GeForce GT 220 GDDR3 vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which comes with a clock speed of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M265X is 122% faster than the GeForce GT 220 GDDR3 overall, due to its higher bandwidth. (explain)

Radeon R9 M265X		72000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 39616 (122%)

Texel Rate

The Radeon R9 M265X should be much (approximately 130%) faster with regards to texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon R9 M265X		23000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 13000 (130%)

Pixel Rate

The Radeon R9 M265X will be quite a bit (more or less 84%) more effective at AA than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M265X		9200 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 4200 (84%)

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 data (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.