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post #11 of 25
xd 1771 is the resident memory guru here (that IS a compliment) he knows more than I do. I think I might relax the timing a bit and than continue testing. Try it at stock, than after your new OC is stabilized go back and re-tighten.

If you take a quick memory benchmark with Maxxmem2 or Everest you can see the difference with what you have verses the next multi for the HT. Not that big of difference.

The max safe CPU/NB Voltage is 1.45v, some will say higher, other may say lower. Myself I've seen some at 1.5-1.55v, but I have no problem staying near max of 1.4v with what I've had so far.

Try running prime95 as you start to make ground. 12-24 hrs is what most here consider stable.
 
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post #12 of 25
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
xd 1771 is the resident memory guru here (that IS a compliment) he knows more than I do. I think I might relax the timing a bit and than continue testing. Try it at stock, than after your new OC is stabilized go back and re-tighten.
My memory is currently at:

Memory: 1640 (9-9-9-24-33-1T)

Which is on "auto." I haven't done any adjusting yet. Should I relax those timings?

Quote:
If you take a quick memory benchmark with Maxxmem2 or Everest you can see the difference with what you have verses the next multi for the HT. Not that big of difference.
Yeah I just did it to see if I couldn't get the NB freq above 2400 (lower CPU clock in order to raise NB multi). I am not sure what my bottleneck there is. I have my CPU Vcore about as high as I want to get it and my CPU-NB voltage is at 1.325v. Should I raise it higher or is my memory itself holding me back (timings or voltage)?
Quote:
The max safe CPU/NB Voltage is 1.45v, some will say higher, other may say lower. Myself I've seen some at 1.5-1.55v, but I have no problem staying near max of 1.4v with what I've had so far.
OK, I guess I could try 1.35v

Quote:
Try running prime95 as you start to make ground. 12-24 hrs is what most here consider stable.
I've been running Orthos (which uses primes) and I passed a 20 minute test on both the CPU stress and RAM stress tests. It's stable so far.. I would just like to get my NB freq higher than 2400.
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post #13 of 25
I wouldn't be afraid to raise the cpu/nb voltage a bit. Give her heck man.

I can't say for sure on this one, but I do remember reading that 1600MHz ram maxs out at something like a 270MHz Ref Clock. It may be just your mobo/ram limiting you here. I haven't gotten my CHIV to much above 270 either so maybe I'm not the one to answer this one. But I can say this, I get much better results with a 250 x 16 and NB@3000MHz than with 260 x 15.5 and NB@2869MHz.
 
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post #14 of 25
Ah, the 1600 CL9 NQ. They overclock fair as well according to another member I've been talking to. Note that you may need an even higher tRCD on those compared to the Ripjaws, due to the binning (i.e. you have to run 7-9-7 instead of 7-8-7). Some of the NQ kits (though it was the 1333 CL9 kit that did this) responded rather violently to a kick in the DRAM voltage (i.e. no added stability). You'll have to see what works for you. Increasing the CPU-NB may help, the CPU-NB is the integrated memory controller on the CPU and as such increasing it may change the CPU tempratures just a slight bit.

Maxxmem and EVEREST are good memory benchmarks. SuperPi 32M and HCIMemtest are good for testing memory stability within the OS. Memtest is good for a check at the end to make sure you didn't wreck anything, though it should not be used to check OS stability because the results often differ from what OS stability tests have to say.
post #15 of 25
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
Ah, the 1600 CL9 NQ. They overclock fair as well according to another member I've been talking to. Note that you may need an even higher tRCD on those compared to the Ripjaws, due to the binning (i.e. you have to run 7-9-7 instead of 7-8-7). Some of the NQ kits (though it was the 1333 CL9 kit that did this) responded rather violently to a kick in the DRAM voltage (i.e. no added stability). You'll have to see what works for you. Increasing the CPU-NB may help, the CPU-NB is the integrated memory controller on the CPU and as such increasing it may change the CPU tempratures just a slight bit.

Maxxmem and EVEREST are good memory benchmarks. SuperPi 32M and HCIMemtest are good for testing memory stability within the OS. Memtest is good for a check at the end to make sure you didn't wreck anything, though it should not be used to check OS stability because the results often differ from what OS stability tests have to say.
Thanks for the insight. Right now I am trying to isolate the CPU-NB and get it clocked as high as possible. I am at 2500Mhz right now. I am having to up the voltage .025v for every 100Mhz or so. I guess I will have to be satisfied with 2600-2700Mhz as my voltage is getting up there already.

EDIT: I have my CPU-NB at 2600 Mhz and voltage at 1.35v. It is failing Prime tests at this voltage. Should I go higher with the juice? Do I even need a 2600Mhz NB?

Also, would increasing memory voltage help with this NB overclocking? I have it at 1.6v already.
Edited by thiussat - 1/18/11 at 4:08pm
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post #16 of 25
The scaling seems quite fair, you'll probably reach a point where the voltage ups get bigger though. Go with whatever works best, and make sure to run benchmarking apps such as MaxxMem. You might reach a point where upping the NB clock doesn't give any good increases anymore (unless you start lowering the memory timings).
post #17 of 25
Thread Starter 
OK after tinkering all day yesterday, the best I have been able to do is:

Clocks:

CPU: 3.6GHz (240x15) -- 1.45v -- (38c under load)
NB: 2400 @ 1.375v
RAM: 1600 (9-9-9) @ 1.575v

I can get it to boot at 3.7Ghz (247x15) but it fails Prime95 after a few seconds. That is with the NB being as low as 2100. Something is holding me back and I don't know what. I am thinking NB, but I really don't want to go over 1.375v on the CPU-NB. Or it could be that my CPU needs more juice, but I am reluctant to go over 1.45v.

Any ideas? Or should I be happy with 3.6Ghz? (The 3.6 is stable only preliminarily on Prime95. I am about to let it run all day while I am gone and hope it is still running when I return).
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post #18 of 25
When prime fails at this point is it BSOD? Or does it have a worker or two that stop working?

BSOD = more vcore,

workers has stopped = usually more cpu/nb or ram voltage

this isn't set in stone, just usually what I find to help stabilize.
 
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post #19 of 25
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
When prime fails at this point is it BSOD? Or does it have a worker or two that stop working?
Usually BSOD.

I ran a Prime95 Blend test today while I was gone, and when I came back I noticed my PC had rebooted. I checked the Prime95 logs and it seems to have failed right about the 3 hour mark. I guess I could add more vcore, but 1.45v for a mere 600MHz seems high already. I noticed other people have OC'ed this CPU to 3.6GHz without any vcore increase.

One thing I'm wondering about is my PSU. It only has one 4pin 12v connector but this mobo comes with 2. I only have one hooked in. Will this be a factor?
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post #20 of 25
You should be fine with just one connector on a x2.

Remember everybody's chip IS different and will have it's own needs. Just because a few others may have better results shouldn't bother you at this point. After all you're still learning and may learn how to improve your OC as you learn more. Don't be discouraged man!!! It takes time to learn your chip, and the mobo. You'll see what I mean as time goes by.

You may also find that just a slight increase in Vcore will do the trick. Try increasing by only a bump at a time at this point and keep track of how much further into prime each change makes. If after a few changes your not seeing any improvement, than back vcore back down and try raising the cpu/nb voltage the same way (small changes, and keep note as to if it makes a difference). Keeping track with notes can, and will help.

My PHII x2 555 BE needed 1.525-1.55v vcore to run just above 4.0GHz on a M4A785-M (Asus budget board) and even on the CHIV Formula it took 1.475v, so don't think your way over what most need to run.
Edited by The Sandman - 1/19/11 at 6:50pm
 
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