GeForce 9800 GX2 vs GeForce GT 340

Intro

Compare those specs to the GeForce GT 340, which comes with a core clock speed of 550 MHz and a GDDR5 memory speed of 850 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 96 SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
GeForce 9800 GX2		197 Watts
	Difference: 128 Watts (186%)

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GX2 is 135% faster than the GeForce GT 340 in general, because of its higher bandwidth. (explain)

GeForce 9800 GX2		128000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 73600 (135%)

Texel Rate

The GeForce 9800 GX2 is quite a bit (more or less 336%) more effective at texture filtering than the GeForce GT 340. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 59200 (336%)

Pixel Rate

The GeForce 9800 GX2 should be a lot (approximately 336%) faster with regards to FSAA than the GeForce GT 340, and capable of handling higher resolutions while still performing well. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 14800 (336%)

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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it 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 processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated 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 fill 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.