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**Ivy Bridge Overclocking Guide** (with LN2 Guide at The End) - Page 115

post #1141 of 1508
Ok so I'm trying to OC but the only problem with following your guide, is that when I try to alter vcore loadline callibration to turbo ( or anything for that matter) it only lets me set it to standard or auto nothing else...? Why is it I can't set to turbo. Also it appears that I have the same bios as you do in the pics except I'm using an i5 and want to OC as high as I can without shortening the life of my board or CPU. It's a third gen i5 and is running at 3.4 right now on air cooling. Could you or someone else assist me with this please!
post #1142 of 1508
Quote:
Originally Posted by Etetherin View Post

Ok so I'm trying to OC but the only problem with following your guide, is that when I try to alter vcore loadline callibration to turbo ( or anything for that matter) it only lets me set it to standard or auto nothing else...? Why is it I can't set to turbo. Also it appears that I have the same bios as you do in the pics except I'm using an i5 and want to OC as high as I can without shortening the life of my board or CPU. It's a third gen i5 and is running at 3.4 right now on air cooling. Could you or someone else assist me with this please!

Please fill out rigbuilder and add your rig to your sig. Which bios version?
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post #1143 of 1508
Quote:
Originally Posted by 8bitG33k View Post

So vdroop can also be positive, as the voltage goes above what is set in the BIOS? I have vcore set to 1.240v, LLC set to Extreme and CPU-Z shows 1.260v.

Nope, vdroop will lower vcore at load, you are seeing the increase due to load line calibration compensation of vdroop. And it seems to be overshooting.
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post #1144 of 1508
Quick noob-ish question: why would a 3770k, even when I set fixed vcore in bios at 1.320v go to 1.344 at times (for 4.5GHz)? The same happened if I set vcore to 1.4v it goes up to 1.42 or even 1.440v (for 4.7GHz)... it doesn't always go there, only under stress. But my old 3570k didn't do this, if the voltage wasn't enough it would simply give a BSOD instead of upping the voltage on its own, even if I am on fixed vcore.
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post #1145 of 1508
Okay, I'm looking for a little help with my overclock.

All my rig details are in my sig below, but the short version - 3770k, Z77X-UD5H, (2)GTX 660Ti SC, 4x4gb Ripjaws Z 2133.

Quick story recap:

I had the rig stable at 4.5ghz, 1.28vcore. Came home one day, started the computer, left the room. Came back 15 minutes later, stuck on the Windows loading screen. Attempted a reboot, got a BSOD. Went into BIOS, found no CPU fan speed, 88c core temp. RMA'ed my H220, got new unit, installed. Set up same overclock - P95 crashes within 15-20 minutes.

I've been playing a bit more with vcore - was running 1.30 last night when I was at home - still get the same problem - P95 either crashes or system shuts down and does error recovery within 15-20 minutes. Temps are good - no more than 70c on P95. I've also backed off from Profile2 on XMP to Profile1. (They both seem to be 2133 speed, so not sure what the differences are between them). Also, both CPU-Z and Hardware Monitor show my vcore as more in the 1.25 range under load even though it's set to 1.30 in BIOS.

Other info:

BIOS F15q
System seems to be fine other than P95. I do get some dump to desktop or hang on area loading screen in Skyrim, but this could well be attributed to the 100+ mods I'm running. Plus CPU usage never goes above 40% or so on Skyrim and RAM usage is sub 30%. Temps stay in the mid to upper 50's playing that game. I've also played a bit of BF3 recently with no issues.)

Let me know if there's any more info that would be useful and any suggestions.

I may try to go all the way to 1.35 on the vcore. I'm guessing that running Memtest might be a good idea as well.
post #1146 of 1508
Quote:
Originally Posted by devilpriest View Post

Quick noob-ish question: why would a 3770k, even when I set fixed vcore in bios at 1.320v go to 1.344 at times (for 4.5GHz)? The same happened if I set vcore to 1.4v it goes up to 1.42 or even 1.440v (for 4.7GHz)... it doesn't always go there, only under stress. But my old 3570k didn't do this, if the voltage wasn't enough it would simply give a BSOD instead of upping the voltage on its own, even if I am on fixed vcore.

Only time I've seen that is setting the LLC to extreme and using offset. Under load this can cause the board to fluctuate above (and below) the desired target vcore. To compensate, typically setting the vid a littler higher and the llc lower (say turbo) and allowing the board to experience a little vdroop under load. However, you are setting your oc using fixed vcore so not sure whats going on. When I set my oc using fixed vcore and extreme llc I get exactly the desired vcore under load (or idle), no more, no less.

Maybe has something to do with what monitoring program you are using to monitor the vcore. Best to measure with a multimeter if suspect monitoring programs giving wonky readings.
Edited by barkeater - 3/25/13 at 1:59pm
post #1147 of 1508
Quote:
Originally Posted by devilpriest View Post

Quick noob-ish question: why would a 3770k, even when I set fixed vcore in bios at 1.320v go to 1.344 at times (for 4.5GHz)? The same happened if I set vcore to 1.4v it goes up to 1.42 or even 1.440v (for 4.7GHz)... it doesn't always go there, only under stress. But my old 3570k didn't do this, if the voltage wasn't enough it would simply give a BSOD instead of upping the voltage on its own, even if I am on fixed vcore.

It's actually quite common IF you have LLC set to max compensation of vdroop. It also can be quite varible between manufacturers and even within a manufacturer with a new bios. Vdroop is a good thing and i would advise to not defeat this engineering solution intel spent quite some time developing. Running LLC at max effect? Why?

Barkeater is right. If you want to poke around the voltage limits, get a DMM.
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post #1148 of 1508
Quote:
Originally Posted by SDBolts619 View Post

Okay, I'm looking for a little help with my overclock.

All my rig details are in my sig below, but the short version - 3770k, Z77X-UD5H, (2)GTX 660Ti SC, 4x4gb Ripjaws Z 2133.

Quick story recap:

I had the rig stable at 4.5ghz, 1.28vcore. Came home one day, started the computer, left the room. Came back 15 minutes later, stuck on the Windows loading screen. Attempted a reboot, got a BSOD. Went into BIOS, found no CPU fan speed, 88c core temp. RMA'ed my H220, got new unit, installed. Set up same overclock - P95 crashes within 15-20 minutes.

I've been playing a bit more with vcore - was running 1.30 last night when I was at home - still get the same problem - P95 either crashes or system shuts down and does error recovery within 15-20 minutes. Temps are good - no more than 70c on P95. I've also backed off from Profile2 on XMP to Profile1. (They both seem to be 2133 speed, so not sure what the differences are between them). Also, both CPU-Z and Hardware Monitor show my vcore as more in the 1.25 range under load even though it's set to 1.30 in BIOS.

Other info:

BIOS F15q
System seems to be fine other than P95. I do get some dump to desktop or hang on area loading screen in Skyrim, but this could well be attributed to the 100+ mods I'm running. Plus CPU usage never goes above 40% or so on Skyrim and RAM usage is sub 30%. Temps stay in the mid to upper 50's playing that game. I've also played a bit of BF3 recently with no issues.)

Let me know if there's any more info that would be useful and any suggestions.

I may try to go all the way to 1.35 on the vcore. I'm guessing that running Memtest might be a good idea as well.

What bsod code? Yes, absolutely do a couple of memtest86 hours. prolly best to clr cmos if boot guard triggered and redo the OC, or reload it from a save slot.

If you have had a bunch of hangs, CTDs or bsods over time and have not repaired windows, open a cmd prompt and type in: sfc /scannow. Let it run. If it reports anything but no corruption found, post back here.
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post #1149 of 1508
Quote:
Originally Posted by Jpmboy View Post

It's actually quite common IF you have LLC set to max compensation of vdroop. It also can be quite varible between manufacturers and even within a manufacturer with a new bios. Vdroop is a good thing and i would advise to not defeat this engineering solution intel spent quite some time developing. Running LLC at max effect? Why?

Barkeater is right. If you want to poke around the voltage limits, get a DMM.

bold added by me

b/c when you load up on the processor and are oc using a straight vcore you want your droop zero or your vcore will drop below your target and cause instability. vdroop is a good thing when using offset b/c you can run into problems with your idle getting unstable due to the vcore jumping around and dropping too low.
post #1150 of 1508
Quote:
Originally Posted by barkeater View Post

bold added by me

b/c when you load up on the processor and are oc using a straight vcore you want your droop zero or your vcore will drop below your target and cause instability. vdroop is a good thing when using offset b/c you can run into problems with your idle getting unstable due to the vcore jumping around and dropping too low.

Nah, droop and drop have been around much longer than speedstep or offset. Droop only comes on at load, and LLC reverses the load vs vcore lowering algorithm of droop, again only in effect at load. Defeating droop is not advisable especially when running 100% cpu load 24/7.

My offset oc with LLC at 50% has a rock stable idle.... Load vcore will float 20-40mV for 46 @1,328, same for 48. I can't get 50 using offset/turbo, only fixed, then LLC at 75%. I shoot for the lowest LLC compensation possible.
Edited by Jpmboy - 3/25/13 at 5:11pm
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Nvidia Tesla C-class 2 GTX Titan X Pascal (water cooled) GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 
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Plextor 256GB M6e M.2 2x Plextor SSD 256 Raid 0 (Win 7) Samsung NVMe 950 Pro M.2 Plextor 810 
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Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 Koolance 380i Laing DDC-1T (2) 
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Koolance EXC-800 Chiller Windows 10 x64  Windows 7 Pro Linux Mint 
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