GeForce GTS 250 1GB vs GeForce GTX 650 Ti

Intro

Compare all that to the GeForce GTX 650 Ti, which makes use of a 28 nm design. nVidia has clocked the core frequency at 928 MHz. The GDDR5 RAM is set to run at a frequency of 1350 MHz on this specific model. It features 768 SPUs along with 64 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 Ti should in theory be quite a bit better than the GeForce GTS 250 1GB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 16000 (23%)

Texel Rate

The GeForce GTX 650 Ti should be much (approximately 26%) better at anisotropic filtering than the GeForce GTS 250 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 12160 (26%)

Pixel Rate

The GeForce GTX 650 Ti will be quite a bit (more or less 26%) faster with regards to anti-aliasing than the GeForce GTS 250 1GB, and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce GTS 250 1GB		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 largest amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.