GeForce GTS 250 512MB vs GeForce GTX 275

Intro

Compare those specifications to the GeForce GTX 275, which makes use of a 55 nm design. nVidia has clocked the core speed at 633 MHz. The GDDR3 RAM runs at a frequency of 1134 MHz on this specific model. It features 240 SPUs along with 80 TAUs and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 512MB		145 Watts
GeForce GTX 275		219 Watts
	Difference: 74 Watts (51%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 will be 80% quicker than the GeForce GTS 250 512MB overall, due to its greater data rate. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 56608 (80%)

Texel Rate

The GeForce GTX 275 is a little bit (more or less 7%) more effective at texture filtering than the GeForce GTS 250 512MB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 3408 (7%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 275 is superior to the GeForce GTS 250 512MB, by far. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 5916 (50%)

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 information (in units of MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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