GeForce 9800 GX2 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which comes with GPU clock speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
GeForce 9800 GX2		197 Watts
	Difference: 117 Watts (146%)

Memory Bandwidth

The GeForce 9800 GX2 should in theory perform a little bit faster than the Radeon RX 560 overall. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 13312 (12%)

Texel Rate

The GeForce 9800 GX2 should be just a bit (about 2%) more effective at AF than the Radeon RX 560. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 1600 (2%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 9800 GX2 is the winner, not by a very large margin though. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 400 (2%)

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 largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen 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 amount of texture units of the card by the core clock speed of the chip. The better 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 number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.