GeForce GTS 250 512MB vs Radeon R5 M255

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 512MB will be 340% faster than the Radeon R5 M255 overall, because of its greater bandwidth. (explain)

GeForce GTS 250 512MB		70400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 54400 (340%)

Texel Rate

The GeForce GTS 250 512MB is a lot (more or less 151%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 28432 (151%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 250 512MB is superior to the Radeon R5 M255, and very much so. (explain)

GeForce GTS 250 512MB		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 maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.