GeForce GTS 250 512MB vs GeForce GTX 650 Ti

Intro

Compare all of that to the GeForce GTX 650 Ti, which makes use of a 28 nm design. nVidia has set the core speed at 928 MHz. The GDDR5 memory runs at a frequency of 1350 MHz on this model. It features 768 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

The GeForce GTX 650 Ti, in theory, should perform much faster than the GeForce GTS 250 512MB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 16000 (23%)

Texel Rate

The GeForce GTX 650 Ti should be much (more or less 26%) more effective at AF than the GeForce GTS 250 512MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 12160 (26%)

Pixel Rate

The GeForce GTX 650 Ti should be a lot (about 26%) faster with regards to AA than the GeForce GTS 250 512MB, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 3040 (26%)

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 (in units of MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, 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 most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.