Radeon R9 390 8G vs Radeon RX 6700 XT

Intro

Compare those specifications to the Radeon RX 6700 XT, which has a clock speed of 2321 MHz and a GDDR6 memory speed of 2000 MHz. It also uses a 192-bit memory bus, and uses a 7 nm design. It is comprised of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6700 XT		230 Watts
Radeon R9 390 8G		275 Watts
	Difference: 45 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6700 XT should perform just a bit faster than the Radeon R9 390 8G overall. (explain)

Radeon RX 6700 XT		393216 MB/sec
Radeon R9 390 8G		384000 MB/sec
	Difference: 9216 (2%)

Texel Rate

The Radeon RX 6700 XT will be much (more or less 132%) faster with regards to AF than the Radeon R9 390 8G. (explain)

Radeon RX 6700 XT		371360 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 211360 (132%)

Pixel Rate

The Radeon RX 6700 XT should be a lot (about 132%) faster with regards to AA than the Radeon R9 390 8G, and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 6700 XT		148544 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 84544 (132%)

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 largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.