NVIDIA GeForce 8800 Ultra vs AMD Radeon HD 6850

VS

NVIDIA GeForce 8800 Ultra

AMD Radeon HD 6850

We compared two Desktop platform GPUs: 768MB VRAM GeForce 8800 Ultra and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 's Advantages

Released 3 years and 5 months late

More VRAM (1024GB vs 768GB)

Larger VRAM bandwidth (128.0GB/s vs 103.7GB/s)

832 additional rendering cores

Lower TDP (127W vs 171W)

Score

Benchmark

FP32 (float)

GeForce 8800 Ultra

0.387 TFLOPS

Radeon HD 6850 +284%

1.488 TFLOPS

GeForce 8800 Ultra

VS

Radeon HD 6850

Graphics Card

May 2007

Release Date

Oct 2010

GeForce 8

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1080 MHz

Memory Clock

1000 MHz

Memory

768MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

384bit

Memory Bus

256bit

103.7GB/s

Bandwidth

128.0GB/s

Render Config

-

Compute Units

12

16

SM Count

-

128

Shading Units

960

32

TMUs

48

24

ROPs

32

-

L1 Cache

8 KB (per CU)

96 KB

L2 Cache

512 KB

-

Theoretical Performance

14.69 GPixel/s

Pixel Rate

24.80 GPixel/s

39.17 GTexel/s

Texture Rate

37.20 GTexel/s

-

387.1 GFLOPS

FP32 (float)

1488 GFLOPS

-

Board Design

171W

TDP

127W

450 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

G80

GPU Name

Barts

G80-450-A3

GPU Variant

Barts PRO (215-0798006)

Tesla

Architecture

TeraScale 2

TSMC

Foundry

TSMC

90 nm

Process Size

40 nm

0.681 billion

Transistors

1.7 billion

484 mm²

Die Size

255 mm²

Graphics Features

11.1 (10_0)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1 (1.0)

OpenCL

1.2

N/A

Vulkan

N/A

1.0

CUDA

-

4.0

Shader Model

5.0

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