Intel plans to deliberately limit Sandy Bridge overclocking

[Johnny87au]

You still have a reference clock aka base clock and from this clock all other clock domains are sprung off. The difference is, that for mainstream SB you have locked DMI and PCIE multiplicators. So if you increase reference clock you also increase both of this clocks.

Yeh i read that increasing it by 5mhz only causes the PCIE and system to freeze, sounds crap eh