GeForce GT 220 GDDR3 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features GPU clock speed of 1000 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also features 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon R9 390 8G		275 Watts
	Difference: 217 Watts (374%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should theoretically be a lot superior to the GeForce GT 220 GDDR3 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 351616 (1086%)

Texel Rate

The Radeon R9 390 8G should be a lot (about 1500%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 150000 (1500%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 390 8G is the winner, and very much so. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 59000 (1180%)

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 information (counted in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the 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 most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.