GeForce GTX 275 vs GeForce GTX 590

Intro

Compare all of that to the GeForce GTX 590, which features clock speeds of 607 MHz on the GPU, and 855 MHz on the 1536 MB of GDDR5 RAM. It features 512 SPUs as well as 64 TAUs and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275		219 Watts
GeForce GTX 590		365 Watts
	Difference: 146 Watts (67%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 590 is 159% faster than the GeForce GTX 275 overall, because of its greater data rate. (explain)

GeForce GTX 590		328320 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 201312 (159%)

Texel Rate

The GeForce GTX 590 should be quite a bit (about 53%) faster with regards to AF than the GeForce GTX 275. (explain)

GeForce GTX 590		77696 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 27056 (53%)

Pixel Rate

The GeForce GTX 590 should be quite a bit (approximately 229%) more effective at anti-aliasing than the GeForce GTX 275, and also will be able to handle higher resolutions better. (explain)

GeForce GTX 590		58272 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 40548 (229%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, 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 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 Render Output Units 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.