Radeon R9 295X2 vs Radeon RX 6800 XT

Intro

Compare that to the Radeon RX 6800 XT, which comes with core clock speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 memory. It features 4608 SPUs along with 288 Texture Address Units and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 XT		300 Watts
Radeon R9 295X2		500 Watts
	Difference: 200 Watts (67%)

Memory Bandwidth

The Radeon R9 295X2 should theoretically perform much faster than the Radeon RX 6800 XT in general. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon RX 6800 XT		524288 MB/sec
	Difference: 115712 (22%)

Texel Rate

The Radeon RX 6800 XT is quite a bit (about 47%) more effective at AF than the Radeon R9 295X2. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon R9 295X2		358336 Mtexels/sec
	Difference: 167264 (47%)

Pixel Rate

The Radeon RX 6800 XT is a lot (about 79%) better at full screen anti-aliasing than the Radeon R9 295X2, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon R9 295X2		130304 Mpixels/sec
	Difference: 103296 (79%)

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 max amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.