Radeon R9 M390X vs Radeon RX 6750 XT

Intro

Compare all that to the Radeon RX 6750 XT, which uses a 7 nm design. AMD has clocked the core frequency at 2150 MHz. The GDDR6 RAM runs at a speed of 2250 MHz on this model. It features 2560 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon RX 6750 XT		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

In theory, the Radeon RX 6750 XT is 176% faster than the Radeon R9 M390X overall, due to its greater bandwidth. (explain)

Radeon RX 6750 XT		442368 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 282368 (176%)

Texel Rate

The Radeon RX 6750 XT should be a lot (about 272%) more effective at texture filtering than the Radeon R9 M390X. (explain)

Radeon RX 6750 XT		344000 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 251456 (272%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 6750 XT is superior to the Radeon R9 M390X, and very much so. (explain)

Radeon RX 6750 XT		137600 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 114464 (495%)

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 data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate 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 rate also depends 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 maximum fill rate.