GeForce GTS 250 512MB vs GeForce GTX 570

Intro

Compare those specifications to the GeForce GTX 570, which comes with a GPU core clock speed of 732 MHz, and 1280 MB of GDDR5 RAM set to run at 950 MHz through a 320-bit bus. It also is comprised of 480 Stream Processors, 60 TAUs, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 512MB		145 Watts
GeForce GTX 570		219 Watts
	Difference: 74 Watts (51%)

Memory Bandwidth

In theory, the GeForce GTX 570 should be a lot faster than the GeForce GTS 250 512MB overall. (explain)

GeForce GTX 570		152000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 81600 (116%)

Texel Rate

The GeForce GTS 250 512MB should be a bit (about 8%) better at anisotropic filtering than the GeForce GTX 570. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 3312 (8%)

Pixel Rate

The GeForce GTX 570 should be much (about 148%) faster with regards to AA than the GeForce GTS 250 512MB, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 17472 (148%)

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 max amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.