NVIDIA GeForce GT 640 vs NVIDIA GeForce 9400 GT Rev. 3

VS

NVIDIA GeForce GT 640

NVIDIA GeForce 9400 GT Rev. 3

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 128MB VRAM GeForce 9400 GT Rev. 3 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 128GB)

Larger VRAM bandwidth (28.51GB/s vs 9.600GB/s)

368 additional rendering cores

NVIDIA GeForce 9400 GT Rev. 3 's Advantages

Lower TDP (50W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640 +1440%

0.693 TFLOPS

GeForce 9400 GT Rev. 3

0.045 TFLOPS

GeForce GT 640

VS

GeForce 9400 GT Rev. 3

Graphics Card

Jun 2012

Release Date

Jun 2012

GeForce 600

Generation

GeForce 9

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

600 MHz

Memory

2GB

Memory Size

128MB

DDR3

Memory Type

DDR2

128bit

Memory Bus

64bit

28.51GB/s

Bandwidth

9.600GB/s

Render Config

-

SM Count

2

384

Shading Units

16

32

TMUs

8

16

ROPs

4

-

16 KB (per SMX)

L1 Cache

-

256 KB

L2 Cache

32 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

2.356 GPixel/s

28.86 GTexel/s

Texture Rate

4.712 GTexel/s

-

692.7 GFLOPS

FP32 (float)

44.86 GFLOPS

28.86 GFLOPS

FP64 (double)

-

Board Design

65W

TDP

50W

250 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x VGA 1x S-Video

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

GT218

GK107-300-A2

GPU Variant

GT218-670-B1

Kepler

Architecture

Tesla 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

0.26 billion

118 mm²

Die Size

57 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_1)

4.6

OpenGL

3.3

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

1.2

5.1

Shader Model

4.1

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