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post #341 of 560
Quote:
Originally Posted by Ghostleader View Post
The CPU Clock Skew may yield better stability with high bclk, 200+.
What magnitude would you suggest?
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post #342 of 560
Quote:
Originally Posted by R00ST3R View Post
Ya know, I'm still using A70. I'll get the A71 BIOS revision installed today, and have a go with it this evening. Good call, wasn't even aware a new BIOS was out for it. Thank's .
You´re welcome , looking forward to what you have to say about it.




Quote:
Originally Posted by ehume View Post
What magnitude would you suggest?
It depends on which brand, board or cpu one run but if one got the right combination I would say it can do up to around +5 bclk.


It can also contribute to a slightly lower vcore at the same cpu frequency.

For example, to get consistent time and GFlops (in my eyes, a more stable OC) between runs with LinX at 200 Bclk I use a delay of 100ps for CPU Clock Skew and normal for PCH Clock Skew with my MIIIF, if I run them both on auto I need to increase vcore by 0,0125 - 0,025.
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post #343 of 560
Finally got a stable 4GHz OC:



HT and all cores enabled.

Sign me up.
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post #344 of 560
Quote:
Originally Posted by Ghostleader View Post
You´re welcome , looking forward to what you have to say about it.
I'm not having any luck with the CPU skew settings, and being able to lower my vCore for 4.4Ghz runs. I'm not entirely sure of a solid testing methodology concerning CPU skew settings, could use a little insight into the proper way of testing if any is available.

There are also some new Turbo Boost options added with the A71 BIOS, now my CPU won't downclock according to load as it did before.

I just seen they released a new BIOS, A72 to be exact. Here is the description:
Quote:
BIOS 72 Updates:
Now CPU multiplier can be adjusted with Turbo offset
Perhaps it will solve it.
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post #345 of 560
Dayumn ehume very nice, pretty high voltage though.

What temps?
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post #346 of 560
I've had this 875k for about a month. Was running some crap ram with it that caused my required QCI volts to be higher than I liked (over 1.35v). I'm now running some good Corsair XMS3 ram and getting 4GHz stable at 190x21.

CPU VCORE @ 1.36v
QPI/VTT @ 1.34v
RAM @ 1.65 (factory voltage) running at 1520MHz.

Next step is to get some DDR16000 (2000MHz) and run that as close to 2000MHz as I can get it stable.

Do you need more info from me? I've since run LinX 50 times with memory size of 3000 and it was stable as well.

Note the max tempts reached in the bottom right corner of this pic. I have RealTemp set to show there and tell me highest temps reached. The green number is for my graphics cards. I don't know why there is such a huge difference in gflops between 1 machine running an 875k @4GHz and another. It seems like I should be getting higher numbers there, especially with my high bclock.

Ambient temps around 73f (23c). I'd like to reach 4.2GHz, but CPU temps are a problem running an H50 push/pull with 110CFM fans. Temps cause it to be unstable running LinX at anything over 4.1GHz.

Ransom

Edited by Ransom - 9/30/10 at 7:53am
    
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post #347 of 560
Thread Starter 
Added members to the list.

@ehume: Very nice voltage for 4ghz. Does the powering on voltage have something to do with your low VTT voltage? I need more than that for 3.7ghz ;(.
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post #348 of 560
I have no idea why I can run with such a low Vtt, unless Gigabyte boards have some kind of virtue. After all, a BCLK with Vtt on Auto is a little amazing, no?

I have discovered software to correct the faults of my motherboard. It is Real Temp GT beta. If you right-click the tray icon, you can select "Turbo Boost Limits" and actually select limits. The window looks like this:



I have my BCLK set to 134MHz. Vcore = Auto, Vtt = 1.19v
Vdimm set to 1.62v, PCH = 1.12v PLL = 1.88v
LLC, Turbo Boost, HT, C1E, C-states and EIST all enabled.

At idle, Tmonitor64 thinks it is going at 9x, Real Temp GT thinks the multi is 18.5x and CPU-Z thinks it is 30x. Note that the voltages in ET6 and CPU-Z are below 1v, more in line with a multi of 9x than anything else:



Now, with LinX running I get this:



All the software agrees that it is running at 30x with a Vcore of 1.312v.

So there you have it: I get the functionality of an Asus board with a Gigabyte board using unclewebb's miraculous software. Main thread is here.
Edited by ehume - 9/30/10 at 1:24pm
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post #349 of 560
Seems I jumped a little too soon. Real Temp 3.60 is now available.

I downloaded it, ran it and made the changes unclewebb suggested here. Much more satisfactory results:



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post #350 of 560
Just messing around a bit, failed to get a SS, but was able to submit it at least:
http://valid.canardpc.com/show_oc.php?id=1414204

Gonna shoot for a full 4.7Ghz with screenie after my proc rests for a spat. May go ahead and throw 1.6v at it and just see what it can do.
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