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

VS

NVIDIA GeForce GT 645 OEM

NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 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 GT 645 OEM 's Advantages

Larger VRAM bandwidth (91.87GB/s vs 40.06GB/s)

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Released 1 years and 1 months late

96 additional rendering cores

Lower TDP (49W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +11%

0.894 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

GeForce GT 645 OEM

VS

GeForce GT 640 Rev. 2

Graphics Card

Apr 2012

Release Date

May 2013

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

-

957 MHz

Memory Clock

1252 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

40.06GB/s

Render Config

-

6

SM Count

-

288

Shading Units

384

48

TMUs

32

24

ROPs

8

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

384 KB

L2 Cache

512 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

8.368 GPixel/s

37.25 GTexel/s

Texture Rate

33.47 GTexel/s

-

894.0 GFLOPS

FP32 (float)

803.3 GFLOPS

74.50 GFLOPS

FP64 (double)

33.47 GFLOPS

Board Design

102W

TDP

49W

300 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

GK208

-

GPU Variant

GK208-400-A1

Fermi 2.0

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.95 billion

Transistors

1.02 billion

332 mm²

Die Size

87 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

2.1

CUDA

3.5

5.1

Shader Model

5.1

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