AMD Radeon HD 6870 vs NVIDIA GeForce 8400

VS

AMD Radeon HD 6870

NVIDIA GeForce 8400

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 256MB VRAM GeForce 8400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 's Advantages

Released 2 years and 10 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (134.4GB/s vs 8.000GB/s)

1112 additional rendering cores

NVIDIA GeForce 8400 's Advantages

Lower TDP (25W vs 151W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 +9500%

2.016 TFLOPS

GeForce 8400

0.021 TFLOPS

Radeon HD 6870

VS

GeForce 8400

Graphics Card

Oct 2010

Release Date

Dec 2007

Northern Islands

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

500 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

8.000GB/s

Render Config

14

Compute Units

-

SM Count

1

1120

Shading Units

8

56

TMUs

4

32

ROPs

4

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

16 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

2.160 GPixel/s

50.40 GTexel/s

Texture Rate

2.160 GTexel/s

-

2.016 TFLOPS

FP32 (float)

20.80 GFLOPS

-

Board Design

151W

TDP

25W

450 W

Suggested PSU

200 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 1x VGA 1x S-Video

2x 6-pin

Power Connectors

None

Graphics Processor

Barts

GPU Name

G98

Barts XT (215-0798000)

GPU Variant

-

TeraScale 2

Architecture

Tesla

TSMC

Foundry

TSMC

40 nm

Process Size

65 nm

1.7 billion

Transistors

0.21 billion

255 mm²

Die Size

86 mm²

Graphics Features

11.2 (11_0)

DirectX

11.1 (10_0)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

1.1

5.0

Shader Model

4.0

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