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post #1101 of 6500
Quote:
Originally Posted by SavantStrike View Post

Any way to nail down which hardware? I've got a finicky raid card in this system too.
EDIT: I should probably add to further muddy the water, there are two columns. One is simply "Errors" which is at zero, and the other is "Operational" which does have errors. Furthermore, they appear to happen every time the system boots, but not in between, hence the large cluster when I was changing vcore offsets.
I did have a BSOD today, so I just said the heck with it and set the chip and IMC to take an extra .005v since that's as close to stock I can get without lowering the voltages. Even still though I get errors at start up, and start up does take a long freaking time. In Linux too. I feel like my boot loader may have gotten jacked some how, but I really don't want to have to do a reinstall, it's very time consuming with all of the files I have.
Double Edit:
Boy is my face red. You said Errors, not operational in your original post. Also, even under operational it appears there are 4 sources. I went into device manager and it appears I didn't install the intel INF update on this install. That may or may not have helped me. Elsewhere in the regular system logs I've been able to nail down the error as \device\raidport0. My raid card is fine, so this is most likely just a driver issue. Specifically, it appears that the error has to do with the card not relinquishing control of the PCIE bus, most likely due to a disk issue. My controller management panel says the drives are all green though, so I should be good. This particular error only happened once, but there is a good chance it's the same problem that the system reports every time it starts up, and why it takes so dang long.
If Errors is empty then your overclock is good. Some raid card doesn't work well on non-server computer. I read LSI card should work well though.

BTW, does anyone know any software that can read PCIe speed? I tried EVGA E-Leet Tuning Utility but it can't read PCIe speed on Asus X79 board.

EDIT:-
Anyone using CPU Strap 125 & offset voltage?
Edited by kizwan - 7/29/12 at 1:38am
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post #1102 of 6500
Today I overclocked to 4.625GHz using CPU Strap 125. With auto voltage, VCORE is between 1.400V & 1.408V. Too high for 4.6GHz in my opinion. I also tried offset voltage but I can't get it to work (except auto offset voltage). Long story short, I set manual VCORE to 1.35V but CPU-Z reported 1.376V. Memory is running at DDR3-1333.




Running Prime95 blend to get the highest VCORE the CPU get. Most of the time VCORE is 1.384V:-


Running IBT with Very High setting for 10 passes. VCORE is between 1.376V & 1.384V but most of the time is 1.376V:-



The high temperature is due to high ambient, 35C according to thermometer in my room. So, does offset voltage is not possible when using CPU Strap?

For my 4.5GHz overclock, I use these settings:-

I actually like it because it's quite stable after almost 2 month & I can use offset voltage 0.04 (VCORE between 1.36 - 1.37 when under load).
Edited by kizwan - 7/29/12 at 6:19am
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post #1103 of 6500
I run 4.75ghz 24/7 with 2000mhz on memory setting. It takes around 1.40-1.41 vcore to do so. Max temp folding at that or bench marking is 62* with a h100 but normally stays in the 55* range when gaming. I am not over concerned with the vcore as long as it is stable not hot. Idle temp is 29-31*C
post #1104 of 6500
Quote:
Originally Posted by kizwan View Post

Today I overclocked to 4.625GHz using CPU Strap 125. With auto voltage, VCORE is between 1.400V & 1.408V. Too high for 4.6GHz in my opinion. I also tried offset voltage but I can't get it to work (except auto offset voltage). Long story short, I set manual VCORE to 1.35V but CPU-Z reported 1.376V. Memory is running at DDR3-1333. Warning: Spoiler! (Click to show)

Running Prime95 blend to get the highest VCORE the CPU get. Most of the time VCORE is 1.384V:- Warning: Spoiler! (Click to show)
Running IBT with Very High setting for 10 passes. VCORE is between 1.376V & 1.384V but most of the time is 1.376V:- Warning: Spoiler! (Click to show)

The high temperature is due to high ambient, 35C according to thermometer in my room. So, does offset voltage is not possible when using CPU Strap?
For my 4.5GHz overclock, I use these settings:- Warning: Spoiler! (Click to show)
I actually like it because it's quite stable after almost 2 month & I can use offset voltage 0.04 (VCORE between 1.36 - 1.37 when under load).


I couldn't get my chip to boot with less than around 1.25v at 4.625 and a 125 strap, so the offset didn't work for me. I tried a 1.15v setting, but didn't try 1.2v setting. No idea if it was stable or not as I wasn't happy running at 1.2-1.25v all the time for power consumption reasons.


I see you are on an Asus board. Turbo mode allows you to specify additional turbo voltage, so it's like a hidden offset. I've thought a lot about setting my chip to a forced 1.2 or 1.25v with no offset, and then setting the turbo mode voltage in such a way that it bumps the core up to 1.3 or 1.35 under load. Since the multiplier at 4.6ghz is 37, and the base multiplier of the chip is 36, I think the turbo offset voltage would still come into play even at a 125mhz strap. From my experience, the chip hits turbo as soon as there is even the slightest load, as my chip either runs at 1.2ghz or 4.3ghz. This might let you get some modicum of power management at 4.6ghz, as you'd have a base voltage of say 1.25v and a load voltage of 1.35 ish.


You may also want to check and see what your turbo offset is set to btw. The offsets you are showing shouldn't be getting you up to 1.38V unless something else is at play, like turbo offset at auto. My offset at .005 only ever got me up to 1.28v with a .004 turbo offset (I couldn't set it to zero).
post #1105 of 6500
SavantStrike,

I will check for Turbo offset on next reboot. I experimented with offset VCORE again. Long story short, I set offset VCORE to +0.33. This result VCORE 1.352V.



Running Prime95 to see the max VCORE the CPU get (VCORE 1.352V - 1.360V):-


Running IBT "Very High" for 10 passes (VCORE 1.352V - 1.360V):-



I did tried +0.30. This result VCORE 1.32V. However, while running IBT, I got BSOD. tongue.gif First BSOD ever since I build this computer.

Several things I noticed when using CPU Strap 125:-
  • When idle, CPU no longer enter 1.2GHz (LFM mode) but now 1.5GHz
  • Even when using offset +0.33, the lowest VCORE is 1.352V when idle. Is this expected? Because on 4.5GHz overclock (x43, CPU Strap = Auto, BCLK = 105), VCORE can go as low as 1.0xxV when idle.
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post #1106 of 6500
i have also tried and failed using 125 strap and offset , it always gives me the error (code 79) and system not be able to boot mad.gif
post #1107 of 6500
Unlike when 4.5GHz using BCLK 105 & CPU Strap Auto which only need offset of +0.04 to get stable voltage, 4.625GHz using CPU Strap 125 require higher offset, around > +0.32. You can find nice offset for you using little experiment. For stable 4.625GHz overclock, VCORE usually around 1.35V to 1.38V. I think when overclock failed, your board also turn off & on after several seconds, you will presented with failed overclock message, and you will need to press F1 to enter UEFI again. This time check what VCORE you see next to "CPU VCORE Voltage" option. Wrote it down. Then calculate the difference between that & our target VCORE (let say 1.36V). The difference is the offset you need to set.

For example, after failed overclock & when re-entering UEFI, "CPU VCORE Voltage" is 1.064. Target is 1.36V. The difference: 1.36V - 1.064V = 0.296. So, the correct offset is 0.295 (it only allow increment by 0.005).
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post #1108 of 6500
IIRC offset won't work when using the BLCK to overclock. only can use offset when BLCK is at 100. thinking.gif

The main reason I really want to pull the trigger on a 3930k so I can get a fully unlocked multi.
Edited by BackwoodsNC - 7/29/12 at 5:03pm
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post #1109 of 6500
Quote:
Originally Posted by BackwoodsNC View Post

IIRC offset won't work when using the STRAP to overclock. only can use offset when STRAP is at 100. thinking.gif
The main reason I really want to pull the trigger on a 3930k so I can get a fully unlocked multi.
* I changed BCLK to STRAP because I think you means STRAP. I can use offset with BCLK 105.

In a way, offset does work with strap but not like when overclock only using multiplier. The VCORE range only between 1.352V & 1.360V, including when idle. Using only the multiplier, VCORE will go down to low 1.0xxV whenn idle. There must be good reason why VCORE didn't go down when using STRAP + OFFSET because even when using auto/default VCORE, it doesn't go down either, the lowest is 1.400V. Basically when using STRAP, either using auto or manual or offset VCORE, all three behave the same.

I think I much prefer overclocking only using multiplier & if I want the higher frequency, I just increased BCLK to 105. You can safely increased BCLK by -/+3 or 5 or 7 but I won't go near 107. With multiplier x43 & BCLK 105 (CPU Strap = Auto), I can get 4.515GHz stable with offset +0.04 (maybe I can go lower since with 4.625GHz, I can get VCORE 1.352V). Conclusion, I do agree you upgrade to 3930K. I want too but maybe in a couple of months. Actually it's in my upgrade plan (firstly custom WC, secondly GPU or 3930K).
Edited by kizwan - 7/29/12 at 8:46pm
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post #1110 of 6500
Hey everyone, great thread.. lots of useful information.

I recently upgraded to a i7-3820 from a i7-920 oc'd to 3.6, and it really is a nice cpu... at stock speeds everything is just so much smoother, however I was not really happy looking at the cpu speed and seeing it the same as my old cpu at 3.6ghz, and so my new overclocking adventure began.

I tried various settings to overclock, my aim was 4.3/4.5ghz for a 24/7 setup, pretty much everything I had tried resulted in a bsod STOP: 0x00000101 error during running prime95 within the first 2 minutes, most of the time as soon as the test started.

At first I just used the 100x43 setting and set the vcore to manual 1.240, set my ram voltage to 1.640 and 1600mhz, everything seemed great, did some quick prime tests only for a couple mins, left the pc on overnight re-downloading my steam games due to an overdue format before overclocking..... when I woke up the downloads were done, so I closed steam and decided to run prime95 again, within a few seconds another bsod.

After more tinkering eventually I found a setup that so far is working better than I had hoped for.

4.32ghz
120x36
I upped the vcore to 1.3, and ram voltage to 1.645

first I had tried 120x38 for 4.5, however it gave a bsod after a few seconds in prime95, since I did not want to increase the vcore anymore due to heat I knocked back the multi to 36.

I'm yet to give it a decent test, will leave it on overnight and see what happens this time around, however so far... I'm very happy with it.



also this time, both the bios post and windows7 system info displays my overclock correctly (i7-3820 CPU @ 3.60GHz 4.32 GHz)

at other times it would be incorrect, or just show stock, however this time its dead on... I think its got something to do with your BCLK and MULTI, windows only sees certain combos?

anyway this post has gone on way longer than I intended, cheers everyone for this great thread.
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