Radeon R9 M395X vs Radeon RX 6800 XT

Intro

Compare those specs to the Radeon RX 6800 XT, which comes with a clock speed of 1825 MHz and a GDDR6 memory speed of 2000 MHz. It also uses a 256-bit bus, and uses a 7 nm design. It features 4608 SPUs, 288 TAUs, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 175 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 XT will be 228% quicker than the Radeon R9 M395X overall, because of its greater bandwidth. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 364288 (228%)

Texel Rate

The Radeon RX 6800 XT will be a lot (about 468%) more effective at anisotropic filtering than the Radeon R9 M395X. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 433056 (468%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 6800 XT is a better choice, by a large margin. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 210464 (910%)

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: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses 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 amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.