GeForce GTS 250 1GB vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory works at a speed of 1500 MHz on this particular model. It features 1344 SPUs as well as 112 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

The GeForce GTX 660 Ti, in theory, should perform much faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 73600 (105%)

Texel Rate

The GeForce GTX 660 Ti will be much (approximately 117%) more effective at AF than the GeForce GTS 250 1GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 55248 (117%)

Pixel Rate

The GeForce GTX 660 Ti should be much (approximately 86%) faster with regards to full screen anti-aliasing than the GeForce GTS 250 1GB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 10152 (86%)

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 megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.