AMD Radeon HD 6870 X2 vs NVIDIA GeForce 8400 GS PCI

VS

AMD Radeon HD 6870 X2 NVIDIA GeForce 8400 GS PCI

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 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 6870 X2 's Advantages

Released 3 years and 7 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (134.4GB/s vs 5.328GB/s)

1112 additional rendering cores

NVIDIA GeForce 8400 GS PCI 's Advantages

Lower TDP (25W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +9063%

2.016 TFLOPS

GeForce 8400 GS PCI

0.022 TFLOPS

Radeon HD 6870 X2

VS

GeForce 8400 GS PCI

Graphics Card

Jul 2011

Release Date

Dec 2007

Northern Islands

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCI

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

333 MHz

Memory

1024MB

Memory Size

512MB

GDDR5

Memory Type

DDR2

256bit

Memory Bus

64bit

134.4GB/s

Bandwidth

5.328GB/s

Render Config

-

SM Count

1

14

Compute Units

-

1120

Shading Units

8

56

TMUs

4

32

ROPs

4

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

16 KB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

2.268 GPixel/s

50.40 GTexel/s

Texture Rate

2.268 GTexel/s

-

FP16 (half)

-

2.016 TFLOPS

FP32 (float)

22.40 GFLOPS

-

FP64 (double)

-

Graphics Processor

Barts

GPU Name

G98

Barts XT (215-0798000)

GPU Variant

G98-400-U2

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

Board Design

300W

TDP

25W

700 W

Suggested PSU

200 W

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

Outputs

1x S-Video 1x DMS-59

-

Power Connectors

None

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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