GeForce GTS 250 1GB vs GeForce GTX 560 Ti 448

Intro

Compare those specifications to the GeForce GTX 560 Ti 448, which makes use of a 40 nm design. nVidia has clocked the core frequency at 732 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this model. It features 448 SPUs as well as 56 TAUs and 40 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 65 Watts (45%)

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should be quite a bit faster than the GeForce GTS 250 1GB overall. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 73600 (105%)

Texel Rate

The GeForce GTS 250 1GB should be a bit (about 15%) more effective at AF than the GeForce GTX 560 Ti 448. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 6240 (15%)

Pixel Rate

The GeForce GTX 560 Ti 448 is a lot (more or less 148%) faster with regards to anti-aliasing than the GeForce GTS 250 1GB, and should be able to handle higher resolutions better. (explain)

GeForce GTX 560 Ti 448		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: Bandwidth is the max amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high 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 of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.