GeForce 8800 GTX vs Radeon HD 5570

Intro

Compare those specifications to the Radeon HD 5570, which has a clock frequency of 650 MHz and a DDR3 memory speed of 900 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It features 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
GeForce 8800 GTX		155 Watts
	Difference: 112 Watts (260%)

Memory Bandwidth

The GeForce 8800 GTX, in theory, should perform quite a bit faster than the Radeon HD 5570 overall. (explain)

GeForce 8800 GTX		86400 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 57600 (200%)

Texel Rate

The GeForce 8800 GTX should be a lot (approximately 183%) better at texture filtering than the Radeon HD 5570. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 23800 (183%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8800 GTX is superior to the Radeon HD 5570, and very much so. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 8600 (165%)

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: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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