NVIDIA GeForce GT 640 vs AMD Radeon HD 6970

VS

NVIDIA GeForce GT 640

AMD Radeon HD 6970

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 2GB VRAM Radeon HD 6970 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 1 years and 6 months late

Lower TDP (65W vs 250W)

AMD Radeon HD 6970 's Advantages

Larger VRAM bandwidth (176.0GB/s vs 28.51GB/s)

1152 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon HD 6970 +290%

2.703 TFLOPS

GeForce GT 640

VS

Radeon HD 6970

Graphics Card

Jun 2012

Release Date

Dec 2010

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

176.0GB/s

Render Config

-

Compute Units

24

-

384

Shading Units

1536

32

TMUs

96

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

28.16 GPixel/s

28.86 GTexel/s

Texture Rate

84.48 GTexel/s

-

692.7 GFLOPS

FP32 (float)

2.703 TFLOPS

28.86 GFLOPS

FP64 (double)

675.8 GFLOPS

Board Design

65W

TDP

250W

250 W

Suggested PSU

600 W

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

Outputs

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

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK107

GPU Name

Cayman

GK107-300-A2

GPU Variant

Cayman XT (215-0807007)

Kepler

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

2.64 billion

118 mm²

Die Size

389 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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