NVIDIA GeForce 9400 GT PCI vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce 9400 GT PCI

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 256MB VRAM GeForce 9400 GT PCI 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 9400 GT PCI 's Advantages

Lower TDP (50W vs 75W)

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Released 3 years and 8 months late

More VRAM (1536GB vs 256GB)

Larger VRAM bandwidth (38.40GB/s vs 12.80GB/s)

128 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 9400 GT PCI

0.045 TFLOPS

GeForce GT 640 OEM Rebrand +822%

0.415 TFLOPS

GeForce 9400 GT PCI

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Aug 2008

Release Date

Apr 2012

GeForce 9

Generation

GeForce 600

Desktop

Type

Desktop

PCI

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

400 MHz

Memory Clock

800 MHz

Memory

256MB

Memory Size

1536MB

DDR2

Memory Type

DDR3

128bit

Memory Bus

192bit

12.80GB/s

Bandwidth

38.40GB/s

Render Config

-

2

SM Count

3

16

Shading Units

144

8

TMUs

24

4

ROPs

24

-

L1 Cache

64 KB (per SM)

32 KB

L2 Cache

384 KB

-

Theoretical Performance

2.200 GPixel/s

Pixel Rate

4.320 GPixel/s

4.400 GTexel/s

Texture Rate

17.28 GTexel/s

-

44.80 GFLOPS

FP32 (float)

414.7 GFLOPS

-

FP64 (double)

34.56 GFLOPS

Board Design

50W

TDP

75W

250 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 Processor

G96C

GPU Name

GF116

-

GPU Variant

GF116-150-A1

Tesla

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.314 billion

Transistors

1.17 billion

121 mm²

Die Size

238 mm²

Graphics Features

11.1 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

1.1

N/A

Vulkan

N/A

1.1

CUDA

2.1

4.0

Shader Model

5.1

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