NVIDIA GeForce 8800 Ultra vs AMD Radeon HD 6450

VS

NVIDIA GeForce 8800 Ultra

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 768MB VRAM GeForce 8800 Ultra and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce 8800 Ultra 's Advantages

More VRAM (768GB vs 512GB)

Larger VRAM bandwidth (103.7GB/s vs 25.60GB/s)

AMD Radeon HD 6450 's Advantages

Released 3 years and 11 months late

32 additional rendering cores

Lower TDP (18W vs 171W)

Score

Benchmark

FP32 (float)

GeForce 8800 Ultra +93%

0.387 TFLOPS

Radeon HD 6450

0.2 TFLOPS

GeForce 8800 Ultra

VS

Radeon HD 6450

Graphics Card

May 2007

Release Date

Apr 2011

GeForce 8

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1080 MHz

Memory Clock

800 MHz

Memory

768MB

Memory Size

512MB

GDDR3

Memory Type

GDDR5

384bit

Memory Bus

64bit

103.7GB/s

Bandwidth

25.60GB/s

Render Config

-

Compute Units

2

16

SM Count

-

128

Shading Units

160

32

TMUs

8

24

ROPs

4

-

L1 Cache

8 KB (per CU)

96 KB

L2 Cache

128 KB

-

Theoretical Performance

14.69 GPixel/s

Pixel Rate

2.500 GPixel/s

39.17 GTexel/s

Texture Rate

5.000 GTexel/s

-

387.1 GFLOPS

FP32 (float)

200.0 GFLOPS

-

Board Design

171W

TDP

18W

450 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 6-pin

Power Connectors

None

Graphics Processor

G80

GPU Name

Caicos

G80-450-A3

GPU Variant

Caicos PRO

Tesla

Architecture

TeraScale 2

TSMC

Foundry

TSMC

90 nm

Process Size

40 nm

0.681 billion

Transistors

0.37 billion

484 mm²

Die Size

67 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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