AMD Radeon HD 7950 vs NVIDIA GeForce 8400 GS Rev. 3

VS

AMD Radeon HD 7950

NVIDIA GeForce 8400 GS Rev. 3

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7950 and 512MB VRAM GeForce 8400 GS Rev. 3 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7950 's Advantages

Released 1 years and 6 months late

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (240.0GB/s vs 6.400GB/s)

1784 additional rendering cores

NVIDIA GeForce 8400 GS Rev. 3 's Advantages

Lower TDP (25W vs 200W)

Score

Benchmark

FP32 (float)

Radeon HD 7950 +14235%

2.867 TFLOPS

GeForce 8400 GS Rev. 3

0.02 TFLOPS

Radeon HD 7950

VS

GeForce 8400 GS Rev. 3

Graphics Card

Jan 2012

Release Date

Jul 2010

Southern Islands

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1250 MHz

Memory Clock

400 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

DDR2

384bit

Memory Bus

64bit

240.0GB/s

Bandwidth

6.400GB/s

Render Config

28

Compute Units

-

SM Count

1

1792

Shading Units

8

112

TMUs

4

32

ROPs

4

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

32 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

2.080 GPixel/s

89.60 GTexel/s

Texture Rate

2.080 GTexel/s

-

2.867 TFLOPS

FP32 (float)

19.68 GFLOPS

716.8 GFLOPS

FP64 (double)

-

Board Design

200W

TDP

25W

550 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x VGA 1x S-Video

2x 6-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

GT218

Tahiti PRO (215-0821056)

GPU Variant

8400GS-225-B1

GCN 1.0

Architecture

Tesla 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.26 billion

352 mm²

Die Size

57 mm²

Graphics Features

12 (11_1)

DirectX

11.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

1.2

5.1

Shader Model

4.1

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