4GHz i7 920 D0, but only on 19x

uncore freq = (System memory multiplyer SPD x 2) + 1
so
uncore freq = (8 x 2) + 1
which is 17 :)
the ram i would set manually, if you can get it stable and want to tweak it a bit then thats the time, but get the cpu side stable first.
 
someone elses settings.
Turbo Boost
OCUK 3.4 Disabled
My 3.8 Enabled to give x21
BCLK Control
OCUK 3.4 Enabled
My 3.8 Enabled (of course)
BCLK Frequency
OCUK 3.4 170
My 3.8 180 (21x180= 3.78GHz)
PCI Frequency
OCUK 3.4 101 (?)
My 3.8 101
CPU Clock Drive
OCUK 3.4 900mV
My 3.8 800mV
PCI Express Clock Drive
OCUK 3.4 900mV
My 3.8 900mV
Performance enhance
OCUK 3.4 Standard
My 3.8 Standard
System Memory Multiplier
8 for both
Timings
OCUK 3.4 9,9,9,28 (?)
My 3.8 9,9,9,24
DRAM Timing Selectable
Quick for both
QPI Link and Uncore
Auto for both
Load Line Calibration
Enabled for both
CPU Vcore
OCUK 3.4 1.30000V
My 3.8 1.28125V (Yes.... lower!)
IOH Core
1.22V for both
All other voltages AUTO
Click to expand...
 
mkohman said:
well I am going to do a 4.0GHZ too.. lol no point of buying all this gear and not overclocking it so be it :)

I am going for these settings:

multiplier 21 x
bclk 191
ram timings 9-9-9-24
turbo enabled
I will disable eist c1/c6.. and all that whilst overclocking then enable after stable.
vcore starting point will be 1.2 and work my way up
CPU Vcore 1.200V and maybe more depends if its steady..
QPI/VTT coltage 1.295v
IOH Core 1.16V
DRAM Voltage 1.640v

lets say I need to up the voltage.. which voltage do I need to go for the vcore or the qpi ? and also how do I know if the vdimm has enough volts on 1.64?

Thanks
Click to expand...

the dram (vdimm) should be as stated or as close to, the number on the sticker on the ram. the only one that needs to change is the vcore, i would start at 1.3 and go down, rather than going up, that way you will know all the other settings are stable, if you start low and try to go up, it could be something else making it crash and you will miss you vcore min limit.
 
mkohman said:
so .. let me get this straight.. shall I put my ram multiplier to 6 x and set the timings or leave them on auto .. and then do the oc of the cpu with vcore at 1.30000 and then work my way down only on the vcore whils leaving the QPI/VTT coltage 1.295v, IOH Core 1.16V, DRAM Voltage 1.640v?
Click to expand...

the best thing with ram is to go in low to make sure it doesnt effect the stability, trying to go too high will compromise an accurate stability test.

mkohman said:
say I got it to load to windows at 1.30000 do I do prime 95 or drop and then keep dropping the vcore or do i do prime 95 for an hour on every time I drop the vcore? thanks
Click to expand...

i normally start at 1.3v and load into windows, do a 30-45min OCCT test, then lower it again, do another 30-45min test with OCCT until i hit unstability. then i go back to my last stable setting and do an 8hour OCCT test, if that fails then up it a bit more until i do get an 8hour OCCT without errors. then i normally spend an hour or 2 playing some games and doing a bit of video work to make sure its stable doing what i do, then maybe a 3dmark 06 and vantage test. once all those are done then im pretty sure its stable so i either leave it, or go for more, although 4GHz is as high as i will try. once you are happy its stable, then start doing some ram settings, remembering before booting into windows do the memtest86+ scans, as i have in the past corrupt windows by trying to boot with an unstable oc.
 
mkohman said:
hmmm .. well I am even more confused now lol .. so I when I first start out shall I have my vdimm volts still as high as 1.64? or lower and also at what stage do I boot the memtest86+ scans? after every tweak?
Click to expand...

well ram is a personal thing, if you are unsure, set the ram up as the sticker states, then do a memtest86+ if that passes ok, do your cpu overclock and run memtest86+ again, if it still passes, then thats it, no more memtest86+ scans. if it fails, then lower the ram settings until it passes memtest86+. personally i prefer to get the cpu sorted first as the max oc will effect the ram possibilites.
 
the_electrician said:
did you update your bios to the latest FE release?
As i found the latest version allowed me to lower my vcore and qpi to get a stable overclock that wasnt achievable on the previos bios.
Click to expand...

yeah running the FE bios and it did an 8.5hours OCCT test without errors last night, and have been using it the past 2 days so i am happy its pretty stable. will have a play with the ram settings when i get chance.
 
Code: 
CPU Clok ratio 19x
QPI Link speed x36 (7.2GHz)
Baseclock 211
Performance Enhance - standard
XMP disabled
System memory multiplyer SPD - 6.0
intel turbo boost - disabled
Cpu cores enabled - all
CPU multithreading - enabled
C1e , C3/c6/c7, thermal, EIST and PROCHOT all disabled
Virtualization - enabled.
Uncore freqency x13
Isochronous supprot - enabled
PCI frequency - 100
CIAZ -disabled
CPU clockdrive 800Mv
PIC Express clock drive 900Mc
CPU cliock skew 100ps
IOH clock skew 0ps

Local-line calibration - disabled
CPU Vcore 1.250V
QPI/VTT coltage 1.295v
IOH Core 1.16V
DRAM Voltage 1.640v

everthing else is as at default / auto

is there anything i can easily tweak to get better performance as this is the best way i have got 4GHz stable. is running at 19x slowing the total oc down?
 
anyone?
is there a way on this mobo to have the fans on full speed perminantly?
are my skew and clock drive settings ok, or can i improve them? (is lower better?)
also, do i need to change the qpi link speed if i change to x21 multiplier?
 
Code: 
CPU Clok ratio 19x
QPI Link speed x36
Baseclock 211
Performance Enhance - standard
XMP disabled
System memory multiplyer SPD - 8.0
intel turbo boost - disabled
Cpu cores enabled - all
CPU multithreading - enabled
C1e , C3/c6/c7, thermal, EIST and PROCHOT all disabled
Virtualization - enabled.
Uncore freqency x16
Isochronous supprot - enabled
PCI frequency - 100
CIAZ -disabled
CPU clockdrive 800Mv
PIC Express clock drive 900Mc
CPU cliock skew 100ps
IOH clock skew 0ps

Local-line calibration - disabled
CPU Vcore 1.250V
QPI/VTT coltage 1.295v
IOH Core 1.16V
DRAM Voltage 1.640v

everthing else is as at default / auto

right managed to get the ram up a bit, its also now set to 9-9-9-24-2 is this ok or is it worth seeing if i can lower them a little bit?
 
is this an ok score for the settings i have chosen?

passmark.png
 
you got better (more) ram than me, and the ssd will help so overall cant be too bad i guess. just wish i new more about ram timings, qpi, clockdrives and stuff to see if i can get more out of it. i have a stable 4GHz so now just need help in tweaking the settings that i may of got wrong to get the most i can out of what i have.
 
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