Geforce GTX 770 vs Radeon HD 5870

Intro

Compare those specs to the Radeon HD 5870, which comes with GPU clock speed of 850 MHz, and 1024 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also is made up of 1600(320x5) Stream Processors, 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

The Geforce GTX 770 should in theory be much 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 will be much (about 97%) better at 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 a lot (approximately 23%) more effective at 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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.