GeForce GTS 250 1GB vs GeForce GTX 750 Ti

Intro

Compare all of that to the GeForce GTX 750 Ti, which comes with core speeds of 1020 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 85 Watts (142%)

Memory Bandwidth

The GeForce GTX 750 Ti, in theory, should be much faster than the GeForce GTS 250 1GB overall. (explain)

GeForce GTX 750 Ti		86400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 16000 (23%)

Texel Rate

The GeForce GTS 250 1GB will be a bit (approximately 16%) more effective at AF than the GeForce GTX 750 Ti. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 6432 (16%)

Pixel Rate

The GeForce GTX 750 Ti will be much (about 38%) better at AA than the GeForce GTS 250 1GB, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 4512 (38%)

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 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 bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.