i7-920 can not get to 4GHz

Slacken your timings off to 9-9-9-24 CMD - 2 just to eliminate your memory from the failures for the time being.
 
didgemaster said:
Multiplier set to x21 blk set to 191, QPI 1.375 and Vcore 1.375 temperatures will hit 81ºc maximum

With 1.7 pll I'm getting temperatures around 70ºc

with 1.6 pll it was stable for arond 20 mins
Click to expand...

Apologies I had this wrong - temps are still around 80ºc not 70ºc

I am trying the new memory timings with 1.7 pll as it seems more stable. I will go to 1.8 pll should it be unstable
 
I'd recommend testing with both Prime95 and LinX (all memory) and I've had overclocks that fail on one or the other but not both. If you Fold bigadv you want to make sure it is stable before folding again as too many failed WUs will dry up the supply of bigadv units. Although frankly nothing stresses an over clock quite like folding so it works well as a final stress test.

I've found 191x21 easier to get to than 20x200, also once it is stable remember you can restore most of the CPU feature settings like speed step without issues which will reduce your power consumption at idle.
 
OK Something strange is happening....For some reason, lets call it divine inspiration!! :) I decided that with the new memory settings (9-9-9-24) and 1.7 pll I hadn't had the QPI on lower settings so My new settings are as follows

Advanced CPU Features:
CPU Clock Ratio ................................ [21x]
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 ......................... [Disabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled]
Bi-Directional PROCHOT ..................... [Enabled]


Uncore & QPI Features:
QPI Link Speed .............................. x36
Uncore Frequency .......................... x16
Isonchronous Frequency ..................[Enabled]


Standard Clock Control:
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) .....................191
PCI Express Frequency (MHz) ........... [100]

C.I.A.2 [Disabled]

Advanced Clock Control:
CPU Clock Drive ..............................[900mV]
PCI Express Clock Drive ................... [800mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]


Advanced DRAM Features:
Performance Enhance ...................... [Standard]
Extreme Memory Profile (X.M.P) ......... [Disabled]
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 ......................9
tRCD .......................................9
tRP .........................................9
tRAS .......................................24


##Channel A Advanced Timing Control##
tRC ........................................ [auto]
tRRD ....................................... [auto]
tWTR ...................................... [auto]
tWR ........................................ [auto]
tWTP ....................................... [auto]
tWL ........................................ [auto]
tRFC ....................................... [auto]
tRTP ....................................... [auto]
tFAW ...................................... [auto]

Command Rate (CMD) ................ [auto]

##Channel A Misc Timing Control##
Round Trip Latency ...................
B2B CAS Delay ..........................


Advanced Voltage Control:

CPU
Load Line Calibration ................. [Enabled]
Dynamic Vcore (DVID) ............... [Normal]
CPU Vcore ............................... 1.375v
QPI/VTT Voltage 1.150v ............1.315v
CPU PLL 1.800v ....................... 1.7v

MCH/ICH
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 .............. 1.66v
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]

Wit the above settings I am now 4 hrs and 20 min stable and counting!! I will up date when either it fails or this evening if it is still going. Temps are at 83ºc peak (2 hrs ago)
 
Hi,

I have been following this thread closely.

I need help as I don't know what I am doing wrong

These are the following settings approximately:

RAM settings - System Memory Miltiplier (SPD) - 8.0. Everything else on auto or how it was before...

CPU clock ratio - 21x
QPI clock ratio - Auto
Uncore clock ratio - Auto
BCLK - 191
Performance Enhance - Standard
Load Line Calibration - Enabled

CPU Vcore - 1.26250V
QPI/Vtt Voltage - 1.300V
IOH Core - Auto
DRAM Voltage - Auto
CPU PLL - Auto

Now, the pc boots up, the windows logo is shown and passed, but then after I enter my password to go to the desktop, it freezes during the welcome (never makes it to the desktop).

I tried Vcore to 1.25 and I made it to the desktop for about 5 seconds, then it froze as well. Same happened with 1.275V Vcore (never made it to desktop).

I did not have one BSOD but only freezing and the only thing left to do is hard reset.

Any help please? As this is my first time overclocking and I'm lost!

Also The spec is in sig... so i7 920 D0 and gigabyte EX58-UD5 and Corsair Dominator 1600MHz

Thanks
 
Well it was too good to last it all froze at 4.5 hrs - I have tried reducing the QPI and so far I'm at 30 mins......

Nameless 87 - I'm probably not the best person to ask considering the issues that I have been having, maybe you could copy my BIOS settings or did you read the guide linked to at the start of this thread? Link
 
didgemaster said:
surely you mean "not on" ;)
Click to expand...

lol :p

cjgardens said:
Your temps are on the high side. Bump the vcore up more mine needed more than that for 4ghz. You might have a bad chip like i did
Click to expand...

80 is fine under Prime95/LinX.

Nameless_87 said:
snip
Click to expand...

It is possible you are not giving it enough QPI voltage, with certain 920s I've seen the memory controller needs a lot more voltage than the chip itself, especially with ram running at near 1600MHz. Up QPI in stages until it boots properly, then stress test.

didgemaster said:
Well it was too good to last it all froze at 4.5 hrs - I have tried reducing the QPI and so far I'm at 30 mins......
Click to expand...

I've actually not had much freezing when overclocking, it is more BSOD or random restarts. Make sure you have Auto Restart off as well so if it does BSOD you can see the code. Good guide on the codes here if it does: http://www.overclock.net/general-pr...0091-complete-list-bsod-codes-when-ocing.html

I've had some strange chips in my time as well, overclocking one at the moment that requires silly QPI to get it to not BSOD under stress. If you keep getting the issues either lower the ram divider or up the QPI to see if that helps.
 
Something you should keep in mind is that not all chips will do 4ghx, i have had 5 i7 chips all did 4ghz except 1 which would do 3.8 and not for 4ghz even with 1.4vcore. That was on asus rex 3 so the board is well capable. On my gig rig i used 1.6pll without problems for 2 years
 
Speed said:
I've actually not had much freezing when overclocking, it is more BSOD or random restarts. Make sure you have Auto Restart off as well so if it does BSOD you can see the code. Good guide on the codes here if it does: http://www.overclock.net/general-pr...0091-complete-list-bsod-codes-when-ocing.html

I've had some strange chips in my time as well, overclocking one at the moment that requires silly QPI to get it to not BSOD under stress. If you keep getting the issues either lower the ram divider or up the QPI to see if that helps.
Click to expand...

The same codes are in the overclocking page I linked at the start of the thread - but thanks all the same. I would love to be getting some BSODs then at least I would have some guidance on what needs changing. I have had QPI to 1.375 I don't know if I want to push it harder than that so maybe I'll try the divider if I get no joy playing round with lowering the QPI. Just out of interest what is the max QPI I should push to?
 
BigBruiserAl said:
Something you should keep in mind is that not all chips will do 4ghx, i have had 5 i7 chips all did 4ghz except 1 which would do 3.8 and not for 4ghz even with 1.4vcore. That was on asus rex 3 so the board is well capable. On my gig rig i used 1.6pll without problems for 2 years
Click to expand...

Yeah it would be a little annoying if I can't reach 4GHz but I really want to be sure I can't get 4GHz before I give up. I know that if I can't get there I'll start looking at the sandy bridges or a bulldozer and I really can't justify spending money on those at the moment with all the expenses of a new house and new daughter
 
BigBruiserAl said:
Something you should keep in mind is that not all chips will do 4ghx, i have had 5 i7 chips all did 4ghz except 1 which would do 3.8 and not for 4ghz even with 1.4vcore. That was on asus rex 3 so the board is well capable. On my gig rig i used 1.6pll without problems for 2 years
Click to expand...

I've yet to find a D0 that didn't do 4GHz and I've owned loads. I expect like you say you do get the odd chip that struggles.

didgemaster said:
The same codes are in the overclocking page I linked at the start of the thread - but thanks all the same. I would love to be getting some BSODs then at least I would have some guidance on what needs changing. I have had QPI to 1.375 I don't know if I want to push it harder than that so maybe I'll try the divider if I get no joy playing round with lowering the QPI. Just out of interest what is the max QPI I should push to?
Click to expand...

Well lets put it this way, on the system I'm overclocking at the moment I have it at 1.44 otherwise it just isn't stable. I'm still tweaking but anything sub 1.5 is safe as far as I'm aware. Some of the 920s are dire, however most of the random reboots I'm finding are down to a lack of QPI not vcore, vcore tends to cause BSODs. Put it at 1.4 and see if it is stable under LinX All Memory and Prime95 Blend.

I've yet to find a programe that can read QPI voltage in Windows which is annoying, I had no end of problems until I put QPI on Auto. No doubt it was using silly voltage, but it was stable and it would have been good to know what it was using as a starting point. Still trial and error got their in the end.
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom