GeForce 8800 GT 1GB vs GeForce GT 220 GDDR3

Intro

Compare all that to the GeForce GT 220 GDDR3, which comes with a core clock speed of 625 MHz and a GDDR3 memory frequency of 1012 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 48 SPUs, 16 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
GeForce 8800 GT 1GB		105 Watts
	Difference: 47 Watts (81%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GT 1GB should theoretically be much better than the GeForce GT 220 GDDR3 overall. (explain)

GeForce 8800 GT 1GB		57600 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 25216 (78%)

Texel Rate

The GeForce 8800 GT 1GB is quite a bit (approximately 236%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce 8800 GT 1GB		33600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 23600 (236%)

Pixel Rate

The GeForce 8800 GT 1GB will be much (approximately 92%) better at FSAA than the GeForce GT 220 GDDR3, and should be able to handle higher resolutions better. (explain)

GeForce 8800 GT 1GB		9600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 4600 (92%)

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 data (counted in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.