GeForce 8500 GT vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which has GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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

The Radeon HD 5770, in theory, should be quite a bit 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 is much (approximately 844%) faster with regards to AF than the GeForce 8500 GT. (explain)

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

Pixel Rate

The Radeon HD 5770 is much (about 656%) better at anti-aliasing than the GeForce 8500 GT, and also will be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.