GeForce 8800 Ultra vs Radeon R5 M255

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 8800 Ultra, in theory, should perform a lot faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The GeForce 8800 Ultra will be much (approximately 108%) better at AF 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 a high screen resolution is important to you, then the GeForce 8800 Ultra is the winner, by far. (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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.