GeForce GTS 250 1GB vs GeForce GTX 275

Intro

Compare all of that to the GeForce GTX 275, which comes with GPU core speed of 633 MHz, and 896 MB of GDDR3 memory set to run at 1134 MHz through a 448-bit bus. It also is made up of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
GeForce GTX 275		219 Watts
	Difference: 74 Watts (51%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should perform quite a bit faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 56608 (80%)

Texel Rate

The GeForce GTX 275 is a little bit (about 7%) better at AF than the GeForce GTS 250 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 3408 (7%)

Pixel Rate

The GeForce GTX 275 will be much (about 50%) faster with regards to AA than the GeForce GTS 250 1GB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTS 250 1GB		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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.