Is it normal for the fuse to be warm to the touch on high clock? I have 2 cubes, one doesn't like high clock, the other one seems ok but the fuse is warm to the touch. I have only had it on high clock for 4 or 5 hours now after running on low for a couple days, but I don't know if I should leave it on high or not.
I had one cube totally destroy the fuse, fuse holder and do considerable damage to the main board after a week of running on the high clock speed.
I have had to jury rig a repair using heavy gauge wire running to an external fuse. The new fuse runs hot to the touch (>50c), you can keep your finger on the fuse, but it is uncomfortable, on the point of starting to burn. One advantage of the wires is I can place the fuse itself in the airflow to the fan which cools it somewhat.
The design they have used, is that both power feeds are combined into one 12v rail just before the fuse. I think a better design would have been to keep the two high current feeds on separate rails each feeding 3 blades and have a third 12v feed from the power supply (there are usually plenty of those spare even on power supplies running multiple cubes) feeding the main board, fan and Ethernet port. That would spread the load out more