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GeForce 9800 GX2 vs GeForce GTX 295

Intro

The GeForce 9800 GX2 makes use of a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM is set to run at a speed of 1000 MHz on this model. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare those specs to the GeForce GTX 295, which has a core clock speed of 576 MHz and a GDDR3 memory speed of 999 MHz. It also makes use of a 448-bit memory bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 28 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GX2 197 Watts
GeForce GTX 295 289 Watts
Difference: 92 Watts (47%)

Memory Bandwidth

In theory, the GeForce GTX 295 will be 75% faster than the GeForce 9800 GX2 in general, because of its greater data rate. (explain)

GeForce GTX 295 223776 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 95776 (75%)

Texel Rate

The GeForce GTX 295 is a little bit (approximately 20%) better at anisotropic filtering than the GeForce 9800 GX2. (explain)

GeForce GTX 295 92160 Mtexels/sec
GeForce 9800 GX2 76800 Mtexels/sec
Difference: 15360 (20%)

Pixel Rate

The GeForce GTX 295 should be a lot (more or less 68%) faster with regards to AA than the GeForce 9800 GX2, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 295 32256 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 13056 (68%)

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 GTX 295

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 GTX 295
Manufacturer nVidia nVidia
Year Mar 2008 January 8, 2009
Code Name G92 G200b
Memory 512 MB (x2) 896 MB (x2)
Core Speed 600 MHz (x2) 576 MHz (x2)
Memory Speed 2000 MHz (x2) 1998 MHz (x2)
Power (Max TDP) 197 watts 289 watts
Bandwidth 128000 MB/sec 223776 MB/sec
Texel Rate 76800 Mtexels/sec 92160 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 32256 Mpixels/sec
Unified Shaders 128 (x2) 240 (x2)
Texture Mapping Units 64 (x2) 80 (x2)
Render Output Units 16 (x2) 28 (x2)
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 448-bit (x2)
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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 number is worked out by multiplying the total texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the 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 295

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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