Well testing a 2.4c on p4c800e and will do 300fsb at auto. But wont 3dmark.only at 290fsb.
The Asus boards are like that, due to the thin 4-layer PCB and 2.5 phase power system. My P4C800-E boots and is 2D stable at 292 but have to drop down to 287 to be 3D stable.

On the 'Aggressive'Mode' setting, that only shows up on the 4PCA2+ boards, probably to force PAT.

You pretty much have to run at least 1.8 VAGP for stability at extreme overclocks. It's the same deal with the Epox 845PE board. I don't think it really affects the video card so much as NB.

You should always backup your clean OS using DriveImage or Ghost. It only takes 3-5' to restore it. Overdoing the ram or CPU will corrupt it real fast, on any motherboard.

Sorry, I do not have experience running over 3.36 gig on the 4PCA3+, but it's been rock stable for me on my 2.40C.

Don't underestimate the power of unbuffered bandwidth! At 'just' 277 fsb and 5:4, 2-2-2-5 on the XMS3500, I am getting 3300 unbuffered on the 4PCA3+. I am playing with a DFI 875P Infinity board now, where I can run three 2.40Cs on it at 3.5 gig on air, 3D stable! But at 3.5 gig, 292 fsb, 2800 unbuffered (due to having to run 3:2 on the ram), the 4PCA3+ is getting about the same 16M/1M SuperPi times, and it's only at 3.32 gig.