NVIDIA GeForce GT 640 OEM Rebrand vs ATI Radeon HD 5950

VS

NVIDIA GeForce GT 640 OEM Rebrand

ATI Radeon HD 5950

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 1024MB VRAM ATI Radeon HD 5950 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

More VRAM (1536GB vs 1024GB)

Lower TDP (75W vs 302W)

ATI Radeon HD 5950 's Advantages

Larger VRAM bandwidth (128.0GB/s vs 38.40GB/s)

1296 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

ATI Radeon HD 5950 +403%

2.088 TFLOPS

GeForce GT 640 OEM Rebrand

VS

ATI Radeon HD 5950

Graphics Card

Apr 2012

Release Date

Unknown

GeForce 600

Generation

Evergreen

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

1000 MHz

Memory

1536MB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

192bit

Memory Bus

256bit

38.40GB/s

Bandwidth

128.0GB/s

Render Config

-

Compute Units

18

3

SM Count

-

144

Shading Units

1440

24

TMUs

72

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

23.20 GPixel/s

17.28 GTexel/s

Texture Rate

52.20 GTexel/s

-

414.7 GFLOPS

FP32 (float)

2.088 TFLOPS

34.56 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

302W

250 W

Suggested PSU

700 W

2x DVI 1x mini-HDMI 1.3a

Outputs

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

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GF116

GPU Name

Hemlock

GF116-150-A1

GPU Variant

Hemlock PRO

Fermi 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.17 billion

Transistors

2.154 billion

238 mm²

Die Size

334 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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