NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon HD 6870

VS

NVIDIA GeForce GT 640 OEM Rebrand

AMD Radeon HD 6870

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 1 years and 6 months late

More VRAM (1536GB vs 1024GB)

Lower TDP (75W vs 151W)

AMD Radeon HD 6870 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 38.40GB/s)

976 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

Radeon HD 6870 +385%

2.016 TFLOPS

GeForce GT 640 OEM Rebrand

VS

Radeon HD 6870

Graphics Card

Apr 2012

Release Date

Oct 2010

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1050 MHz

Memory

1536MB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

192bit

Memory Bus

256bit

38.40GB/s

Bandwidth

134.4GB/s

Render Config

-

Compute Units

14

3

SM Count

-

144

Shading Units

1120

24

TMUs

56

24

ROPs

32

-

64 KB (per SM)

L1 Cache

8 KB (per CU)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

28.80 GPixel/s

17.28 GTexel/s

Texture Rate

50.40 GTexel/s

-

414.7 GFLOPS

FP32 (float)

2.016 TFLOPS

34.56 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

151W

250 W

Suggested PSU

450 W

2x DVI 1x mini-HDMI 1.3a

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

None

Power Connectors

2x 6-pin

Graphics Processor

GF116

GPU Name

Barts

GF116-150-A1

GPU Variant

Barts XT (215-0798000)

Fermi 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.17 billion

Transistors

1.7 billion

238 mm²

Die Size

255 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

2.1

CUDA

-

5.1

Shader Model

5.0

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