Help get my q6600 past 3.15Ghz

vertica

vertica

vertica

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As per title i could do with some help getting my oc a bit further.

rig:

q6600 G0, xfx790i ultra mobo (latest bios p04),
2x2GB ddr3 ocz 1333 cas 7,
8800gtx's in sli
zalman 9700 tritium cpu cooler
coolermaster cosmos S
etc etc..

anyway VID for the 6600 is 1.325V which i know is quite high:(,
currently clocked to 3.15GHz
rated fsb = 1400mhz = 350mhz*9
this at 1.475V in bios - 1.440 in windows idle and 1.400V full load.
any less and prime gives rounding error on core 2.

i've never seen core temps above 58 on load so would like to push it abit further if i could.

i've left nb(spp)/sb(mcp)/fsb voltages on auto atm, which adjusts them to 1.35/1.5/1.4 respectively.
which is stable

anyway my problem is that if i even nudge the rated fsb to 1401mhz the system hangs on reboot pre-post,
and then i have to jump the bios and start again

thought it could be an fsb hole, but i've taken it up through 1466 (3.3GHz) right up to 1600 (3.6Ghz) but
it just wont post.

oh and the memory is being left at stock atm.

i'm fine with it running at 3.15 but you know how it is;)

suggestions welcome

cheers
 
I have the same VID as you for my Q6600 however mine was stable @ 3.2 with 1.3 vcore in bios. So As Ben M said try upping the N/B a bit (maybe even +2), and also lower your ram divider to eliminate any chance that it's the ram causing the error.
 
Probably wont apply to you as its a different MOBO (i have Asus P5KC). But i couldnt get over 3.2 on mine until i did the pencil MOD, as i had a really bad case of vdroop.

I could still only get to 3.4 though with my Q6600 with a VID of 1.325, so i was lucky and managed to swap it for one with a VID of 1.285 and straight away managed 3.79ghz. Think it will go higher but am waiting for some MX-2 paste to arrive. Anyway, basically my limited experienced told me that the VID was
stopping me from OCing with the 1.325 chip

Good luck with it
 
parxuk said:
Probably wont apply to you as its a different MOBO (i have Asus P5KC). But i couldnt get over 3.2 on mine until i did the pencil MOD, as i had a really bad case of vdroop.

I could still only get to 3.4 though with my Q6600 with a VID of 1.325, so i was lucky and managed to swap it for one with a VID of 1.285 and straight away managed 3.79ghz. Think it will go higher but am waiting for some MX-2 paste to arrive. Anyway, basically my limited experienced told me that the VID was
stopping me from OCing with the 1.325 chip

Good luck with it
Click to expand...

Pleased you finally got over 3.2Ghz ;)
 
Yeah thanks m8, i am begining to learn about this OC stuff and really appreciated your help a few weeks back. That pencil mod made a big difference and now with 1.45 vcore set in the bios, it never goes below 1.440 even under load, which i think made a big difference.

As i said though, it seems very chip dependant, and some are lucky and some aren't.
 
And some chips are strange. I can;t get my q6600 stable on the 9x multiplier past 3.2Ghz.

3.4, 3.6.3.8 all stable with the 8x multi

If I try even 3.3Ghz at 8x stable and change nothing voltage wise except the multi to 9 and drop the fsb to give 3.3Ghz it won;t even boot into windows :eek:

I;ve given up on the 9x multi with my cpu. However I am more than happy with 8 x 475 :D

So you might want to try the same and go for the 8x multi from there on. Don;t forget to drop your memory ration back down to suit.
 
My Q6600 also has a vid of 1.325V , i can get 3.6GHz 450 FSB and 8x Multi on my Rampage Formula motherboard.
Same chip on my P5N32E-SLI which is a 680I motherboard would only clock to 3.2GHz no matter what i tried.....

Just goes to show that the motherboard does matter when overclocking..
 
tried upping the nb voltage, no joy.
then got sidetracked by the dust bunnies lurking in my fan filters, a 200mm fan sucks in a lot of gunk in a month!!!

will try the 8x multi 2moz, as am rendering some video 2nite.

doesnt using a lower multi put more strain on the fsb? Or is this not really an issue?
 
just to reitterate, the oc goes form 100% stable, to absolutely nothing - no post, no error just a hang,
this by upping the fsb by 1mhz!!!
the board's newest bios allows you to take the fsb to 3000MHz!!! or so it says

so thats 1400 = 100% stable
1401+ = no post

very frustrating
 
I got that with my E6600. Running it at a lower multi and higher FSB gets me to 3.4 stable. And im happy with that! Its a limit of the board. Try running the 8x multi to get the same clock and then go from there.
 
Try 420x8

some board/chip combinations just don't do certain FSB's.

My StrkerII 790i did precisely the same thing. but dropping to an 8x multi and jumping to over 400MHz did the trick. Could still only get 3.4 out of it. 3.5 is happy enough on my new gigabyte board.
 
got a gap in the video work so decided to try the lower multi
still no joy, tried 1400 => 350*8 and was fine at 2.8Ghz
tried 351 (1404) and no post.

having done some more searching, found there seems to be a 'small':confused: fsb hole when usiong q6600's between 1400 and 1600!!!!!:eek:

attempting (foolishly?) to get round this i tried 2GHz at the 6x multi => 500*6 => 3Ghz
but still nowt

will try some more x8 2moz
but looking like i'm stuck at 1400mhz then, which ok i guess:rolleyes: lol
 
vertica said:
got a gap in the video work so decided to try the lower multi
still no joy, tried 1400 => 350*8 and was fine at 2.8Ghz
tried 351 (1404) and no post.

having done some more searching, found there seems to be a 'small':confused: fsb hole when usiong q6600's between 1400 and 1600!!!!!:eek:

attempting (foolishly?) to get round this i tried 2GHz at the 6x multi => 500*6 => 3Ghz
but still nowt

will try some more x8 2moz
but looking like i'm stuck at 1400mhz then, which ok i guess:rolleyes: lol
Click to expand...


Okay so your mobo has a big hole but why jump in with two feet? It is very, very rare to find a mobo capable of doing 500 fsb.

Tray 9 x 401 = 3.609Ghz or even 8 x 401 = 3.208 Ghz to get past the hole? If they don't work try 410. You might find it easier to try the 8x route as anything past 3.6Ghz is hard to get stable
 
Well its deffinately an fsb hole, anything between 1400-1600mhz (350-400) just doesnt boot. which is bizzare as the frequencey cut offs are so precise!
I've got it windows stable at 1604 / 401, on the 8x multi, but (even rasing the vcore to 1.55V) core 2 lasts less than half a second under prime95, even if its the only core loaded! i can run the other 3 cores full load at 60C, but not core 2.

EDIT: have also now tried higher fsb (boots at 1800mhz / 450) on the 7 multi, but core 2 always drops out above 3.15

I'm guessing that core is just a low yeild one hence the high vid so i'm sticking to 3.15GHz thanks for the suggestions tho
 
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