Radeon R9 390 8G vs Radeon RX 6650 XT

Intro

Compare those specs to the Radeon RX 6650 XT, which uses a 7 nm design. AMD has clocked the core speed at 2055 MHz. The GDDR6 memory runs at a frequency of 2190 MHz on this specific card. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
Radeon R9 390 8G		275 Watts
	Difference: 99 Watts (56%)

Memory Bandwidth

The Radeon R9 390 8G should in theory perform quite a bit faster than the Radeon RX 6650 XT overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 96928 (34%)

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 64%) faster with regards to AF than the Radeon R9 390 8G. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 103040 (64%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6650 XT is a better choice, and very much so. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 67520 (106%)

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 maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.