Gave up on the QX9650, it seems to dislike high FSB with 4 cores enabled...

Still chasing the Holy Grail of 500 MHz FSB on a quadcore, it's time to move onto the Xeon X3380...

X3380 ALL 4 CORES - FSB 491 MHz (1964 MHz QDR) w/8GB RAM





X3380 491 MHz FSB P1 & P2 Auto (Poor chipset latency & bandwidth)



Close but no cigar.

Fails to boot into Windows above 1964 (will POST though).

BIOS settings for 491 MHz FSB;

1964:1637 (FSB:RAM)
Vcore 1.45V LLC enabled (1.488V)
PLL 1.60V (1.64V)
VTT 1.40V (1.45V)
VDIMM 1.64V (1.71V)
NB 1.58V (1.60V)
SB 1.60V (1.58V)
NB GTL -20mV
CPU GTL 0 -95mV
CPU GTL 1 -56mV
CPU GTL 2 -56mV
CPU GTL 3 -95mV
P1 & P2 Auto