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GeForce 9800 GX2 vs GeForce GTX 280

Intro

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

Compare all of that to the GeForce GTX 280, which has a clock speed of 602 MHz and a GDDR3 memory frequency of 1107 MHz. It also makes use of a 512-bit memory bus, and makes use of a 65 nm design. It is comprised of 240 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GX2 197 Watts
GeForce GTX 280 236 Watts
Difference: 39 Watts (20%)

Memory Bandwidth

Theoretically, the GeForce GTX 280 should be just a bit faster than the GeForce 9800 GX2 overall. (explain)

GeForce GTX 280 141696 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 13696 (11%)

Texel Rate

The GeForce 9800 GX2 will be quite a bit (approximately 59%) more effective at texture filtering than the GeForce GTX 280. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 28640 (59%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 280 is a better choice, not by a very large margin though. (explain)

GeForce GTX 280 19264 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 64 (0%)

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 280

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

Display Specifications

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Model GeForce 9800 GX2 GeForce GTX 280
Manufacturer nVidia nVidia
Year Mar 2008 June 17, 2008
Code Name G92 G200
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 602 MHz
Memory Speed 2000 MHz (x2) 2214 MHz
Power (Max TDP) 197 watts 236 watts
Bandwidth 128000 MB/sec 141696 MB/sec
Texel Rate 76800 Mtexels/sec 48160 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 19264 Mpixels/sec
Unified Shaders 128 (x2) 240
Texture Mapping Units 64 (x2) 80
Render Output Units 16 (x2) 32
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 512-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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTX 280

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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