Radeon R9 M385X vs Radeon RX 6800 XT

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 XT should be 446% faster than the Radeon R9 M385X overall, because of its greater bandwidth. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 428288 (446%)

Texel Rate

The Radeon RX 6800 XT should be quite a bit (approximately 753%) faster with regards to AF than the Radeon R9 M385X. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 464000 (753%)

Pixel Rate

The Radeon RX 6800 XT should be quite a bit (about 1227%) better at FSAA than the Radeon R9 M385X, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 216000 (1227%)

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 (in units of MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.