NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GT 640 Rev. 2

VS

NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 645 OEM 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 40.06GB/s)

192 additional rendering cores

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Lower TDP (49W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM +18%

0.949 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

GeForce GTX 645 OEM

VS

GeForce GT 640 Rev. 2

Graphics Card

Apr 2013

Release Date

May 2013

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

-

1000 MHz

Memory Clock

1252 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

64bit

64.00GB/s

Bandwidth

40.06GB/s

Render Config

-

576

Shading Units

384

48

TMUs

32

16

ROPs

8

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

9.888 GPixel/s

Pixel Rate

8.368 GPixel/s

39.55 GTexel/s

Texture Rate

33.47 GTexel/s

-

949.2 GFLOPS

FP32 (float)

803.3 GFLOPS

39.55 GFLOPS

FP64 (double)

33.47 GFLOPS

Board Design

65W

TDP

49W

250 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

None

Power Connectors

None

Graphics Processor

GK106

GPU Name

GK208

GK106-200-A1

GPU Variant

GK208-400-A1

Kepler

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

1.02 billion

221 mm²

Die Size

87 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.5

5.1

Shader Model

5.1

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