845d overclocking troubles...

[athlonrig]

I have had a p4b266 and a bd7-raid (current board) and a soyo p4s dragon. Out of the three the soyo based on the sis 645 chipset has taken my 1.8a to almost 2.7 using a swiftech air cooler. the two 845d boards seem run pretty stable at 133, but anything higher and they crap out stability wise. Who here has a 845d board signifigantly over 133? I know there are two reviews where they hit 170+, but I can't seem to get over 133 stable. Im going to try putting a fan on the 845d chipset heatsink...it seems to get VERY hot.