Radeon R9 270X vs Radeon RX 6800

Intro

Compare all that to the Radeon RX 6800, which comes with core speeds of 1700 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 3840 SPUs along with 240 Texture Address Units and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X		180 Watts
Radeon RX 6800		250 Watts
	Difference: 70 Watts (39%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 will be 193% faster than the Radeon R9 270X overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon RX 6800 is quite a bit (approximately 410%) faster with regards to anisotropic filtering than the Radeon R9 270X. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon R9 270X		80000 Mtexels/sec
	Difference: 328000 (410%)

Pixel Rate

The Radeon RX 6800 should be a lot (about 410%) more effective at AA than the Radeon R9 270X, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon R9 270X		32000 Mpixels/sec
	Difference: 131200 (410%)

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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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