The BIOS I'm testing is "not so good" so things are a little iffy. For instance I cannot know if its my RAM making it reboot, my NB or just the CPU (RAM/NB cannot go lower than stock 1066 and 9x with this BIOS)
9600BE;
Max so far booted at low HT/CPU multi is 220HT ref. (9x NB multi though)
Max so far booted at stock CPU/NB/HT multi is 206HT ref. (more does not boot fully)
Any more than 220 HT ref. through AOD will freeze/reboot the system (regardless of volts/vid/multi). There definitely seems a limit, I'm not kidding when I say these look like the reject 9900. This one does not go above 2530MHz, from fully stable at >1.25VID 1.32V to instantly totally unstable at <1.5VID 1.48V. This one also hates above 12.5x multi, no boot and instant reboot with AOD.
Max fully stable so far is this:
http://valid.x86-secret.com/show_oc.php?id=296574
CPU: 2530MHz
NB: 2200MHz
HT: 2200MHz
RAM: 587MHz 5-5-5-15 2T
HT ref: 220MHz
I'm going to run the stability test of that for longer overnight before screening. 1hr passed quite easily at CPU 1.25VID 1.34V.
This is the second one I had fully stable: CPU 2415MHz, NB/HT 2100MHz, RAM 560MHz 5-5-5-15:

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