NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce GT 620 OEM

VS

NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce GT 620 OEM

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 512MB VRAM GeForce GT 620 OEM 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 512GB)

Larger VRAM bandwidth (38.40GB/s vs 14.37GB/s)

96 additional rendering cores

NVIDIA GeForce GT 620 OEM 's Advantages

Lower TDP (30W vs 75W)

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand +166%

0.415 TFLOPS

GeForce GT 620 OEM

0.156 TFLOPS

GeForce GT 640 OEM Rebrand

VS

GeForce GT 620 OEM

Graphics Card

Apr 2012

Release Date

Apr 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

800 MHz

Memory Clock

898 MHz

Memory

1536MB

Memory Size

512MB

DDR3

Memory Type

DDR3

192bit

Memory Bus

64bit

38.40GB/s

Bandwidth

14.37GB/s

Render Config

-

3

SM Count

1

144

Shading Units

48

24

TMUs

8

24

ROPs

4

-

64 KB (per SM)

L1 Cache

64 KB (per SM)

384 KB

L2 Cache

128 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

1.620 GPixel/s

17.28 GTexel/s

Texture Rate

6.480 GTexel/s

-

414.7 GFLOPS

FP32 (float)

155.5 GFLOPS

34.56 GFLOPS

FP64 (double)

12.96 GFLOPS

Board Design

75W

TDP

30W

250 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

None

Graphics Processor

GF116

GPU Name

GF119

GF116-150-A1

GPU Variant

-

Fermi 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.17 billion

Transistors

0.292 billion

238 mm²

Die Size

79 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

2.1

5.1

Shader Model

5.1

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