GeForce GTX 650 vs GeForce GTX 660

Intro

Compare that to the GeForce GTX 660, which has a clock frequency of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is made up of 960 SPUs, 80 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

Hide Graphs

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		2263 points
	Difference: 2800 (124%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 660		140 Watts
	Difference: 76 Watts (119%)

Memory Bandwidth

The GeForce GTX 660, in theory, should be a lot faster than the GeForce GTX 650 in general. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 64192 (80%)

Texel Rate

The GeForce GTX 660 is a lot (more or less 132%) more effective at texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 44544 (132%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 660 is superior to the GeForce GTX 650, and very much so. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 6592 (39%)

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 information (measured in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.