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GeForce 9800 GX2 vs GeForce GTX 660 Ti

Intro

The GeForce 9800 GX2 comes with clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the GeForce GTX 660 Ti, which features a clock speed of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
GeForce 9800 GX2 197 Watts
Difference: 47 Watts (31%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should be just a bit faster than the GeForce 9800 GX2 overall. (explain)

GeForce GTX 660 Ti 144000 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 16000 (13%)

Texel Rate

The GeForce GTX 660 Ti will be a lot (approximately 33%) more effective at texture filtering than the GeForce 9800 GX2. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
GeForce 9800 GX2 76800 Mtexels/sec
Difference: 25680 (33%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 Ti is the winner, though not by far. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 2760 (14%)

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 Ti

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 Ti
Manufacturer nVidia nVidia
Year Mar 2008 August 2012
Code Name G92 GK104
Memory 512 MB (x2) 2048 MB
Core Speed 600 MHz (x2) 915 MHz
Memory Speed 2000 MHz (x2) 6000 MHz
Power (Max TDP) 197 watts 150 watts
Bandwidth 128000 MB/sec 144000 MB/sec
Texel Rate 76800 Mtexels/sec 102480 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 21960 Mpixels/sec
Unified Shaders 128 (x2) 1344
Texture Mapping Units 64 (x2) 112
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 3540 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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTX 660 Ti

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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