GeForce 8800 GTS (G80) 320MB vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which comes with a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

The Radeon HD 5770 should theoretically perform a lot faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 13440 (21%)

Texel Rate

The Radeon HD 5770 is a lot (more or less 38%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 9376 (38%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5770 is superior to the GeForce 8800 GTS (G80) 320MB, by far. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 3340 (33%)

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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.