GeForce GTX 275 vs Radeon HD 5570

Intro

Compare those specifications to the Radeon HD 5570, which comes with a clock speed 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 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
GeForce GTX 275		219 Watts
	Difference: 176 Watts (409%)

Memory Bandwidth

The GeForce GTX 275, in theory, should be much faster than the Radeon HD 5570 overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 5570		28800 MB/sec
	Difference: 98208 (341%)

Texel Rate

The GeForce GTX 275 is much (about 290%) better at anisotropic filtering than the Radeon HD 5570. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 37640 (290%)

Pixel Rate

The GeForce GTX 275 should be much (approximately 241%) better at full screen anti-aliasing than the Radeon HD 5570, and will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 12524 (241%)

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 information (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video 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 could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.