GeForce GTX 650 Ti vs GeForce GTX 660

Intro

Compare those specs to the GeForce GTX 660, which has GPU clock speed of 980 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 192-bit bus. It also is comprised of 960 SPUs, 80 TAUs, and 24 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 660		5063 points
GeForce GTX 650 Ti		3434 points
	Difference: 1629 (47%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
GeForce GTX 660		140 Watts
	Difference: 30 Watts (27%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should theoretically be quite a bit better than the GeForce GTX 650 Ti overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 57792 (67%)

Texel Rate

The GeForce GTX 660 is a lot (approximately 32%) better at texture filtering than the GeForce GTX 650 Ti. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 650 Ti		59392 Mtexels/sec
	Difference: 19008 (32%)

Pixel Rate

The GeForce GTX 660 should be a lot (about 58%) better at FSAA than the GeForce GTX 650 Ti, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 650 Ti		14848 Mpixels/sec
	Difference: 8672 (58%)

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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.