NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 580

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 580

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1536MB VRAM GeForce GTX 580 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 7 months late

More VRAM (2GB vs 1536GB)

Lower TDP (65W vs 244W)

NVIDIA GeForce GTX 580 's Advantages

Larger VRAM bandwidth (192.4GB/s vs 28.51GB/s)

128 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 580 +128%

1.581 TFLOPS

GeForce GT 640

VS

GeForce GTX 580

Graphics Card

Jun 2012

Release Date

Nov 2010

GeForce 600

Generation

GeForce 500

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1002 MHz

Memory

2GB

Memory Size

1536MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

192.4GB/s

Render Config

-

SM Count

16

384

Shading Units

512

32

TMUs

64

16

ROPs

48

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

24.70 GPixel/s

28.86 GTexel/s

Texture Rate

49.41 GTexel/s

-

692.7 GFLOPS

FP32 (float)

1.581 TFLOPS

28.86 GFLOPS

FP64 (double)

197.6 GFLOPS

Board Design

65W

TDP

244W

250 W

Suggested PSU

550 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK107

GPU Name

GF110

GK107-300-A2

GPU Variant

GF110-375-A1

Kepler

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

3 billion

118 mm²

Die Size

520 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

2.0

5.1

Shader Model

5.1

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