Originally posted by: lopri
For people who have a problem with FSB overclocking, don't give up at a certain FSB. Many people (including myself) like even FSB numbers and just type in 1500, 1600, 1700, etc., but you never know at which FSB the board will boot. If 1600 doesn't work, try 1596, 1604, 1610, etc. (But use even numbers, instead of odd numbers) Also note that too high a voltage for NB doesn't do any good for this board. Lowering NB voltage a notch can sometimes play a wonder.
I picked up an E6400 to see if my board is a dud or not (since FSB overclocking with my Xeon 3060 hasn't been spectacular - not that it's needed), and at first the board didn't want to boot at any FSB beyond 1600 (400FSB quad-pumped). But in less than 20 mins, I achieved the followings.
http://img155.imageshack.us/img155/9201/fsb1880sw3.png
http://img155.imageshack.us/img155/7765/fsb1920nn3.png
Board will not even post @1800/1900, but it's perfectaly fine @1880/1920. :Q
Update: Board works fine @1900FSB, too.
http://img226.imageshack.us/img226/6711/sp8mbhg4.png
First two 8M results were 'Unlinked' (async) where memory is set to 800MHz/Auto (5-5-5), and the last one is with memory 950MHz/4-4-4. Board responds to memory bandwidth/timings better than any other board I've dealt with so far.