GeForce GTX 660 vs GeForce GTX 950

Intro

Compare those specs to the GeForce GTX 950, which comes with GPU core speed of 1024 MHz, and 2048 MB of GDDR5 RAM running at 1652 MHz through a 128-bit bus. It also is made up of 768 SPUs, 48 TAUs, and 32 Raster Operation Units.

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 950		6536 points
GeForce GTX 660		5063 points
	Difference: 1473 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
GeForce GTX 660		140 Watts
	Difference: 50 Watts (56%)

Memory Bandwidth

The GeForce GTX 660 should theoretically perform much faster than the GeForce GTX 950 overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 950		105728 MB/sec
	Difference: 38464 (36%)

Texel Rate

The GeForce GTX 660 is a lot (approximately 60%) better at texture filtering than the GeForce GTX 950. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 950		49152 Mtexels/sec
	Difference: 29248 (60%)

Pixel Rate

The GeForce GTX 950 is a lot (more or less 39%) better at anti-aliasing than the GeForce GTX 660, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 950		32768 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 9248 (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 largest amount of information (counted in MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 maximum number of pixels that the graphics card could possibly record 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 - sometimes also referred to as 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 of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.