GeForce GT 320 vs GeForce GTX 275

Intro

Compare all of that to the GeForce GTX 275, which comes with a GPU core clock speed of 633 MHz, and 896 MB of GDDR3 RAM set to run at 1134 MHz through a 448-bit bus. It also is made up of 240 SPUs, 80 Texture Address Units, and 28 Raster Operation Units.

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

In theory, the GeForce GTX 275 should perform much faster than the GeForce GT 320 overall. (explain)

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

Texel Rate

The GeForce GTX 275 should be much (more or less 291%) better at texture filtering than the GeForce GT 320. (explain)

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

Pixel Rate

The GeForce GTX 275 will be quite a bit (more or less 310%) better at anti-aliasing than the GeForce GT 320, and also able to handle higher resolutions more effectively. (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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.