That's well below the thermal limitations for your CPU. You might want to start looking up on how to overclock your processor.
ASUS P8P67 Motherboard - CPU Support List
Here is the list of processors that your motherboard supports.
As I suspected, the best processor upgrade for this motherboard is going to be the Intel Core I7-3770/3770K. However, you would need to update the BIOS on the motherboard first, in order to use the 3rd generation processor. Instructions for doing so should be in your motherboard manual (click the Manuals & Documents tab from the link above).
These processors are available from EBay, starting at around $75 - Buy It Now. Auctions are starting below that. Either way, I wouldn't spend more than $100 for one of these processors.
-Wolf sends