GeForce 8800 Ultra vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which makes use of a 28 nm design. AMD has clocked the core speed at 940 MHz. The DDR3 memory is set to run at a speed of 1000 MHz on this particular model. It features 320 SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 8800 Ultra should be 548% faster than the Radeon R5 M255 in general, because of its higher data rate. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 87680 (548%)

Texel Rate

The GeForce 8800 Ultra should be a lot (about 108%) faster with regards to texture filtering than the Radeon R5 M255. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 20368 (108%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 8800 Ultra is superior to the Radeon R5 M255, and very much so. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 7168 (95%)

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 (measured in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video 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 that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.