GeForce GT 220 GDDR3 vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which uses a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this particular card. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 3 Watts (5%)

Memory Bandwidth

The Radeon HD 7750 should in theory perform a lot faster than the GeForce GT 220 GDDR3 overall. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 39616 (122%)

Texel Rate

The Radeon HD 7750 will be quite a bit (more or less 156%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 15600 (156%)

Pixel Rate

The Radeon HD 7750 will be quite a bit (approximately 156%) more effective at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 7800 (156%)

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 past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number is worked out by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.