GeForce GTX 275 vs GeForce GTX 280

Intro

Compare those specifications to the GeForce GTX 280, which has core clock speeds of 602 MHz on the GPU, and 1107 MHz on the 1024 MB of GDDR3 RAM. It features 240 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275		219 Watts
GeForce GTX 280		236 Watts
	Difference: 17 Watts (8%)

Memory Bandwidth

The GeForce GTX 280 should theoretically be just a bit faster than the GeForce GTX 275 in general. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 14688 (12%)

Texel Rate

The GeForce GTX 275 is a small bit (about 5%) faster with regards to anisotropic filtering than the GeForce GTX 280. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 2480 (5%)

Pixel Rate

The GeForce GTX 280 should be just a bit (more or less 9%) better at AA than the GeForce GTX 275, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 280		19264 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 1540 (9%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 applied per second. This number is calculated by multiplying the total texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.