Geforce GTX 770 vs Radeon HD 5870

Intro

Compare those specifications to the Radeon HD 5870, which has GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is made up of 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870		188 Watts
Geforce GTX 770		230 Watts
	Difference: 42 Watts (22%)

Memory Bandwidth

In theory, the Geforce GTX 770 should perform a lot faster than the Radeon HD 5870 overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 5870		153600 MB/sec
	Difference: 70784 (46%)

Texel Rate

The Geforce GTX 770 should be quite a bit (more or less 97%) more effective at anisotropic filtering than the Radeon HD 5870. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 5870		68000 Mtexels/sec
	Difference: 65888 (97%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 770 is a better choice, by a large margin. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 5870		27200 Mpixels/sec
	Difference: 6272 (23%)

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 max amount of data (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.