GeForce GTS 250 512MB vs GeForce GTX 1080

Intro

Compare all that to the GeForce GTX 1080, which has core clock speeds of 1607 MHz on the GPU, and 1251 MHz on the 8192 MB of GDDR5X memory. It features 2560 SPUs along with 160 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 512MB		145 Watts
GeForce GTX 1080		180 Watts
	Difference: 35 Watts (24%)

Memory Bandwidth

Theoretically, the GeForce GTX 1080 should perform quite a bit faster than the GeForce GTS 250 512MB overall. (explain)

GeForce GTX 1080		327680 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 257280 (365%)

Texel Rate

The GeForce GTX 1080 will be much (about 444%) faster with regards to AF than the GeForce GTS 250 512MB. (explain)

GeForce GTX 1080		257120 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 209888 (444%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 1080 is the winner, by a large margin. (explain)

GeForce GTX 1080		102848 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 91040 (771%)

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

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.