AMD Radeon HD 7970 X2 vs NVIDIA GeForce 8400 GS PCI

VS

AMD Radeon HD 7970 X2

NVIDIA GeForce 8400 GS PCI

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 512MB VRAM GeForce 8400 GS PCI to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 X2 's Advantages

Released 4 years and 8 months late

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 5.328GB/s)

2040 additional rendering cores

NVIDIA GeForce 8400 GS PCI 's Advantages

Lower TDP (25W vs 500W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 X2 +17122%

3.789 TFLOPS

GeForce 8400 GS PCI

0.022 TFLOPS

Radeon HD 7970 X2

VS

GeForce 8400 GS PCI

Graphics Card

Aug 2012

Release Date

Dec 2007

Southern Islands

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCI

Clock Speeds

-

1375 MHz

Memory Clock

333 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

DDR2

384bit

Memory Bus

64bit

264.0GB/s

Bandwidth

5.328GB/s

Render Config

32

Compute Units

-

SM Count

1

2048

Shading Units

8

128

TMUs

4

32

ROPs

4

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

16 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

2.268 GPixel/s

118.4 GTexel/s

Texture Rate

2.268 GTexel/s

-

3.789 TFLOPS

FP32 (float)

22.40 GFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

500W

TDP

25W

900 W

Suggested PSU

200 W

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

Outputs

1x S-Video 1x DMS-59

3x 8-pin

Power Connectors

None

Graphics Processor

New Zealand

GPU Name

G98

-

GPU Variant

G98-400-U2

GCN 1.0

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

65 nm

4.313 billion

Transistors

0.21 billion

352 mm²

Die Size

86 mm²

Graphics Features

12 (11_1)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

1.1

5.1

Shader Model

4.0

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