GeForce GT 220 GDDR3 vs Radeon R7 250

Intro

Compare all of that to the Radeon R7 250, which has core clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 memory. It features 384 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon R7 250		65 Watts
	Difference: 7 Watts (12%)

Memory Bandwidth

The Radeon R7 250 should theoretically be a lot faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon R7 250		73600 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 41216 (127%)

Texel Rate

The Radeon R7 250 is a lot (about 140%) better at AF than the GeForce GT 220 GDDR3. (explain)

Radeon R7 250		24000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 14000 (140%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250 is superior to the GeForce GT 220 GDDR3, and very much so. (explain)

Radeon R7 250		8000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 3000 (60%)

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 information (in units of MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 are applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.