GeForce 9800 GX2 vs GeForce GTX 780 Ti

Intro

Compare those specs to the GeForce GTX 780 Ti, which has a GPU core clock speed of 875 MHz, and 3072 MB of GDDR5 memory running at 1750 MHz through a 384-bit bus. It also is comprised of 2880 SPUs, 240 Texture Address Units, and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GX2		197 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 53 Watts (27%)

Memory Bandwidth

The GeForce GTX 780 Ti should in theory perform much faster than the GeForce 9800 GX2 in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce 9800 GX2		128000 MB/sec
	Difference: 208000 (163%)

Texel Rate

The GeForce GTX 780 Ti will be quite a bit (approximately 173%) more effective at texture filtering than the GeForce 9800 GX2. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce 9800 GX2		76800 Mtexels/sec
	Difference: 133200 (173%)

Pixel Rate

The GeForce GTX 780 Ti will be much (approximately 119%) better at AA than the GeForce 9800 GX2, and will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce 9800 GX2		19200 Mpixels/sec
	Difference: 22800 (119%)

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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 processed in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the 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 the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.