Radeon R9 270 vs Radeon RX 6800

Intro

Compare all that to the Radeon RX 6800, which has a clock speed of 1700 MHz and a GDDR6 memory frequency of 2000 MHz. It also uses a 256-bit memory bus, and makes use of a 7 nm design. It features 3840 SPUs, 240 TAUs, and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
Radeon RX 6800		250 Watts
	Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 should be 193% quicker than the Radeon R9 270 in general, because of its greater data rate. (explain)

Radeon RX 6800		524288 MB/sec
Radeon R9 270		179200 MB/sec
	Difference: 345088 (193%)

Texel Rate

The Radeon RX 6800 is quite a bit (approximately 467%) more effective at AF than the Radeon R9 270. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 336000 (467%)

Pixel Rate

The Radeon RX 6800 should be quite a bit (about 467%) better at AA than the Radeon R9 270, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon R9 270		28800 Mpixels/sec
	Difference: 134400 (467%)

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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.