NVIDIA GeForce 8400 vs AMD Radeon HD 7970 X2

VS

NVIDIA GeForce 8400

AMD Radeon HD 7970 X2

We compared two Desktop platform GPUs: 256MB VRAM GeForce 8400 and 3GB VRAM Radeon HD 7970 X2 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 500W)

AMD Radeon HD 7970 X2 's Advantages

Released 4 years and 8 months late

More VRAM (3GB vs 256GB)

Larger VRAM bandwidth (264.0GB/s vs 8.000GB/s)

2040 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400

0.021 TFLOPS

Radeon HD 7970 X2 +17942%

3.789 TFLOPS

GeForce 8400

VS

Radeon HD 7970 X2

Graphics Card

Dec 2007

Release Date

Aug 2012

GeForce 8

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1375 MHz

Memory

256MB

Memory Size

3GB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

384bit

8.000GB/s

Bandwidth

264.0GB/s

Render Config

-

Compute Units

32

1

SM Count

-

8

Shading Units

2048

4

TMUs

128

4

ROPs

32

-

L1 Cache

16 KB (per CU)

16 KB

L2 Cache

768 KB

-

Theoretical Performance

2.160 GPixel/s

Pixel Rate

29.60 GPixel/s

2.160 GTexel/s

Texture Rate

118.4 GTexel/s

-

20.80 GFLOPS

FP32 (float)

3.789 TFLOPS

-

FP64 (double)

947.2 GFLOPS

Board Design

25W

TDP

500W

200 W

Suggested PSU

900 W

1x DVI 1x VGA 1x S-Video

Outputs

2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

None

Power Connectors

3x 8-pin

Graphics Processor

G98

GPU Name

New Zealand

-

Tesla

Architecture

GCN 1.0

TSMC

Foundry

TSMC

65 nm

Process Size

28 nm

0.21 billion

Transistors

4.313 billion

86 mm²

Die Size

352 mm²

Graphics Features

11.1 (10_0)

DirectX

12 (11_1)

3.3

OpenGL

4.6

1.1

OpenCL

1.2

N/A

Vulkan

1.2

1.1

CUDA

-

4.0

Shader Model

5.1

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