Radeon R9 390 8G vs Radeon RX 6750 XT

Intro

Compare those specifications to the Radeon RX 6750 XT, which has a core clock frequency of 2150 MHz and a GDDR6 memory speed of 2250 MHz. It also features a 192-bit bus, and makes use of a 7 nm design. It features 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6750 XT		250 Watts
Radeon R9 390 8G		275 Watts
	Difference: 25 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6750 XT should theoretically be a bit superior to the Radeon R9 390 8G overall. (explain)

Radeon RX 6750 XT		442368 MB/sec
Radeon R9 390 8G		384000 MB/sec
	Difference: 58368 (15%)

Texel Rate

The Radeon RX 6750 XT is quite a bit (about 115%) better at texture filtering than the Radeon R9 390 8G. (explain)

Radeon RX 6750 XT		344000 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 184000 (115%)

Pixel Rate

The Radeon RX 6750 XT should be much (about 115%) more effective at anti-aliasing than the Radeon R9 390 8G, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 6750 XT		137600 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 73600 (115%)

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 max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.