Radeon R9 390 8G vs Radeon RX 6750 XT

Intro

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

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

Performance-wise, the Radeon RX 6750 XT should in theory be just 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 (approximately 115%) faster with regards to 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

If using lots of anti-aliasing is important to you, then the Radeon RX 6750 XT is superior to the Radeon R9 390 8G, by a large margin. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.