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

VS

NVIDIA GeForce 8400 GS Rev. 3

NVIDIA GeForce GT 640 OEM

We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS Rev. 3 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 8400 GS Rev. 3 's Advantages

Lower TDP (25W vs 50W)

NVIDIA GeForce GT 640 OEM 's Advantages

Released 1 years and 9 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (28.51GB/s vs 6.400GB/s)

376 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400 GS Rev. 3

0.02 TFLOPS

GeForce GT 640 OEM +2960%

0.612 TFLOPS

GeForce 8400 GS Rev. 3

VS

GeForce GT 640 OEM

Graphics Card

Jul 2010

Release Date

Apr 2012

GeForce 8

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

400 MHz

Memory Clock

891 MHz

Memory

512MB

Memory Size

2GB

DDR2

Memory Type

DDR3

64bit

Memory Bus

128bit

6.400GB/s

Bandwidth

28.51GB/s

Render Config

-

1

SM Count

-

8

Shading Units

384

4

TMUs

32

4

ROPs

16

-

L1 Cache

16 KB (per SMX)

32 KB

L2 Cache

256 KB

-

Theoretical Performance

2.080 GPixel/s

Pixel Rate

6.376 GPixel/s

2.080 GTexel/s

Texture Rate

25.50 GTexel/s

-

19.68 GFLOPS

FP32 (float)

612.1 GFLOPS

-

FP64 (double)

25.50 GFLOPS

Board Design

25W

TDP

50W

200 W

Suggested PSU

250 W

1x DVI 1x VGA 1x S-Video

Outputs

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

None

Power Connectors

None

Graphics Processor

GT218

GPU Name

GK107

8400GS-225-B1

GPU Variant

GK107-320-A2

Tesla 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

0.26 billion

Transistors

1.27 billion

57 mm²

Die Size

118 mm²

Graphics Features

11.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

1.2

CUDA

3.0

4.1

Shader Model

5.1

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