GeForce GTX 260 vs GeForce GTX 275

Intro

Compare 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 features 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 GTX 260		182 Watts
GeForce GTX 275		219 Watts
	Difference: 37 Watts (20%)

Memory Bandwidth

In theory, the GeForce GTX 275 should be 14% faster than the GeForce GTX 260 overall, because of its higher data rate. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 260		111888 MB/sec
	Difference: 15120 (14%)

Texel Rate

The GeForce GTX 275 should be quite a bit (about 37%) more effective at AF than the GeForce GTX 260. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 260		36864 Mtexels/sec
	Difference: 13776 (37%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 275 is superior to the GeForce GTX 260, though not by far. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 260		16128 Mpixels/sec
	Difference: 1596 (10%)

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 (in units of MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.