GeForce GTS 250 1GB vs GeForce GTX 570

Intro

Compare those specs to the GeForce GTX 570, which has GPU core speed of 732 MHz, and 1280 MB of GDDR5 RAM set to run at 950 MHz through a 320-bit bus. It also features 480 Stream Processors, 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 1GB		145 Watts
GeForce GTX 570		219 Watts
	Difference: 74 Watts (51%)

Memory Bandwidth

Theoretically, the GeForce GTX 570 should be much faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 570		152000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 81600 (116%)

Texel Rate

The GeForce GTS 250 1GB will be a bit (approximately 8%) faster with regards to anisotropic filtering than the GeForce GTX 570. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 3312 (8%)

Pixel Rate

The GeForce GTX 570 will be much (more or less 148%) more effective at full screen anti-aliasing than the GeForce GTS 250 1GB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce GTS 250 1GB		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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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.