Looking at the picture it looks like you popped a few voltage regulators there.
The causes are this.
1. A really cheap PSU/ obviously not since it was a silverstone
2. A short on the back of the motherboard IE a standoff touching the back of the board.
3. Underrated wattage the board can output for the Cpu fitted.
4. Something inserted wrongly, or not inserted correctly.
Number two looks like the cause, a short on the back of the board. So have a check of the back plate of the case where the mobo was in line with the burned voltage regulator. Could of been a bad one so see if its covered for RMA.