GeForce GTS 250 1GB vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which features core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTS 250 1GB should theoretically be quite a bit better than the Radeon R5 M255 in general. (explain)

GeForce GTS 250 1GB		70400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 54400 (340%)

Texel Rate

The GeForce GTS 250 1GB should be quite a bit (more or less 151%) better at texture filtering than the Radeon R5 M255. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 28432 (151%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTS 250 1GB is the winner, by a large margin. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 4288 (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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over 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 memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number 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 number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.