GeForce GTX 275 vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which comes with clock speeds of 1126 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980		165 Watts
GeForce GTX 275		219 Watts
	Difference: 54 Watts (33%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980 should theoretically be quite a bit better than the GeForce GTX 275 in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 96992 (76%)

Texel Rate

The GeForce GTX 980 will be much (more or less 185%) faster with regards to texture filtering than the GeForce GTX 275. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 93488 (185%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980 is superior to the GeForce GTX 275, by a large margin. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 54340 (307%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends 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.