Just want to offer some encouragement for people running 8 GB on this board.

It can be done, albeit sometimes a PITA.

This is with my new OCZ Platinums.






Current settings:

Overclock tuner: Manual
CPU Ratio Setting: 9
FSB Strap to North Bridge: 266
FSB Frequency: 456
PCI-E Frequency: 100
DRAM Frequency: 1140
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information:

CAS# Latency: 5
DRAM RAS# to CAS# Delay: 5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge: 15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO (set very loose initially - 55+)
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd & 3rd Information:
all AUTO
But a note, i've had success getting higher speeds with 8 GB by loosening these to one looser (set manually).
Default AUTO is too tight for some 4x2 GB configurations, especially my previous Mushkin 8 GB @ higher speeds.

DRAM Static Read Control: Disabled
DRAM Read Training: Disabled
MEM. OC Charger: Enabled
AI Clock Twister: Lighter (this is hugely important for 8 GB...i generally have to do Light or Lighter)
Peformance Level: 8


CPU Voltage: 1.24375
CPU GTL Voltage Reference (0/2): 0.645
CPU GTL Voltage Reference (1/3): 0.645
CPU PLL Voltage: 1.54
FSB Termination Voltage: 1.26
DRAM Voltage: 1.8
NB Voltage: 1.28
NB GTL Reference: 0.64
SBridge Voltage: 1.1
PCIE SATA Voltage: 1.5

Load Line Calibration: Enabled
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto


Notice how low i've kept the motherboard voltages?

You really do not need a ton of vFSB or vNB on this board.
It's very much a finesse mobo though.
Brute forcing by using higher voltages pretty much never works...believe me, i've tried.
If you spend time with it, get your vFSB & vNB & GTL perfect (and yes, they have to be perfect or you will get nowhere), it's not bad.

I actually sold my UD3P because i found for 8 GB, my P5Q-D was a more solid board, a lot less flakey.
For 2x2 GB, no question, UD3P is miles better.
But at least for me, my P5Q-D i much preferred for 8 GB.