voltage question

qwertylives

qwertylives

qwertylives

Associate
Joined
22 Aug 2010
Posts
52
Location
walsall
hi,im trying to overclock my i7 930 and after reading through various guides i decided to try and build to roughly 4.0mhz in small steps,i used cpuid to note some temps,volts ect running standard spec b4 i started.first off i have just done my 1st overclock to 3.4mhz and ive been running prime95 for around 2hrs(still running) to check stability,this is where i need help,when i noticed my volts running standard i was using roughly 1.216-1.224v(@2.8mhz),but since overclocking my volts seem to be using less (currently pulling 1.168 @ 3.4hmhz) i was under the impression you used more volts as your overclock increases?sorry if its a noob question but as im an oc virgin i just wanna make sure everything is right,thanks.

posted a screenie if that makes things clearer:

cpuid.jpg
 
Are you setting the vcore manually in the bios, or using auto? Im gonna guess manually especially if going by guides.

As when it was stock it would have been set to auto, and generally giving it more vcore then was needed.

Aslong as it dos'nt error when running prime don't worry about it, and keep testing, try and stay under 80c max on the cores, so you still have a fair bit of head room to go, on both volts and temps.
 
thanks for the advice,do you think its best setting vcore back to auto then before i try to increase anymore?or just crack on ?im sure i set my vcore to 1.2665 although im not 100% without going back into the bios.
 
Nah stay away from Auto for the vcore, and qpi, best to set them manually, does take more testing though, but far better.

If you set the vcore to that, and its showing as what it is underload in windows, then thats probably without Load Line Calibration turned on.

If you turn that on, you will be getting basically what u enter in the bios. But yeh all seems fine, so carry on testing away. There will always be help here from myself and others if its needed.

Oh at some point post your full spec, incase its needed further on.
 
thanks a lot,im done for tonight but will continue to test tomorrow,guess ill post then,thanks once again!
spec is:

intel i7 930 do + zelman extreme cpu cooler with home made mod for push n pull
Asus P6X58D-E motherboard
Nvidia Gtx 480
Corsair Dominator 6GB 1600MHz Triple Channel Kit
Akasa freedom power 1000w Modular psu
Samsung spinpoint 1tb hd
Lg Blu-ray and dvd rw drive
Antec 902 case with 2 optional 120mms attached
 
Last edited:
hi just another question,i have managed to get a stable 4ghz out of her now,however i tried to up the base clock to 200 to try and see if i could run 4.2 (im running a x21 multi) but my dram frequancy changed,atm running 4ghz its on 1588(or similar forgot exactly) but when i increase the base clock i dont get this option anymore,just 1253(not exact) and 1603,i didnt want to set it to 1603 as thats over my 1600mhz ram so i went with the 1253 setting,loaded up windows,ran prime and it froze instantly,is it safe to try the 1603hz value for my dram or have i missed something else? cheers and sorry if that doesnt explain itself properly.
 
You can comfortable choose the 1603 option, as thats what mine uses and had no issues, using around the 1600 mark is fine, just don't go mega over like 1700/1800 without testing to see if the memory can handle it. But 1603 is fine.

The reason it was unstable at 4.2 is that u would need to up the vcore abit, it won't be the memory, just its lacking vcore to run 100% at 4.2, but it booted so thats a start, so just raise the vcore abit and keep testing.
 
thanks bif,slowly but surely getting there,whats the max temps you recommend running under 100% load?i was thinking i didnt want to go above say 85degrees,but im sure i read somewhere some guy say 100degrees was safe while running prime95 on an i7,just curious as to where you stand on this as ill just listen to what u recommend and aim for no higher than that.
 
Ideally the lower the temps the better, but you will be fine upto 85c on the cores, any higher really is getting to close to the limit. The other person was right u can technically go to 100c before thermal throttling kicks in, but its best not to think like that, set yourself a lower target like 85c, and stick below that, to be on the safe side.

Also remember there is not many things that will cause 100% load like prime, so day to day load temps will be far lower.
 
just had a crash trying 4.2,got this message on a blue screen amongst other text.

*A clock interrupt was not received by the secondery processor within the allocated time interval*,any ideas what casues this?ill post a my settings(used for the 4.2 attempt)so you can see if anything is standing out as a fail.

cpu volts 1.31875
qpi/dram 1.20000
cpu pll voltage 1.88
ioh 1.20
ich 1.20
dram 1.66
LLC enabled
cpu spread spectrum disbaled
turbo disabled
and finally using a bclk of 200 using a x21 multi=4200

sorry for being noob.
 
Last edited:
Change the qpi to 1.3, Cpu Pll to 1.80. And then test again, if it still fails/BSOD's then up the vcore abit more.

But at this point id have to say its the lack of qpi thats the issue.

Edit:

Put everything on auto, or turn off like in my screen shots here http://forums.overclockers.co.uk/showpost.php?p=17258847&postcount=25

Then all you will need to be changing is multiplier, bclk, vcore, qpi. Makes it a lot easier when only changing a few things. Ignore my settings for vcore and the like, the screen shots are just there to aid in what to turn off, what to leave on auto and the like.

But it deffinatly looks like you need more qpi, so whack that to 1.3 and test again.
 
Last edited:
howd you get your dram bus to 1.65 lol? 1.64-1.66 is all i see and i have the same mobo,im currently running 1.66.and ill give those settings a try as ive been testing various settings and just cant get 4.2 stable atm
 
Im using the latest bios 0303, most ship with this one now, but depends when you bought.

If it won't let u enter 1.65, then you are probably on the early bios, its still good so don't worry. Or if u wanted you can update to 0303, just go to the asus global site, find the mobo, and select the bios file.

Save it somewhere on ur hard drive, that u know is easy to get to, then reboot, and hit the key at boot up for EZ Flash 2, then follow onscreen stuff, and locate the file from the place u saved it, and let it flash the bios.
 
cheers for the advice,currently running prime @ 4.2,touch wood all's good so far like 30mins in,temps a tad on the high side with the hottest core maxing at 98 and running mid 90s stable(hottest core max=98,coolest core max=90degrees)if prime survives for 90mins ill try dropping my voltage to reduce those high temps.
 
Ouch thats high temps, may be best just aiming for 4ghz with decent temps, then pushing for to much really.

But keep testing though, u may get those temps a lot lower with tweaking, just it takes time is all.
 
yea i hope i have some headroom as my vcore is set to 1.4 atm,just want a stable clock,(albeit with high temps !doh!) before i start reducing the volts.almost 1hr in still running without fault.

EDIT: done 1hr+ on prime,gonna try getting those volts+temps down now slowly but surely.
 
Last edited:
after a lil fiddling im managing to run 4.1 at decent temps,been running prime for 2hrs so far without problems,ima leave this running overnight and if all is good in the morning ill try to hit the magic 4.2.

41.jpg
 
You must log in or register to reply here.
Back
Top Bottom