GeForce GT 220 GDDR3 vs Radeon R5 M255

Intro

Compare those specs 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 along with 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GT 220 GDDR3 is 102% quicker than the Radeon R5 M255 overall, because of its higher data rate. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 16384 (102%)

Texel Rate

The Radeon R5 M255 is a lot (about 88%) better at AF than the GeForce GT 220 GDDR3. (explain)

Radeon R5 M255		18800 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 8800 (88%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R5 M255 is the winner, and very much so. (explain)

Radeon R5 M255		7520 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 2520 (50%)

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 (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video 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 card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the maximum fill rate.