ASUS TUF B550M-Plus WiFi Review

One correction on page 2 (up close): "Between the two PCI Express slots - the uppermost armoured one being PCIe 4.0 whilst the black one is PCIe 3.0 - we have the heatspreader for the PCIe 4.0 M.2 drive that will bring you blistering transfer rates."

That is the PCIe 3.0 M.2 slot. The PCIe 4.0 M.2 slot is the one closest to the CPU and does not come with a heat spreader, presumably because Asus expects that the PCIe 4.0 SSDs will come with their own heat spreaders. Corsair - which is part of the "TUF alliance" with Asus - deliver their MP600 series PCIe 4.0 M.2 SSDs with integrated heat spreaders. Seagate's ZP500 does not come with a heat spreader, so you'd probably have to buy one if you plan to use that SSD on this motherboard.

Gigabyte's AORUS PCIe 4.0 M.2 SSD also comes with its own heat spreader, which means you'll have spare ones, as Gigabyte's B550 motherboards come with a heat spreader.Quote

Overclocking micron rev E ddr4 needs low dram termination voltage.
What voltage range is available on this board?Quote