GeForce 9800 GX2 vs GeForce GTX 295

Intro

Compare those specifications to the GeForce GTX 295, which features core clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 240 SPUs as well as 80 TAUs and 28 ROPs.

Display Graphs

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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

Theoretically speaking, the GeForce GTX 295 should be quite a bit faster than the GeForce 9800 GX2 in general. (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 little bit (about 20%) more effective 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 quite a bit (about 68%) more effective at full screen anti-aliasing than the GeForce 9800 GX2, and also able to handle higher 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

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.