I had been running the PC at 3.6Ghz for a while. I don't think it was as stable as it could have been - every now and then (although not that often) if would reset itself to defaults so there is obviously something I'm missing. I had been running at stock for quite a while more recently but when I bought the new GPU wanted to give the CPU a boost! I've tested the RAM (in fact about 18 months ago the RAM was replaced because it was faulty) & it tested fine.
Any suggestions much appreciated, I'd really like to get a little more from this CPU.
Added my rig in my sig but as its not showing up yet here it is:
Gigabyte X58 UD4P - Intel Core i7 920 - 6GB (3x2GB) Corsair XMS3 Classic, DDR3 PC3-10666 - 90Gb Vertex 2 SSD - HD7870 GPU - HX520 PSU - Noctua NHU12
Here are my settings:
CPU Clock Ratio ................................ [20x]
Intel(R) Turbo Boost Tech .................. [Enabled]
CPU Cores Enabled ............................ [All]
CPU Multi Threading .......................... [Enabled]
CPU Enhanced Halt (C1E) ................... [Disabled]
C3/C6/C7 State Support .................... [Disabled]
CPU Thermal Monitor ......................... [Enabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled]
Bi-Directional PROCHOT ..................... [Enabled]
Uncore & QPI Features:
QPI Link Speed .............................. x36
Uncore Frequency .......................... 13 << also tried 12 & 14 but 13 worked previously for me
Isonchronous Frequency ..................[Enabled]
Standard Clock Control:
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) .....................[180]
PCI Express Frequency (MHz) ........... [100]
C.I.A.2 [Disabled]
Advanced Clock Control:
CPU Clock Drive ..............................[800mV]
PCI Express Clock Drive ................... [900mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]
Advanced DRAM Features:
Performance Enhance ...................... [Standard] << Also tried Turbo
System Memory Multiplier (SPD) ........ [Manual] 6
DRAM Timing Selectable (SPD) .......... [MANUAL]
Set to [Expert]
SET TIMINGS MANUALLY TO 9-9-9-24
Memory Frequency 1066 1080
Advanced Voltage Control:
CPU
Load Line Calibration ...............[Enabled]
CPU Vcore ...............................1.312 << Also tried 1.35
QPI/VTT Voltage 1.150v ............1.2 << Also tried 1.25
CPU PLL 1.800v ........................1.84
MCH/ICH
PCIE 1.500v ...........................1.5 [AUTO]
QPI PLL 1.100v .......................1.1 << Also tried a little more here
IOH Core 1.100v .....................1.24
ICH I/O 1.500v .......................1.5 [AUTO]
ICH Core 1.1v ........................1.14
DRAM
DRAM Voltage 1.500v ..............1.5 [MANUAL] << Tried 1.55