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Please advise 1st OC 3.0 Northwood system - Page 2

post #11 of 26
yup, big typhoon would definately keep it cool! However, I am quite satisfied with my Zalman.

Just get aftermarket.. the difference is more than worth the expense, and the installation should not be too hard.
    
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post #12 of 26
Thread Starter 
I thank everyone for the input on the cooler--it is certainly something I'm considering. I had just wanted to see what I could do stock first. Also, as you all know there are a ton of coolers out there. I'll have to do some research to figure out which to get. I don't mind spending the $$ but I still have some things to try (like lowering vcore). In my earlier attempts I was at about 41c idle so we'll see what happens tonight.

Great comments, thanks. Please if there are other suggestions/comments I would love to hear them.
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post #13 of 26
Thread Starter 
Here's something I'd like you guys to look at. It seems that conventional wisdom around here says 55c is max for the Northwood. Maybe these guys are on crack, but check out this article and let me know what you think.

http://www.digit-life.com/articles2/p4-throttling/
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post #14 of 26
This test shows that the Northwood they have started throttling at 74C, resulting in a massive drop of performance. You don't want to run so hot, since such high temps drastically diminish the lifespan of your CPU! Funny though that Intel also mentions a thermal spec of 70C on their website...

As far I know the thermal spec used by Intel is the max temp on which the CPU can run without a performance drop. but that does not mean it is the optimal temp! It's simple: the cooler, the better... If you plan on running this CPU for a while longer, make sure the temps stay below 55C load!

Good luck
    
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post #15 of 26
Yea I agree IMO it's safe to run a Northwood at relatively high voltages as long as your load temps stay below 55C. I'd really look into the cooling issue cuz you stated earlier that you were idling at 49C and that's really high for idle temp.
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post #16 of 26
There is a difference of 55C on a non-overclocked CPU and 55C on a heavily overclocked CPU. If you take into account transitory and electrostatic migration levels on the 55C non overclocked CPU and on a heavily overclocked CPU you would see what I mean. The difference is marked and is one of the reasons why so many overclockers wish to stay much lower than the Processor Stock Thermal SPec rating.

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post #17 of 26
First off I highly advise not using the software with the board to oc it. Its not very reliable and doing it yourself through bios is much easier to fine tune it. Its your memory timings thats holding back your oc. Set your divider to 1:1 and as you oc up you are going to need to loosen the timings to get it to stabilize. 1.6 is way north of what that chip needs at that oc. The reason why is probably using the oc software. Can we get some more info as to what your timings are set at. If you need any help just post back.
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post #18 of 26
Quote:
Originally Posted by YeaBaby
Yea I agree IMO it's safe to run a Northwood at relatively high voltages as long as your load temps stay below 55C. I'd really look into the cooling issue cuz you stated earlier that you were idling at 49C and that's really high for idle temp.
Hello,

I also have a northwood as you can see from my Sig.
Temperatures should not go more than 55*C under load in my opinion as well.
With my overclocked rig i get system temps of 25*C with CPU idle @27*C and 48*C under load.

As for voltages i would highly recommend keeping them below the 1.7v threshold. I get my current overclock with only 1.625v for comparision. There has been many cases of people saying "why has my chip died it was only at 55*C" then you realise that they have been running 1.75v + so temps are not the critical factor as such, voltage is the killer. (SNDS)

I know each chip does vary greatly but def get an after market cooler if you are serious about overclocking, your pc will def thank you for it

Hope that helps
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post #19 of 26
Thread Starter 
Alright, here is my update post. I spent several hours this morning before going in to work experimenting. One of the things I did was to clean the caked dust off of my heat sink. Another was to put the cover back on my case for airflow (duh). This yielded much better idle temps of 36c @ 3.6ghz+. I have not seen load temps go higher than 51c in my testing so far. So, for right now I'm cooling it on the cooling issue. I may get to the point where temp is a concern if I ever get a really good OC, but I have other obstacles to confront first.

I am trying to keep my RAM at 1:1 at this point, and I'll probably be able to do it at about 3.5Ghz Unfortunately I was a little bold before I went to work and set my external clock at 234, and I probably should have put it at 233. While @work, I can VPN into the OS, but not the BIOS to continue experimenting. The system seems stable until I run prime95 and I get a fatal error (within p95, not XP) I am guessing that if I go down one or two clicks I should get stable 1:1.

My goal is to hit 250 external clock, but I don't know if that's possible with my CPU (which I have noticed is Northwood D1). So far, with RAM at d/266 I can get to about 246ec and still boot into OS (but no stability). My idle temp is 36c at that point, and my voltage is either 1.58 or 1.6 (it doesn't seem to matter which--neither are stable.) So maybe that is the physical limitation of my CPU? Please offer opinions on this point.

I also have noticed that I cannot put more that 1.6v to my chip. Any more and the PC won't even post. I have to reboot several times before I can get into the BIOS to make changes. I have pulled both of my 10K RPM SCSI drives to address PSU issues, but still can't get more than 1.6v. I do have a GeForce 7800 card in there sucking power, but if the PSU needs to be replaced I'm just going to stop where I am (just bought the freaking thing a couple of months ago.)

I followed some of the advice given in Ropey's excellent reply to Xeoc's "OCing p4 3ghz Northy" thread except for the part about the memory. I can't get MAM to work, and never have been able to. Also, I don't understand the DRAM idle and refresh settings. I currently have 1 512 stick of Corsair CMX512-3200c2, and had planned on purchasing a second matched stick. Now, I'm considering selling that chip and getting DDR500 instead. Dunno.

So, at this point, here are my conclusions (of which I'm far from certain): Either my PSU or my CPU are limiting me at about 3.6--much faster and I'm unstable. I'm completely unable to boot into anything faster than 3690Mhz. And my memory seems to be unable to clock higher than 233Mhz (DDR466). Cooling does not seem to be an issue at this point.

By the way, when I try to go higher than 246ec, I get STOP: 0x0000007F, which if you look at MS KbID=137539 specifically states is an overclocking error. My suspicion is that I need more voltage to overcome this, but that my PSU can't provide. Please offer opinions on whether more voltage would overcome this STOP error.

<whew> Got all that? Thanks for all of the help, everyone. I will continue to post.
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post #20 of 26
Thread Starter 
By the way, to address a couple of comments, all of my OC is occuring in the ASUS P4P800 (deluxe) BIOS. Not OS.
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