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

VS

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

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

Main Differences

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Released 1 years and 1 months late

Larger VRAM bandwidth (40.06GB/s vs 28.51GB/s)

Lower TDP (49W vs 50W)

NVIDIA GeForce GT 640 OEM 's Advantages

More VRAM (2GB vs 1GB)

Score

Benchmark

FP32 (float)

GeForce GT 640 Rev. 2 +31%

0.803 TFLOPS

GeForce GT 640 OEM

0.612 TFLOPS

GeForce GT 640 Rev. 2

VS

GeForce GT 640 OEM

Graphics Card

May 2013

Release Date

Apr 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1252 MHz

Memory Clock

891 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

128bit

40.06GB/s

Bandwidth

28.51GB/s

Render Config

-

SM Count

-

Compute Units

-

384

Shading Units

384

32

TMUs

32

8

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

Theoretical Performance

8.368 GPixel/s

Pixel Rate

6.376 GPixel/s

33.47 GTexel/s

Texture Rate

25.50 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

612.1 GFLOPS

33.47 GFLOPS

FP64 (double)

25.50 GFLOPS

Graphics Processor

GK208

GPU Name

GK107

GK208-400-A1

GPU Variant

GK107-320-A2

Kepler 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.02 billion

Transistors

1.27 billion

87 mm²

Die Size

118 mm²

Board Design

49W

TDP

50W

200 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

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

None

Power Connectors

None

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.5

CUDA

3.0

5.1

Shader Model

5.1

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