Geforce GTX 680 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which comes with a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Geforce GTX 680		195 Watts
	Difference: 87 Watts (81%)

Memory Bandwidth

The Geforce GTX 680 should theoretically be much faster than the Radeon HD 5770 in general. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 115456 (150%)

Texel Rate

The Geforce GTX 680 will be a lot (about 279%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 94768 (279%)

Pixel Rate

The Geforce GTX 680 should be much (more or less 137%) faster with regards to FSAA than the Radeon HD 5770, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 18592 (137%)

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 largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units 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 maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.