GeForce GTX 275 vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which has a core clock speed of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is comprised of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
GeForce GTX 275		219 Watts
	Difference: 24 Watts (12%)

Memory Bandwidth

The Geforce GTX 680 should theoretically perform much faster than the GeForce GTX 275 overall. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 65248 (51%)

Texel Rate

The Geforce GTX 680 is much (approximately 154%) faster with regards to texture filtering than the GeForce GTX 275. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 78128 (154%)

Pixel Rate

The Geforce GTX 680 will be a lot (approximately 82%) better at anti-aliasing than the GeForce GTX 275, and able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 14468 (82%)

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 information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should 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 texture map elements (texels) that are applied in one 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.