GeForce GTX 260 216SP 55 nm vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which comes with a core clock frequency of 940 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit bus, and uses a 28 nm design. It is comprised of 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 260 216SP 55 nm should theoretically be a lot better than the Radeon R5 M255 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 95888 (599%)

Texel Rate

The GeForce GTX 260 216SP 55 nm should be quite a bit (about 121%) better at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 22672 (121%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 260 216SP 55 nm is the winner, by a large margin. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 8608 (114%)

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 maximum amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of 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.