NVIDIA GeForce GT 645 OEM vs NVIDIA GeForce 9400 GT PCI

VS

NVIDIA GeForce GT 645 OEM

NVIDIA GeForce 9400 GT PCI

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 256MB VRAM GeForce 9400 GT PCI to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Released 3 years and 8 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (91.87GB/s vs 12.80GB/s)

272 additional rendering cores

NVIDIA GeForce 9400 GT PCI 's Advantages

Lower TDP (50W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM +1886%

0.894 TFLOPS

GeForce 9400 GT PCI

0.045 TFLOPS

GeForce GT 645 OEM

VS

GeForce 9400 GT PCI

Graphics Card

Apr 2012

Release Date

Aug 2008

GeForce 600

Generation

GeForce 9

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCI

Clock Speeds

-

957 MHz

Memory Clock

400 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

DDR2

192bit

Memory Bus

128bit

91.87GB/s

Bandwidth

12.80GB/s

Render Config

-

6

SM Count

2

288

Shading Units

16

48

TMUs

8

24

ROPs

4

-

64 KB (per SM)

L1 Cache

-

384 KB

L2 Cache

32 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

2.200 GPixel/s

37.25 GTexel/s

Texture Rate

4.400 GTexel/s

-

894.0 GFLOPS

FP32 (float)

44.80 GFLOPS

74.50 GFLOPS

FP64 (double)

-

Board Design

102W

TDP

50W

300 W

Suggested PSU

250 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x DVI 1x VGA 1x S-Video

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

G96C

-

Fermi 2.0

Architecture

Tesla

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.95 billion

Transistors

0.314 billion

332 mm²

Die Size

121 mm²

Graphics Features

12 (11_0)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

2.1

CUDA

1.1

5.1

Shader Model

4.0

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