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[Asrock Extreme 4] Sign in to follow this . Followers 1. How do i clear my CMOS? [Asrock Extreme 4] By Jeroen1322, February 8, 2014 in CPUs, Motherboards, and Memory · 19 replies. Recommended Posts. Jeroen1322. Jeroen1322 1,230 Member · 2,435 posts; 2,435 posts; Spam bot; Location: The Netherlands. The ASRock Z390 Extreme4 offers like the previously tested ASRock H370 Performance two fast Ultra M.2 slots for PCIe Gen3 x4 modules with up to 32 Gb/s connection and a simple M.2 Key E e.g. for a WiFi module. The following picture shows the six PCIe 3.0 slots and the three M.2 slots, whereby the lower M.2 socket was even equipped with a heat sink..