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

VS

AMD Radeon HD 7970 GHz Edition

NVIDIA GeForce GT 640 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 GHz Edition and 2GB VRAM GeForce GT 640 OEM 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 2GB)

Larger VRAM bandwidth (288.0GB/s vs 28.51GB/s)

1664 additional rendering cores

NVIDIA GeForce GT 640 OEM 's Advantages

Lower TDP (50W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 GHz Edition +602%

4.301 TFLOPS

GeForce GT 640 OEM

0.612 TFLOPS

Radeon HD 7970 GHz Edition

VS

GeForce GT 640 OEM

Graphics Card

Jun 2012

Release Date

Apr 2012

Southern Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1050 MHz

Boost Clock

-

1500 MHz

Memory Clock

891 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

384bit

Memory Bus

128bit

288.0GB/s

Bandwidth

28.51GB/s

Render Config

32

Compute Units

-

2048

Shading Units

384

128

TMUs

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

33.60 GPixel/s

Pixel Rate

6.376 GPixel/s

134.4 GTexel/s

Texture Rate

25.50 GTexel/s

-

4.301 TFLOPS

FP32 (float)

612.1 GFLOPS

1075 GFLOPS

FP64 (double)

25.50 GFLOPS

Board Design

300W

TDP

50W

700 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

GK107

Tahiti XT2 (215-0821065)

GPU Variant

GK107-320-A2

GCN 1.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

1.27 billion

352 mm²

Die Size

118 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

5.1

Shader Model

5.1

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