AMD Radeon HD 6870 X2 vs NVIDIA GeForce 8800 Ultra

VS

AMD Radeon HD 6870 X2 NVIDIA GeForce 8800 Ultra

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 768MB VRAM GeForce 8800 Ultra 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 4 years and 2 months late

More VRAM (1024GB vs 768GB)

Larger VRAM bandwidth (134.4GB/s vs 103.7GB/s)

992 additional rendering cores

NVIDIA GeForce 8800 Ultra 's Advantages

Lower TDP (171W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2 +420%

2.016 TFLOPS

GeForce 8800 Ultra

0.387 TFLOPS

Radeon HD 6870 X2

VS

GeForce 8800 Ultra

Graphics Card

Jul 2011

Release Date

May 2007

Northern Islands

Generation

GeForce 8

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

1080 MHz

Memory

1024MB

Memory Size

768MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

384bit

134.4GB/s

Bandwidth

103.7GB/s

Render Config

-

SM Count

16

14

Compute Units

-

1120

Shading Units

128

56

TMUs

32

ROPs

24

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

96 KB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

14.69 GPixel/s

50.40 GTexel/s

Texture Rate

39.17 GTexel/s

-

FP16 (half)

-

2.016 TFLOPS

FP32 (float)

387.1 GFLOPS

-

FP64 (double)

-

Graphics Processor

Barts

GPU Name

G80

Barts XT (215-0798000)

GPU Variant

G80-450-A3

TeraScale 2

Architecture

Tesla

TSMC

Foundry

TSMC

40 nm

Process Size

90 nm

1.7 billion

Transistors

0.681 billion

255 mm²

Die Size

484 mm²

Board Design

300W

TDP

171W

700 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

-

Power Connectors

2x 6-pin

Graphics Features

11.2 (11_0)

DirectX

11.1 (10_0)

4.4

OpenGL

3.3

1.2

OpenCL

1.1 (1.0)

N/A

Vulkan

N/A

-

CUDA

1.0

5.0

Shader Model

4.0

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