don't forget to play with the other voltages. GTL reference voltages and northbridge voltages etc, it's been a while so I can't quite remember all the settings that I used to get my old Q9550 to 4ghz at 1.36v but GTL refs made all the difference in stability. I had an Asus P5Q Deluxe which was one of the better P45 boards though, so I'm not even sure if you can change those settings on your board.
this post is similar to my settings for 4ghz on my Q9550, http://www.overclock.net/t/410403/p5q-deluxe-q9550-4ghz/0_100#post_4947831
it applies to your's as well but won't need to push things as far, just gives you an indication of what voltages need to be changed. don;t do this unless you are aware of the risks, and accept the fact that your mobo and PSU may not be able to handle it, 3.6ghz should be possible though. (just a note Q9650 and 9550 have diff multi, so yours is .5 higher multi I think, so don't go applying 471FSB for giggles
unless you want smoke and fire)
your FSB voltage, PLL voltage and NB voltage can probably be kept lower than this, and your CPU cooling may not be up to 1.36v+ (I was on custom water cooling, max temps in high 50"s *c) with your other voltages dialled in though you should be able to drop you vcore to 1.3ish i think. Also I had massive problems getting an overclock stable with 4 sticks of ram in. 2 sticks of ram is rock solid, 4 sticks is unpredicatable, sometimes fine, sometimes won;t even boot. try it with just 2 sticks of ram, and play with all your GTL refs and NB voltages etcEdited by LiamG6 - 11/24/15 at 8:26pm