GeForce GTS 250 512MB vs GeForce GTX 570

Intro

Compare all of that to the GeForce GTX 570, which features a core clock frequency of 732 MHz and a GDDR5 memory speed of 950 MHz. It also makes use of a 320-bit bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 60 Texture Address Units, 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

Theoretically speaking, the GeForce GTX 570 should be 116% faster than the GeForce GTS 250 512MB in general, because of its greater data rate. (explain)

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

Texel Rate

The GeForce GTS 250 512MB will be a small bit (more or less 8%) faster with regards to 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

If running with a high resolution is important to you, then the GeForce GTX 570 is a better choice, by a large margin. (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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.