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GeForce 9800 GX2 vs GeForce GTX 660

Intro

The GeForce 9800 GX2 has clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 64 TAUs and 16 ROPs.

Compare those specifications to the GeForce GTX 660, which makes use of a 28 nm design. nVidia has set the core speed at 980 MHz. The GDDR5 memory runs at a speed of 1502 MHz on this card. It features 960 SPUs along with 80 Texture Address Units and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce 9800 GX2 197 Watts
Difference: 57 Watts (41%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 should theoretically be just a bit superior to the GeForce 9800 GX2 overall. (explain)

GeForce GTX 660 144192 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 16192 (13%)

Texel Rate

The GeForce GTX 660 is a little bit (approximately 2%) better at texture filtering than the GeForce 9800 GX2. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce 9800 GX2 76800 Mtexels/sec
Difference: 1600 (2%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is the winner, by far. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 4320 (23%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 9800 GX2

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.

Specifications

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Model GeForce 9800 GX2 GeForce GTX 660
Manufacturer nVidia nVidia
Year Mar 2008 September 2012
Code Name G92 GK106
Memory 512 MB (x2) 2048 MB
Core Speed 600 MHz (x2) 980 MHz
Memory Speed 2000 MHz (x2) 6008 MHz
Power (Max TDP) 197 watts 140 watts
Bandwidth 128000 MB/sec 144192 MB/sec
Texel Rate 76800 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 128 (x2) 960
Texture Mapping Units 64 (x2) 80
Render Output Units 16 (x2) 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 192-bit
Fab Process 65 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 transferred over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

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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