GeForce 8800 GTS (G92) vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which features a clock speed of 940 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce 8800 GTS (G92) should theoretically be a lot superior to the Radeon R5 M255 in general. (explain)

GeForce 8800 GTS (G92)		62080 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 46080 (288%)

Texel Rate

The GeForce 8800 GTS (G92) should be much (about 121%) faster with regards to AF than the Radeon R5 M255. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 22800 (121%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 8800 GTS (G92) is the winner, and very much so. (explain)

GeForce 8800 GTS (G92)		10400 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 2880 (38%)

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 information (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.