Just want to share my exp.
Burnt one of the PCI-E power cable yesterday, power cable melted and got welded to the PSU for ever

Not sure of the reason though.
- Might be a faulty PSU/cable (1500W)
- Might have been caused because I tuned by 4 R9 290 connected to it to run at 880 KH/s instead of 825ish it was running at for weeks.
I have good control over temp of cards, nothing goes above 90, usually in their 80s
Not sure yet, back to cgminer setting which gives me 825ish and a new (same brand PSU)
PSU: Silverstone Strider Series 1500 Watt (SST-ST1500)
I want to mine, but keep my house intact as well and not burn it down

I know this has nothing to do with middlecoin, but just sharing....