GeForce GTX 295 vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which features core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 295 should in theory perform a lot faster than the Radeon R5 M255 in general. (explain)

GeForce GTX 295		223776 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 207776 (1299%)

Texel Rate

The GeForce GTX 295 should be quite a bit (about 390%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 73360 (390%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 295 is a better choice, by a large margin. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 24736 (329%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.