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GeForce 9800 GX2 vs GeForce GTX 260 216SP 55 nm

Intro

The GeForce 9800 GX2 has a clock frequency of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also makes use of a 256-bit memory bus, and uses a 65 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 ROPs.

Compare all that to the GeForce GTX 260 216SP 55 nm, which has GPU clock speed of 576 MHz, and 896 MB of GDDR3 RAM set to run at 999 MHz through a 448-bit bus. It also is comprised of 216 SPUs, 72 TAUs, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 216SP 55 nm 171 Watts
GeForce 9800 GX2 197 Watts
Difference: 26 Watts (15%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be a bit better than the GeForce GTX 260 216SP 55 nm overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GTX 260 216SP 55 nm 111888 MB/sec
Difference: 16112 (14%)

Texel Rate

The GeForce 9800 GX2 is quite a bit (approximately 85%) more effective at anisotropic filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GTX 260 216SP 55 nm 41472 Mtexels/sec
Difference: 35328 (85%)

Pixel Rate

The GeForce 9800 GX2 is just a bit (about 19%) more effective at FSAA than the GeForce GTX 260 216SP 55 nm, and also able to handle higher resolutions while still performing well. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GTX 260 216SP 55 nm 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 216SP 55 nm

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 216SP 55 nm
Manufacturer nVidia nVidia
Year Mar 2008 December 22, 2008
Code Name G92 G200b
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 171 watts
Bandwidth 128000 MB/sec 111888 MB/sec
Texel Rate 76800 Mtexels/sec 41472 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 16128 Mpixels/sec
Unified Shaders 128 (x2) 216
Texture Mapping Units 64 (x2) 72
Render Output Units 16 (x2) 28
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 448-bit
Fab Process 65 nm 55 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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure 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 filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTX 260 216SP 55 nm

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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