GeForce GTX 275 vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which comes with core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should theoretically be a lot better than the Radeon R5 M255 overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 111008 (694%)

Texel Rate

The GeForce GTX 275 should be much (approximately 169%) better at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 31840 (169%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is a better choice, and very much so. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 10204 (136%)

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 maximum amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.