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GeForce GTS 150 vs GeForce GTX 660

Intro

The GeForce GTS 150 has a core clock speed of 740 MHz and a GDDR3 memory speed of 500 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 128 SPUs, 64 TAUs, and 16 ROPs.

Compare those specs to the GeForce GTX 660, which features a GPU core clock speed of 980 MHz, and 2048 MB of GDDR5 RAM running at 1502 MHz through a 192-bit bus. It also is comprised of 960 SPUs, 80 Texture Address Units, and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTS 150 141 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should be 351% faster than the GeForce GTS 150 in general, due to its higher data rate. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTS 150 32000 MB/sec
Difference: 112192 (351%)

Texel Rate

The GeForce GTX 660 is much (approximately 66%) faster with regards to AF than the GeForce GTS 150. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTS 150 47360 Mtexels/sec
Difference: 31040 (66%)

Pixel Rate

The GeForce GTX 660 is a lot (about 99%) more effective at anti-aliasing than the GeForce GTS 150, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTS 150 11840 Mpixels/sec
Difference: 11680 (99%)

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

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GeForce GTS 150

Amazon.com

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GeForce GTX 660

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTS 150 GeForce GTX 660
Manufacturer nVidia nVidia
Year March 10, 2009 September 2012
Code Name G92b GK106
Memory 1024 MB 2048 MB
Core Speed 740 MHz 980 MHz
Memory Speed 1000 MHz 6008 MHz
Power (Max TDP) 141 watts 140 watts
Bandwidth 32000 MB/sec 144192 MB/sec
Texel Rate 47360 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 11840 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 128 960
Texture Mapping Units 64 80
Render Output Units 16 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit 192-bit
Fab Process 55 nm 28 nm
Transistors 754 million 2540 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of 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 clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. 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 rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTS 150

Amazon.com

Check prices at:

GeForce GTX 660

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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