NVIDIA GeForce 8400 GS Rev. 3 vs AMD Radeon HD 6990

VS

NVIDIA GeForce 8400 GS Rev. 3

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS Rev. 3 and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 8400 GS Rev. 3 's Advantages

Lower TDP (25W vs 375W)

AMD Radeon HD 6990 's Advantages

Released 8 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (160.0GB/s vs 6.400GB/s)

1528 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400 GS Rev. 3

0.02 TFLOPS

Radeon HD 6990 +12650%

2.55 TFLOPS

GeForce 8400 GS Rev. 3

VS

Radeon HD 6990

Graphics Card

Jul 2010

Release Date

Mar 2011

GeForce 8

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

400 MHz

Memory Clock

1250 MHz

Memory

512MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

256bit

6.400GB/s

Bandwidth

160.0GB/s

Render Config

-

Compute Units

24

1

SM Count

-

8

Shading Units

1536

4

TMUs

96

4

ROPs

32

-

L1 Cache

8 KB (per CU)

32 KB

L2 Cache

512 KB

-

Theoretical Performance

2.080 GPixel/s

Pixel Rate

26.56 GPixel/s

2.080 GTexel/s

Texture Rate

79.68 GTexel/s

-

19.68 GFLOPS

FP32 (float)

2.550 TFLOPS

-

FP64 (double)

637.4 GFLOPS

Board Design

25W

TDP

375W

200 W

Suggested PSU

750 W

1x DVI 1x VGA 1x S-Video

Outputs

1x DVI 4x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

GT218

GPU Name

Antilles

8400GS-225-B1

GPU Variant

Antilles XT (215-0807027)

Tesla 2.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.26 billion

Transistors

2.64 billion

57 mm²

Die Size

389 mm²

Graphics Features

11.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

1.2

CUDA

-

4.1

Shader Model

5.0

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