GeForce GTS 150 vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which features a GPU core clock speed of 940 MHz, and 2048 MB of DDR3 memory running at 1000 MHz through a 64-bit bus. It also features 320 Stream Processors, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTS 150 should theoretically perform quite a bit faster than the Radeon R5 M255 overall. (explain)

GeForce GTS 150		32000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The GeForce GTS 150 is quite a bit (more or less 152%) better at texture filtering than the Radeon R5 M255. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 28560 (152%)

Pixel Rate

The GeForce GTS 150 will be much (more or less 57%) more effective at full screen anti-aliasing than the Radeon R5 M255, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTS 150		11840 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 4320 (57%)

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 largest amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.