NVIDIA GeForce 8400 vs AMD Radeon HD 6990

VS

NVIDIA GeForce 8400

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 256MB VRAM GeForce 8400 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 's Advantages

Lower TDP (25W vs 375W)

AMD Radeon HD 6990 's Advantages

Released 3 years and 3 months late

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (160.0GB/s vs 8.000GB/s)

1528 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce 8400

0.021 TFLOPS

Radeon HD 6990 +12042%

2.55 TFLOPS

GeForce 8400

VS

Radeon HD 6990

Graphics Card

Dec 2007

Release Date

Mar 2011

GeForce 8

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

500 MHz

Memory Clock

1250 MHz

Memory

256MB

Memory Size

2GB

DDR2

Memory Type

GDDR5

64bit

Memory Bus

256bit

8.000GB/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)

16 KB

L2 Cache

512 KB

-

Theoretical Performance

2.160 GPixel/s

Pixel Rate

26.56 GPixel/s

2.160 GTexel/s

Texture Rate

79.68 GTexel/s

-

20.80 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

G98

GPU Name

Antilles

-

GPU Variant

Antilles XT (215-0807027)

Tesla

Architecture

TeraScale 3

TSMC

Foundry

TSMC

65 nm

Process Size

40 nm

0.21 billion

Transistors

2.64 billion

86 mm²

Die Size

389 mm²

Graphics Features

11.1 (10_0)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

1.1

CUDA

-

4.0

Shader Model

5.0

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