NVIDIA GeForce 8400 vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce 8400

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 256MB VRAM GeForce 8400 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 8400 's Advantages

Lower TDP (25W vs 65W)

NVIDIA GeForce GTX 645 OEM 's Advantages

Released 5 years and 4 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (64.00GB/s vs 8.000GB/s)

568 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400

0.021 TFLOPS

GeForce GTX 645 OEM +4419%

0.949 TFLOPS

GeForce 8400

VS

GeForce GTX 645 OEM

Graphics Card

Dec 2007

Release Date

Apr 2013

GeForce 8

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1000 MHz

Memory

256MB

Memory Size

1024MB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

128bit

8.000GB/s

Bandwidth

64.00GB/s

Render Config

-

1

SM Count

-

8

Shading Units

576

4

TMUs

48

4

ROPs

16

-

L1 Cache

16 KB (per SMX)

16 KB

L2 Cache

256 KB

-

Theoretical Performance

2.160 GPixel/s

Pixel Rate

9.888 GPixel/s

2.160 GTexel/s

Texture Rate

39.55 GTexel/s

-

20.80 GFLOPS

FP32 (float)

949.2 GFLOPS

-

FP64 (double)

39.55 GFLOPS

Board Design

25W

TDP

65W

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

G98

GPU Name

GK106

-

GPU Variant

GK106-200-A1

Tesla

Architecture

Kepler

TSMC

Foundry

TSMC

65 nm

Process Size

28 nm

0.21 billion

Transistors

2.54 billion

86 mm²

Die Size

221 mm²

Graphics Features

11.1 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

CUDA

3.0

4.0

Shader Model

5.1

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