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GeForce 9800 GX2 vs GeForce GTX 260

Intro

The GeForce 9800 GX2 has a clock speed of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also uses a 256-bit bus, and makes use of a 65 nm design. It features 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare those specifications to the GeForce GTX 260, which has a clock speed of 576 MHz and a GDDR3 memory frequency of 999 MHz. It also uses a 448-bit bus, and uses a 65 nm design. It is made up of 192 SPUs, 64 TAUs, and 28 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 182 Watts
GeForce 9800 GX2 197 Watts
Difference: 15 Watts (8%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 will be 14% faster than the GeForce GTX 260 in general, because of its higher bandwidth. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 16112 (14%)

Texel Rate

The GeForce 9800 GX2 should be much (more or less 108%) more effective at anisotropic filtering than the GeForce GTX 260. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 39936 (108%)

Pixel Rate

The GeForce 9800 GX2 should be a little bit (more or less 19%) faster with regards to full screen anti-aliasing than the GeForce GTX 260, and also will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GTX 260 16128 Mpixels/sec
Difference: 3072 (19%)

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 260

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 260
Manufacturer nVidia nVidia
Year Mar 2008 June 16, 2008
Code Name G92 G200
Memory 512 MB (x2) 896 MB
Core Speed 600 MHz (x2) 576 MHz
Memory Speed 2000 MHz (x2) 1998 MHz
Power (Max TDP) 197 watts 182 watts
Bandwidth 128000 MB/sec 111888 MB/sec
Texel Rate 76800 Mtexels/sec 36864 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 16128 Mpixels/sec
Unified Shaders 128 (x2) 192
Texture Mapping Units 64 (x2) 64
Render Output Units 16 (x2) 28
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 448-bit
Fab Process 65 nm 65 nm
Transistors 754 million 1400 million
Bus PCIe x16 2.0 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.1

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its 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 core 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTX 260

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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