I have a i7 920 D0 w/ a GA-X58A-UD3R and Corsair 1600 3x2GB. I was able to get to 3.8Ghz really easily but I haven't been able to get to 4.0 or 4.2GHz. Temps are fine, typically 62-64C Max under 100% load (Prime95). Once I go to CPU ratio of 20 or 21 the machine will freeze on Prime95 after just a 1-2 seconds, sometimes then followed by a BSOD, so it posts and boots but no 100% load. I figured its the vCore and I've gone up to 1.33125 and still hasn't improved.
Any tips where to go next? Seen comments about lower CPU PPL. Could raise vCore and QPI/VTT more as well.
My stable 3.8Ghz settings are below:
Advanced CPU Features:
CPU Clock Ratio ................................ [19 ]
Intel(R) Turbo Boost Tech ................. [Disable]
CPU Cores Enabled .......................... [All]
CPU Multi Threading ..........................[Enable]
CPU Enhanced Halt (C1E) ................. [Disable]
C3/C6/C7 State Support ................... [Disable]
CPU Thermal Monitor ........................ [Enable]
CPU EIST Function ............................ [Disable]
Virtualization Technology ................. [Disable]
Bi-Directional PROCHOT .................... [Enable]
Uncore & QPI Features:
QPI Link Speed ..............................[x36] 7.2GHz
Uncore Frequency ..........................[x17] 3400MHz
Isonchronous Frequency ...............[Enable]
Standard Clock Control:
Base Clock (BCLK) Control .................. [Enable]
BCLK Frequency (MHz) .........................[200]
PCI Express Frequency (MHz) ............. [100]
C.I.A.2.................................................. [-]
Advanced Clock Control:
CPU Clock Drive ..............................[800]
PCI Express Clock Drive ................ [900]
CPU Clock Skew ............................ [0]
IOH Clock Skew ............................. [0]
Advanced DRAM Features:
Performance Enhance .......................... [Standard]
Extreme Memory Profile (X.M.P) ........... [Disable]
System Memory Multiplier (SPD) ........... [ 8]
DRAM Timing Selectable (SPD) ............. [Quick]
Channel A + B + C
Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ..................[8]
tRCD ......................................[8]
tRP ........................................[8]
tRAS ......................................[24]
CR..........................................[2]
B2B........................................[-]
Advanced Voltage Control:
CPU Intel Core i7 920 D0 Stepping
Load Line Calibration .................... [Standard]
CPU Vcore ......................................[1.275]
QPI/VTT Voltage 1.150v .................[1.295]
CPU PLL 1.800v ..............................[1.80]
PCIE 1.500v ...................................[AUTO]
QPI PLL 1.100v ..............................[AUTO]
IOH Core 1.100v ............................[AUTO]
ICH I/O 1.500v ...............................[AUTO]
ICH Core 1.1v ................................[AUTO]
DRAM
DRAM Voltage 1.500v .............. [1.64]
DRAM Termination 0.750v.......... [AUTO]
Ch-A Data VRef. 0.750v ...........[AUTO]
Ch-B Data VRef. 0.750v ...........[AUTO]
Ch-C Data VRef. 0.750v ...........[AUTO]
Ch-A Address VRef. 0.750v ........[AUTO]
Ch-B Address VRef. 0.750v ........[AUTO]
Ch-C Address VRef. 0.750v ........[AUTO]
Any tips where to go next? Seen comments about lower CPU PPL. Could raise vCore and QPI/VTT more as well.
My stable 3.8Ghz settings are below:
Advanced CPU Features:
CPU Clock Ratio ................................ [19 ]
Intel(R) Turbo Boost Tech ................. [Disable]
CPU Cores Enabled .......................... [All]
CPU Multi Threading ..........................[Enable]
CPU Enhanced Halt (C1E) ................. [Disable]
C3/C6/C7 State Support ................... [Disable]
CPU Thermal Monitor ........................ [Enable]
CPU EIST Function ............................ [Disable]
Virtualization Technology ................. [Disable]
Bi-Directional PROCHOT .................... [Enable]
Uncore & QPI Features:
QPI Link Speed ..............................[x36] 7.2GHz
Uncore Frequency ..........................[x17] 3400MHz
Isonchronous Frequency ...............[Enable]
Standard Clock Control:
Base Clock (BCLK) Control .................. [Enable]
BCLK Frequency (MHz) .........................[200]
PCI Express Frequency (MHz) ............. [100]
C.I.A.2.................................................. [-]
Advanced Clock Control:
CPU Clock Drive ..............................[800]
PCI Express Clock Drive ................ [900]
CPU Clock Skew ............................ [0]
IOH Clock Skew ............................. [0]
Advanced DRAM Features:
Performance Enhance .......................... [Standard]
Extreme Memory Profile (X.M.P) ........... [Disable]
System Memory Multiplier (SPD) ........... [ 8]
DRAM Timing Selectable (SPD) ............. [Quick]
Channel A + B + C
Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ..................[8]
tRCD ......................................[8]
tRP ........................................[8]
tRAS ......................................[24]
CR..........................................[2]
B2B........................................[-]
Advanced Voltage Control:
CPU Intel Core i7 920 D0 Stepping
Load Line Calibration .................... [Standard]
CPU Vcore ......................................[1.275]
QPI/VTT Voltage 1.150v .................[1.295]
CPU PLL 1.800v ..............................[1.80]
PCIE 1.500v ...................................[AUTO]
QPI PLL 1.100v ..............................[AUTO]
IOH Core 1.100v ............................[AUTO]
ICH I/O 1.500v ...............................[AUTO]
ICH Core 1.1v ................................[AUTO]
DRAM
DRAM Voltage 1.500v .............. [1.64]
DRAM Termination 0.750v.......... [AUTO]
Ch-A Data VRef. 0.750v ...........[AUTO]
Ch-B Data VRef. 0.750v ...........[AUTO]
Ch-C Data VRef. 0.750v ...........[AUTO]
Ch-A Address VRef. 0.750v ........[AUTO]
Ch-B Address VRef. 0.750v ........[AUTO]
Ch-C Address VRef. 0.750v ........[AUTO]