GeForce 8500 GT vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
Radeon HD 5770		108 Watts
	Difference: 63 Watts (140%)

Memory Bandwidth

In theory, the Radeon HD 5770 should perform much faster than the GeForce 8500 GT in general. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 64000 (500%)

Texel Rate

The Radeon HD 5770 will be much (approximately 844%) faster with regards to anisotropic filtering than the GeForce 8500 GT. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 30400 (844%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5770 is a better choice, by a large margin. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 11800 (656%)

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 data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.