KB

Theoretical Performance

33.60 GPixel/s

Pixel Rate

4.320 GPixel/s

134.4 GTexel/s

Texture Rate

17.28 GTexel/s

-

FP16 (half)

-

4.301 TFLOPS

FP32 (float)

414.7 GFLOPS

1075 GFLOPS

FP64 (double)

34.56 GFLOPS

Graphics Processor

Tahiti

GPU Name

GF116

Tahiti XT2 (215-0821065)

GPU Variant

GF116-150-A1

GCN 1.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

1.17 billion

352 mm²

Die Size

238 mm²

Board Design

300W

TDP

75W

700 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

5.1

Shader Model

5.1

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