GeForce 8800 GTS (G80) 320MB vs Radeon HD 5570

Intro

Compare that to the Radeon HD 5570, which comes with a GPU core clock speed of 650 MHz, and 512 MB of DDR3 memory set to run at 900 MHz through a 128-bit bus. It also is made up of 400(80x5) Stream Processors, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 100 Watts (233%)

Memory Bandwidth

In theory, the GeForce 8800 GTS (G80) 320MB should be a lot faster than the Radeon HD 5570 in general. (explain)

GeForce 8800 GTS (G80) 320MB		63360 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 34560 (120%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (more or less 89%) better at anisotropic filtering than the Radeon HD 5570. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 11624 (89%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (about 97%) more effective at full screen anti-aliasing than the Radeon HD 5570, and also should be able to handle higher resolutions better. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 5060 (97%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.