GeForce 8500 GT vs GeForce GT 220 GDDR3

Intro

Compare those specifications to the GeForce GT 220 GDDR3, which features a clock speed of 625 MHz and a GDDR3 memory frequency of 1012 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It features 48 SPUs, 16 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 13 Watts (29%)

Memory Bandwidth

Performance-wise, the GeForce GT 220 GDDR3 should theoretically be a lot better than the GeForce 8500 GT overall. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 19584 (153%)

Texel Rate

The GeForce GT 220 GDDR3 should be much (approximately 178%) better at AF than the GeForce 8500 GT. (explain)

GeForce GT 220 GDDR3		10000 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 6400 (178%)

Pixel Rate

The GeForce GT 220 GDDR3 should be a lot (approximately 178%) more effective at full screen anti-aliasing than the GeForce 8500 GT, and will be capable of handling higher resolutions more effectively. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 3200 (178%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units of the card 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 video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.