GeForce GTS 250 1GB vs GeForce GTX 650 Ti 2GB

Intro

Compare all of that to the GeForce GTX 650 Ti 2GB, which comes with clock speeds of 928 MHz on the GPU, and 1350 MHz on the 2048 MB of GDDR5 memory. 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 2GB		110 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

In theory, the GeForce GTX 650 Ti 2GB should be quite a bit faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 16000 (23%)

Texel Rate

The GeForce GTX 650 Ti 2GB will be quite a bit (approximately 26%) faster with regards to AF than the GeForce GTS 250 1GB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 12160 (26%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 Ti 2GB is superior to the GeForce GTS 250 1GB, and very much so. (explain)

GeForce GTX 650 Ti 2GB		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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface in one second. The number is calculated 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 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on 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 potential to get to the maximum fill rate.