GeForce 9800 GX2 vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which comes with core clock speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce 9800 GX2		197 Watts
	Difference: 167 Watts (557%)

Memory Bandwidth

The GeForce 9800 GX2 should theoretically be much faster than the Radeon R7 240 overall. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 99200 (344%)

Texel Rate

The GeForce 9800 GX2 should be quite a bit (about 426%) faster with regards to AF than the Radeon R7 240. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 62200 (426%)

Pixel Rate

The GeForce 9800 GX2 should be a lot (more or less 229%) better at FSAA than the Radeon R7 240, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 13360 (229%)

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 data (in units of megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.