GeForce GTX 295 vs Radeon R5 M255

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 295 should be a lot faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The GeForce GTX 295 will be much (more or less 390%) more effective at AF than the Radeon R5 M255. (explain)

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

Pixel Rate

The GeForce GTX 295 is quite a bit (more or less 329%) more effective at anti-aliasing than the Radeon R5 M255, and will be able to handle higher screen resolutions without losing too much performance. (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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 are processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.