|Nothing will break if you know what you're doing. The worst that can happen is the system will become unstable or unbootable & if that happens, all you need to do is load the BIOS defaults (or use the clear CMOS jumper) & start over.|
The main thing to remember is to maintain the proper CPU:DRAM frequency ratio, which in your case should be 1:2. If you're currently running both the CPU & RAM at their default bus speeds, the ratio is 5:12.
All you need to do is increase the CPU frequency to 400MHz (1600MHz FSB) & configure the RAM settings so that the frequency stays at 800MHz (1600MHz DDR). The PCIe frequency should be locked at 100MHz, the PCI locked at 33.33MHz & all Spread Spectrum options (if there are any) should be disabled. If you can pull it off, the CPU will run at 3.2GHz with the ratio at the desired 1:2.