GeForce GT 320 vs GeForce GTX 275

Intro

Compare all of that to the GeForce GTX 275, which has GPU clock speed of 633 MHz, and 896 MB of GDDR3 memory 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

Hide Graphs

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, the GeForce GTX 275 should perform a lot 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 (about 291%) faster with regards to anisotropic 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 much (approximately 310%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and also will be capable of handling higher screen resolutions while still performing well. (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 max amount of data (measured in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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