GeForce 8800 GTS (G80) 320MB vs Radeon HD 5670

Intro

Compare those specs to the Radeon HD 5670, which uses a 40 nm design. ATi has clocked the core speed at 775 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Battlefield Bad Company 2

Settings:	High Quality
AA:	4x
AF:	8x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

Radeon HD 5670		19 FPS
GeForce 8800 GTS (G80) 320MB		6 FPS
	Difference: 13 FPS (217%)

Left4Dead 2

Settings:	Very High
AA:	8x
AF:	16x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

Radeon HD 5670		49 FPS
GeForce 8800 GTS (G80) 320MB		27 FPS
	Difference: 22 FPS (81%)

Mass Effect 2

Settings:	Maximum Quality
AA:	none
AF:	8x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

Radeon HD 5670		57 FPS
GeForce 8800 GTS (G80) 320MB		52 FPS
	Difference: 5 FPS (10%)

Supreme Commander 2

Settings:	High
AA:	8x
AF:	16x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

Radeon HD 5670		37 FPS
GeForce 8800 GTS (G80) 320MB		22 FPS
	Difference: 15 FPS (68%)

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Radeon HD 5670 wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the Radeon HD 5670 wins overall, by 55 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

Radeon HD 5670		162 FPS
GeForce 8800 GTS (G80) 320MB		107 FPS
	Difference: 55 FPS (51%)

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 82 Watts (134%)

Memory Bandwidth

The Radeon HD 5670 should in theory be a small bit faster than the GeForce 8800 GTS (G80) 320MB overall. (explain)

Radeon HD 5670		64000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 640 (1%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be much (approximately 59%) better at AF than the Radeon HD 5670. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9124 (59%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be quite a bit (about 65%) more effective at full screen anti-aliasing than the Radeon HD 5670, and should be capable of handling higher resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 4060 (65%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.