Geforce GTX 770 vs Radeon HD 5970

Intro

Compare all that to the Radeon HD 5970, which features GPU clock speed of 725 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also features 1600 Stream Processors, 160 Texture Address Units, and 64 Raster Operation Units.

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

Theoretically speaking, the Radeon HD 5970 should be a bit faster than the Geforce GTX 770 in general. (explain)

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

Texel Rate

The Radeon HD 5970 is a lot (approximately 73%) faster with regards to texture filtering than the Geforce GTX 770. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 5970 is a better choice, by far. (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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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