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GeForce GTX 260 vs GeForce GTX 660

Intro

The GeForce GTX 260 has a GPU core speed of 576 MHz, and the 896 MB of GDDR3 RAM runs at 999 MHz through a 448-bit bus. It also is made up of 192 Stream Processors, 64 TAUs, and 28 ROPs.

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

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 260 182 Watts
Difference: 42 Watts (30%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should be 29% quicker than the GeForce GTX 260 in general, because of its greater bandwidth. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 32304 (29%)

Texel Rate

The GeForce GTX 660 will be much (approximately 113%) more effective at anisotropic filtering than the GeForce GTX 260. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 41536 (113%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 660 is superior to the GeForce GTX 260, by a large margin. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 260 16128 Mpixels/sec
Difference: 7392 (46%)

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

GeForce GTX 260

Amazon.com

GeForce GTX 660

Amazon.com

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

Model GeForce GTX 260 GeForce GTX 660
Manufacturer nVidia nVidia
Year June 16, 2008 September 2012
Code Name G200 GK106
Fab Process 65 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 896 MB 2048 MB
Core Speed 576 MHz 980 MHz
Shader Speed 1242 MHz 980 MHz
Memory Speed 999 MHz (1998 MHz effective) 1502 MHz (6008 MHz effective)
Unified Shaders 192 960
Texture Mapping Units 64 80
Render Output Units 28 24
Bus Type GDDR3 GDDR5
Bus Width 448-bit 192-bit
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.3
Power (Max TDP) 182 watts 140 watts
Shader Model 4.0 5.0
Bandwidth 111888 MB/sec 144192 MB/sec
Texel Rate 36864 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 23520 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTX 260 vs GeForce GTX 660”
[...] GeForce GTX 260 vs GeForce GTX 660 – Performance Comparison Benchmarks @ Hardware Compare 30% only more memory bandwith :P [...]

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