Geforce GTX 770 vs Radeon HD 5970

Intro

Compare those specs to the Radeon HD 5970, which comes with a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is comprised of 1600 SPUs, 160 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770		230 Watts
Radeon HD 5970		294 Watts
	Difference: 64 Watts (28%)

Memory Bandwidth

Performance-wise, the Radeon HD 5970 should in theory be a bit better than the Geforce GTX 770 overall. (explain)

Radeon HD 5970		256000 MB/sec
Geforce GTX 770		224384 MB/sec
	Difference: 31616 (14%)

Texel Rate

The Radeon HD 5970 should be much (approximately 73%) better at anisotropic filtering than the Geforce GTX 770. (explain)

Radeon HD 5970		232000 Mtexels/sec
Geforce GTX 770		133888 Mtexels/sec
	Difference: 98112 (73%)

Pixel Rate

The Radeon HD 5970 is quite a bit (more or less 177%) faster with regards to FSAA than the Geforce GTX 770, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5970		92800 Mpixels/sec
Geforce GTX 770		33472 Mpixels/sec
	Difference: 59328 (177%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.