NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 620 OEM

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GT 620 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 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 's Advantages

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (28.51GB/s vs 14.37GB/s)

336 additional rendering cores

NVIDIA GeForce GT 620 OEM 's Advantages

Lower TDP (30W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640 +344%

0.693 TFLOPS

GeForce GT 620 OEM

0.156 TFLOPS

GeForce GT 640

VS

GeForce GT 620 OEM

Graphics Card

Jun 2012

Release Date

Apr 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

898 MHz

Memory

2GB

Memory Size

512MB

DDR3

Memory Type

DDR3

128bit

Memory Bus

64bit

28.51GB/s

Bandwidth

14.37GB/s

Render Config

-

SM Count

1

384

Shading Units

48

32

TMUs

8

16

ROPs

4

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

1.620 GPixel/s

28.86 GTexel/s

Texture Rate

6.480 GTexel/s

-

692.7 GFLOPS

FP32 (float)

155.5 GFLOPS

28.86 GFLOPS

FP64 (double)

12.96 GFLOPS

Board Design

65W

TDP

30W

250 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

GF119

GK107-300-A2

GPU Variant

-

Kepler

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

0.292 billion

118 mm²

Die Size

79 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

2.1

5.1

Shader Model

5.1

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