NVIDIA GeForce 8400 GS Rev. 3 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce 8400 GS Rev. 3 NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS Rev. 3 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 8400 GS Rev. 3 's Advantages

Lower TDP (25W vs 75W)

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 1 years and 9 months late

More VRAM (1536GB vs 512GB)

Larger VRAM bandwidth (38.40GB/s vs 6.400GB/s)

136 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400 GS Rev. 3

0.02 TFLOPS

GeForce GT 640 OEM Rebrand +1975%

0.415 TFLOPS

GeForce 8400 GS Rev. 3

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Jul 2010

Release Date

Apr 2012

GeForce 8

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

400 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

1536MB

DDR2

Memory Type

DDR3

64bit

Memory Bus

192bit

6.400GB/s

Bandwidth

38.40GB/s

Render Config

1

SM Count

3

-

Compute Units

-

8

Shading Units

144

4

TMUs

24

4

ROPs

24

-

Tensor Cores

-

RT Cores

-

L1 Cache

64 KB (per SM)

32 KB

L2 Cache

384 KB

Theoretical Performance

2.080 GPixel/s

Pixel Rate

4.320 GPixel/s

2.080 GTexel/s

Texture Rate

17.28 GTexel/s

-

FP16 (half)

-

19.68 GFLOPS

FP32 (float)

414.7 GFLOPS

-

FP64 (double)

34.56 GFLOPS

Graphics Processor

GT218

GPU Name

GF116

8400GS-225-B1

GPU Variant

GF116-150-A1

Tesla 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.26 billion

Transistors

1.17 billion

57 mm²

Die Size

238 mm²

Board Design

25W

TDP

75W

200 W

Suggested PSU

250 W

1x DVI 1x VGA 1x S-Video

Outputs

2x DVI 1x mini-HDMI 1.3a

None

Power Connectors

None

Graphics Features

11.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

1.2

CUDA

2.1

4.1

Shader Model

5.1

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