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GeForce 9800 GX2 vs GeForce GT 220 GDDR3

Intro

The GeForce 9800 GX2 features a GPU core clock speed of 600 MHz, and the 512 MB of GDDR3 memory is set to run at 1000 MHz through a 256-bit bus. It also features 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare those specifications to the GeForce GT 220 GDDR3, which uses a 40 nm design. nVidia has set the core speed at 625 MHz. The GDDR3 memory is set to run at a frequency of 1012 MHz on this specific model. It features 48 SPUs as well as 16 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3 58 Watts
GeForce 9800 GX2 197 Watts
Difference: 139 Watts (240%)

Memory Bandwidth

As far as performance goes, the GeForce 9800 GX2 should in theory be quite a bit better than the GeForce GT 220 GDDR3 in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GT 220 GDDR3 32384 MB/sec
Difference: 95616 (295%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 668%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GT 220 GDDR3 10000 Mtexels/sec
Difference: 66800 (668%)

Pixel Rate

The GeForce 9800 GX2 will be much (more or less 284%) more effective at anti-aliasing than the GeForce GT 220 GDDR3, and capable of handling higher screen resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GT 220 GDDR3 5000 Mpixels/sec
Difference: 14200 (284%)

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

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GeForce GT 220 GDDR3

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 9800 GX2 GeForce GT 220 GDDR3
Manufacturer nVidia nVidia
Year Mar 2008 October 2009
Code Name G92 GT216
Memory 512 MB (x2) 512 MB
Core Speed 600 MHz (x2) 625 MHz
Memory Speed 2000 MHz (x2) 2024 MHz
Power (Max TDP) 197 watts 58 watts
Bandwidth 128000 MB/sec 32384 MB/sec
Texel Rate 76800 Mtexels/sec 10000 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 5000 Mpixels/sec
Unified Shaders 128 (x2) 48
Texture Mapping Units 64 (x2) 16
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 486 million
Bus PCIe x16 2.0 PCIe 2.0
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 are processed in one second. This is worked out by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GT 220 GDDR3

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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