Geforce GTX 770 vs Radeon HD 5870

Intro

Compare all of that to the Radeon HD 5870, which features a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is comprised of 1600(320x5) SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

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

The Geforce GTX 770 should in theory be a lot faster than the Radeon HD 5870 in general. (explain)

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

Texel Rate

The Geforce GTX 770 is much (approximately 97%) faster with regards to AF than the Radeon HD 5870. (explain)

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

Pixel Rate

The Geforce GTX 770 will be much (about 23%) faster with regards to anti-aliasing than the Radeon HD 5870, and also will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.