AMD Radeon HD 6790 vs NVIDIA GeForce 8800 Ultra

VS

AMD Radeon HD 6790

NVIDIA GeForce 8800 Ultra

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 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 6790 's Advantages

Released 3 years and 11 months late

More VRAM (1024GB vs 768GB)

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

672 additional rendering cores

Lower TDP (150W vs 171W)

Score

Benchmark

FP32 (float)

Radeon HD 6790 +247%

1.344 TFLOPS

GeForce 8800 Ultra

0.387 TFLOPS

Radeon HD 6790

VS

GeForce 8800 Ultra

Graphics Card

Apr 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

-

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

10

Compute Units

-

SM Count

16

800

Shading Units

128

40

TMUs

32

16

ROPs

24

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

96 KB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

14.69 GPixel/s

33.60 GTexel/s

Texture Rate

39.17 GTexel/s

-

1344 GFLOPS

FP32 (float)

387.1 GFLOPS

-

Board Design

150W

TDP

171W

450 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Barts

GPU Name

G80

Barts LE (215-0798002)

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

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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