Hey all,

I just got my UD3P today to replace my P5Q Pro and so far it's been much better and I can actually OC for once. So far I've gotten to 500 x 8 on my E8400 and things seem to be stable so far. Here's my settings

E8400 500 X 8 4000MHz F9 BIOS

Robust Graphics Booster.........................[ Auto ]
CPU Clock Ratio.................................[ 8 ]
Fine CPU Clock Ratio............................[ 0.0 ]
CPU Frequency 4.0GHz...........................[ 500 x 8.0 ]

******Clock Chip Control******

CPU Host Clock Control..........................[ Enabled ]
CPU Host Frequency (Mhz)........................[ 500 ]
PCI Express Frequency (Mhz).....................[ AUTO ]
C.I.A 2 ..................................................[Disabled]

******Advanced Clock Control******

CPU Clock Drive.................................[ 700mv ]
PCI Express Clock Drive.........................[ 700mv ]
CPU Clock Skew..................................[ 0ps ]
MCH Clock Skew..................................[ 0ps ]

******DRAM Performance Control******

Performance Enhance .............................[Standard]
Extreme Memory Profile (XMP)....................[ Disabled ]
(G) MCH Frequency Latch.........................[ 333MHz ]
System Memory Multipler.........................[ 2.00B ]
Memory Frequency 1066...........................[ 1000 ]
DRAM Timing Selectable..........................[ Manual ]

CAS Latency Time................................[ 5 ]
tRCD............................................[ 5 ]
tRP.............................................[ 5 ]
tRAS............................................[ 15 ]

******Advanced Timing Control******

tRRD............................................Au to
tWTR............................................ Auto
tWR............................................. Auto
tRFC............................................[ 52 ] Auto
tRTP............................................ Auto
Command Rate (cmd)..............................[ 2 ]

******Motherboard Voltage Control******

Load-Line Calibration [Enabled]
CPU Vcore [ 1.25 ]...................[ 1.26875 ] (1.232 cpu-z)
CPU Termination [ 1.20 ]...................[ 1.28 ]
CPU PLL [ 1.50 ]...................[ 1.57 ]
CPU Reference [ 0.760 ]...................[ 0.810 ] Easytune says .760?

MCH Core [1.1 ]...................[ 1.28 ]
MCH Reference [0.760 ]...................[ 0.746 ] Easytune says .700?
MCH/DRAM Refernce [0.900 ]...................[ Auto ]
ICH I/O [1.500 ]...................[ Auto ]
ICH Core [1.100 ]...................[ Auto ]

DRAM Voltage [1.800 ]...................[ 2.100 ]
DRAM Termination [0.900 ]...................[ Auto ]
Channel A Ref [0.900 ]...................[ Auto ]
Channel B Ref [0.900 ]...................[ Auto ]

******Advanced BIOS Features******

Limit CPUID Max to 3............................[ Disabled ]
No-Execute memory Protect.......................[ Disabled ]
CPU Enhance Halt (CIE)..........................[ Disabled ]
C2/C2E State Support............................[ Disabled ]
C4/C4E State Support............................[ Disabled ]
CPU Thermal Monitor.............................[ Disabled ]
CPU EIST Function...............................[ Disabled ]
Virtualization Technology.......................[ Disabled ]
So, after Blend and small FFT was stable in prime for 1-2 hours I decided to try 8.5 multi and bumped vcore. Primed again on small FFT and no errors but blend would eather error or bsod between 1-10 minutes. I tried various MCH voltage and vtt as well as MCH reference and can't get it stop bsoding or erroring. Must be the extra CPU speed causing something. Any ideas? I also tried 50-100ps CPU clock skew.

Gigabyte UD3P Rev1.11 F9 BIOS
E8400 E0
Powercolor 4850
G.skill DRR2-1000 2x2GB 5-5-5-15 45 2T