- Joined
- Sep 22, 2004
Man... been a long time since I started a thread in the mobos section. 
But I'm just kinda scratching my head on this one...
Been reading, and read again, miahallen's guide here: http://www.overclockers.com/3-step-guide-overclock-core-i3-i5-i7/
In that guide he states the following:
"IOH is easy, if you are running a single PCIe card (graphics card), give the IOH 1.3V, if you are running more than one PCIe graphics card, give it 1.35V."
I'm running two separate setups... both with EX58-UD5 v1.0 boards and i920 chips. One with a single GTX275 (IOH @ 1.10v - default) the other with 2xGTX285 (IOH @ 1.10v - default). Both setups tested Prime95 Blend stable 24hr+ while on the test bench with a low end GPU. The GTX275 setup seems fine, no problems with IOH @ 1.10v. However, since migrating my other setup to a case and marrying it with the 2xGTX285s, it's been locking up randomly every few days and most recently I received a STOP 0x00000101 in Windows 7 x64.
So reading this guide and the advice with GPUs, it seems to be the only thing I really changed about my setup was going from a low end crap GPU to my 2xGTX285 setup.
So my question being, could the culprit be low IOH voltage?... and is 1.30~1.35v IOH safe for 24x7 365 use? I'm a Folding@Home fanatic, so this rig runs all day and all night at 100% I don't want to burn through this board in 3 months if that's what 1.30~1.35v is going to do. Or maybe I'm just not running enough QPI? I think it is tied to the GPUs however, since when entering my password to return to the desktop, the system is groggy and slow to respond. If I stop the GPU Folding clients, it immediately comes back to life again... thus, I think I may need more IOH... please, you tell me.
Here are my current settings:
But I'm just kinda scratching my head on this one... Been reading, and read again, miahallen's guide here: http://www.overclockers.com/3-step-guide-overclock-core-i3-i5-i7/
In that guide he states the following:
"IOH is easy, if you are running a single PCIe card (graphics card), give the IOH 1.3V, if you are running more than one PCIe graphics card, give it 1.35V."
I'm running two separate setups... both with EX58-UD5 v1.0 boards and i920 chips. One with a single GTX275 (IOH @ 1.10v - default) the other with 2xGTX285 (IOH @ 1.10v - default). Both setups tested Prime95 Blend stable 24hr+ while on the test bench with a low end GPU. The GTX275 setup seems fine, no problems with IOH @ 1.10v. However, since migrating my other setup to a case and marrying it with the 2xGTX285s, it's been locking up randomly every few days and most recently I received a STOP 0x00000101 in Windows 7 x64.
So reading this guide and the advice with GPUs, it seems to be the only thing I really changed about my setup was going from a low end crap GPU to my 2xGTX285 setup.
So my question being, could the culprit be low IOH voltage?... and is 1.30~1.35v IOH safe for 24x7 365 use? I'm a Folding@Home fanatic, so this rig runs all day and all night at 100% I don't want to burn through this board in 3 months if that's what 1.30~1.35v is going to do. Or maybe I'm just not running enough QPI? I think it is tied to the GPUs however, since when entering my password to return to the desktop, the system is groggy and slow to respond. If I stop the GPU Folding clients, it immediately comes back to life again... thus, I think I may need more IOH... please, you tell me.
Here are my current settings:
Code:
Advanced CPU Features:
CPU Clock Ratio ................................ [19x]
Intel(R) Turbo Boost Tech ...................... [Disabled]
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 ............................[x16]
Isonchronous Support ......................[Enabled]
Standard Clock Control:
Base Clock (BCLK) Control .......................... [Enabled]
BCLK Frequency (MHz) ................................[200]
PCI Express Frequency (MHz) ........................ [Auto]
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 ...................... [Turbo]
Extreme Memory Profile (X.M.P) ........... [Disabled]
System Memory Multiplier (SPD) ........... [8x]
DRAM Timing Selectable (SPD) ............. [Manual]
Channel A + B + C
Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ......................[8]
tRCD ..................................[8]
tRP ...................................[8]
tRAS ..................................[20]
CR.....................................[1]
Advanced Voltage Control:
CPU Intel Core i7 920 D0 Stepping
Load Line Calibration ................. [Disabled]
CPU Vcore ..............................[1.325]
QPI/VTT Voltage 1.175v .................[1.295]
CPU PLL 1.800v .........................[Auto]
PCIE 1.500v ...........................[Auto]
QPI PLL 1.100v ........................[Auto]
IOH Core 1.100v .......................[1.100]
ICH I/O 1.500v ........................[Auto]
ICH Core 1.1v .........................[Auto]
DRAM
DRAM Voltage 1.500v .............. [1.660]
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]
