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GeForce 9800 GX2 vs GeForce GTX 295

Intro

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

Compare those specs to the GeForce GTX 295, which features GPU clock speed of 576 MHz, and 896 MB of GDDR3 memory running at 999 MHz through a 448-bit bus. It also features 240 SPUs, 80 TAUs, and 28 ROPs.

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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

Performance-wise, the GeForce GTX 295 should in theory be much better than the GeForce 9800 GX2 overall. (explain)

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

Texel Rate

The GeForce GTX 295 will be a 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 is much (about 68%) more effective at AA than the GeForce 9800 GX2, and able to handle higher screen resolutions better. (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

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.

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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per 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. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach 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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