Ok, so I bought an ASRock P67 EXTREME4 motherboard from ebuyer a month ago, did a bit of overclocking of a 2600K and got it stable and folding nicely. Then it became unstable with restarts, BSODs, requiring Windows 7 recovering and then finally it wouldn't POST. I discovered the 4-pin 12V plug had melted in the socket: I have had this happen with a different setup in the past. On that occasion I replaced the plug on the PSU and cleaned up the socket and all was well - it never happened again. This time though the motherboard socket is too badly melted to accept a plug so I need to return it to get it repaired/replaced... it's outside ebuyer's (measly) warranty period (I have a business account so I believe it's shorter) and ASRock want 25 euro to cover the cost of getting the board back to me. I once had to return a DFI motherboard that was under warranty and DFI never asked me to cover the same cost so I'm a little suprised. I'm just wondering, has anyone else had a similar fault? Or what are others' motherboard RMA experiences? The last time I had this type of failure it was again a blue-coloured (UV-reactive?) 12V 4-pin plug which seem to be softer plastic that the common white or black, so it seems to me these are not so good at withstanding a bit of heat, or maybe the contacts aren't as good so some sparking occurs. Or it's just coincidence. Ideally I would have used an 8-pin plug in the socket which could have prevented this fault by spreading the load across more pins, but my PSU didn't have this and the ASRock manual just said either could be used - there was no recommendation.