GeForce GTX 950 vs Radeon R5 M255

Intro

Compare that 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 features 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 950 should be quite a bit faster than the Radeon R5 M255 overall. (explain)

GeForce GTX 950		105728 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 89728 (561%)

Texel Rate

The GeForce GTX 950 should be quite a bit (about 161%) better at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 950		49152 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 30352 (161%)

Pixel Rate

The GeForce GTX 950 will be much (about 336%) more effective at AA than the Radeon R5 M255, and able to handle higher resolutions more effectively. (explain)

GeForce GTX 950		32768 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 25248 (336%)

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 information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses 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 can be applied per second. This number is calculated 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.