NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce 8400 GS PCI Rev. 2

VS

NVIDIA GeForce GT 640 OEM Rebrand

NVIDIA GeForce 8400 GS PCI Rev. 2

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 512MB VRAM GeForce 8400 GS PCI Rev. 2 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

Released 5 years late

More VRAM (1536GB vs 512GB)

Larger VRAM bandwidth (38.40GB/s vs 8.000GB/s)

128 additional rendering cores

NVIDIA GeForce 8400 GS PCI Rev. 2 's Advantages

Lower TDP (40W vs 75W)

Score

Benchmark

FP32 (float)

GeForce GT 640 OEM Rebrand +964%

0.415 TFLOPS

GeForce 8400 GS PCI Rev. 2

0.039 TFLOPS

GeForce GT 640 OEM Rebrand

VS

GeForce 8400 GS PCI Rev. 2

Graphics Card

Apr 2012

Release Date

Apr 2007

GeForce 600

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCI

Clock Speeds

-

800 MHz

Memory Clock

500 MHz

Memory

1536MB

Memory Size

512MB

DDR3

Memory Type

DDR3

192bit

Memory Bus

64bit

38.40GB/s

Bandwidth

8.000GB/s

Render Config

-

3

SM Count

2

144

Shading Units

16

24

TMUs

8

24

ROPs

4

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

32 KB

-

Theoretical Performance

4.320 GPixel/s

Pixel Rate

2.080 GPixel/s

17.28 GTexel/s

Texture Rate

4.160 GTexel/s

-

414.7 GFLOPS

FP32 (float)

39.36 GFLOPS

34.56 GFLOPS

FP64 (double)

-

Board Design

75W

TDP

40W

250 W

Suggested PSU

200 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x HDMI 1x VGA

None

Power Connectors

None

Graphics Processor

GF116

GPU Name

GT218

GF116-150-A1

GPU Variant

-

Fermi 2.0

Architecture

Tesla 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.17 billion

Transistors

0.26 billion

238 mm²

Die Size

57 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_1)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

1.2

5.1

Shader Model

4.1

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