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E8600 EO 4.5ghz stable but 4.6ghz not, advice - Page 3

post #21 of 33
Quote:
Originally Posted by mizike View Post
Well they made it to freaking 6.7ghz on Liquid Nitro, and over 5ghz on air, so water has to be in 6s. And guys are easily hitting 10 times 450 with 1.3v core, so what the hell. I have the EO stepping, the vid is low, I should be able to go over 4.5ghz easily I have to think its my settings holding me back, or board, or PSU or something, just not sure what it is. 4.5 I am 100 percent stable, I do see the 6.7ghz is on 1.6 v core lol, so Im not trying to get there, but I have room as far as temps go with my little zerotherm, the zero has great ratings at full speed for cooling so its a pretty damn good cooler, and if its 30s idle and barely hitting 60 full load, then I got some room on temps, just need to know the right settings to push, or if somethings holding me back like the 550 watt PSU, or board or something.
Anyone hitting 5GHz on air with voltages that aren't crazy has a heck of a cherry picked chip. I don't even see 5GHz on water much. At that speed you're really pushing. 4.5-4.6GHz is what I normally see of bulk of the higher OC's on air. As someone esle said I think your expectations are a little high.

Anyway sounds like you've hit your limit on that chip. 4.5GHz is very nice and at that speed you should be sitting at nice performance on pretty much anything for a long while. Don't get too greedy I mean you can't complain much about a 1GHz+ OC.
post #22 of 33
Thread Starter 
YEah I guess I have lol, I can boot into 4.7, 4.8 and higher, just cant pass OCCT test, plus temps get in 70s. Yeah I guess I will do 4.5ghz and drop my vcore till it fails to find the lowest v core, what are some ideal voltages for NB, FSB term then with a lower vcore so I can get as cool as possible at 4.5ghz?
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post #23 of 33
With that FSB probably probably around 1.4v on the FSB termination and somehwere between 1.3-1.4v on the NB. When I run 465 FSB with an 8x multi on my quad I use between 1.3-1.4v on both. I can't remember the exact values though.
post #24 of 33
Guys the P5Q uses the P45 chipset which is made on a 65nm process...this means you really don't need much NB voltage at all. 1.4V is much too high, i don't think it's harmful in any way, but it's just unnecessary.

And Ricdeau 1.4 FSB termination is fine on a Q6700, but he is running a 45nm chip and they really don't need much at all. i am running 1.24V right now and 4.6GHz stable
    
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post #25 of 33
Thread Starter 
OK cause Yeah I was getting same info on NB and FSB on other overclocking forums for the E8600 that they had 1.4 no more then 1.45 when overclocking at 450fsb and higher so not sure whos right lol? I am lowering cpu core now to see when becomes unstable, get it stable then I will try gurusans vote to lower the NB and FSB term see if I can keep it stable.
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post #26 of 33
keep the GTL ref at Auto for the moment and try 1.26V termination and 1.26 or 1.28V northbridge
    
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post #27 of 33
Quote:
Originally Posted by mizike View Post
OK cause Yeah I was getting same info on NB and FSB on other overclocking forums for the E8600 that they had 1.4 no more then 1.45 when overclocking at 450fsb and higher so not sure whos right lol? I am lowering cpu core now to see when becomes unstable, get it stable then I will try gurusans vote to lower the NB and FSB term see if I can keep it stable.
Nice thread and keep up the nice OC !
I would definitely listen to the abundance of advice guru gave you.
Especially since he uses Asus p45 also , and p45 is a diff beast all together.
That in addition to the fact that throwing around the voltages and terminations like people have been is not going to help your cause, only kill hardware.

Either way nice chip ! and try the other suggested settings.
And try and limit your advice to people who run E8xxx series on p45 , other even experienced OC ers who have not used this combo may give you deadly advice.
Edited by D.J.S. - 12/23/08 at 7:33am
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post #28 of 33
Quote:
Originally Posted by mizike View Post
OK cause Yeah I was getting same info on NB and FSB on other overclocking forums for the E8600 that they had 1.4 no more then 1.45 when overclocking at 450fsb and higher so not sure whos right lol? I am lowering cpu core now to see when becomes unstable, get it stable then I will try gurusans vote to lower the NB and FSB term see if I can keep it stable.
Yeah, he'd know more than I do about what you might need for a 45nm. I don't really have much hand's on experience with them. A lot people will recommend over 1.4v in a hurry and you shouldn't need over 1.4v for much of anything that I've experienced.
post #29 of 33
Thread Starter 
Yeah I dropped the vcore and its unstable so I am going to assume I am like he said at my safe max for this chip, so now its sitting at 1.42vcore. But I dropped the NB and the FSB term down to 1.3 and 1.28 respectively and it looks stable. I will do a OCCT 2 hour later to test for sure but seems like those settings will work out ok for 4.5ghz. Sort of mad that I couldnt go higher, but 4.5ghz is pretty nice and thanks for all the advice, I will drop it to 1.26 and 1.28 if I pass OCCT and try again, then lower the vcore one more step down, would b nice to be stable at 1.41.
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post #30 of 33
Yeah, I noticed that if I increased my overclock past a 1.1GHz increase, I needed to greatly increase the voltage. I didn't like that, so I dropped it down to a 1.0GHz increase, and got it 100% stable 24/7 at 1.304v which I am much more comfortable with. It sounds like yours is probably the same way mine is, since you have a 1.2GHz increase there and need such a high voltage to get it stable. With a 45nm chip, I highly recommend lowering the OC just a bit so you can drop the voltage and keep it stable. These are more fragile than 65nm, which would shrug off 1.42v for 24/7 performance. But not a 45nm. Voltage becomes a little more important than temps, whereas it's the opposite with 65nm.
Edited by TwoCables - 12/24/08 at 11:52am
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