GeForce GT 220 GDDR3 vs Radeon R9 270

Intro

Compare those specs to the Radeon R9 270, which has GPU core speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1400 MHz through a 256-bit bus. It also is comprised of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon R9 270		150 Watts
	Difference: 92 Watts (159%)

Memory Bandwidth

The Radeon R9 270, in theory, should perform much faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 146816 (453%)

Texel Rate

The Radeon R9 270 will be a lot (approximately 620%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 62000 (620%)

Pixel Rate

The Radeon R9 270 will be a lot (about 476%) more effective at anti-aliasing than the GeForce GT 220 GDDR3, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 23800 (476%)

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 (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.