TS, i suggest you read and do some research before you even start to OC. You don't even have the slightest idea about overclocking. Don't expect people to spoon feed you.

I am guessing that you just bump the frequency without touching any other settings. If that fail, you should start increasing the vcore, step by step. Still cannot, then bring the HT down to 4X...so on and so forth.

As for the PSU If you still wanna OC....Change the PSU.