GeForce GT 320 vs GeForce GTX 275

Intro

Compare those specifications to the GeForce GTX 275, which features GPU core speed of 633 MHz, and 896 MB of GDDR3 RAM set to run at 1134 MHz through a 448-bit bus. It also features 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 275		219 Watts
	Difference: 176 Watts (409%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should be quite a bit faster than the GeForce GT 320 in general. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 101728 (402%)

Texel Rate

The GeForce GTX 275 should be a lot (more or less 291%) better at AF than the GeForce GT 320. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 37680 (291%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is the winner, and very much so. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 13404 (310%)

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 (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high 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 by the core speed of the chip. The better this number, the better the 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 most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.