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tweaking my overclock i7-3770k

post #1 of 13
Thread Starter 
I spent all day putting my new CPU in (upgrade from i5 at 4.6Ghz) and started overclocking immediately. My target is 4.6, so I started there, and here is what has happened so far:

Originally, I could not get the thing stable at all (fail within a minute of P95). I eventually added enough voltage to get close to the 5 minute mark before a core failed. My temps are at around 85 at the highest with an offset of .025+

I pushed up my VTT one notch to 1.064 (I was getting x124 BSOD once in a while).....the curious thing is that I was getting nowhere until I hit the offset of .025+ and then I dropped PLL by one notch to 1.791 and P95 ran for 40 minutes, from being only stable for 5 minutes the run before. I only changed the PLL down to 1.791 and got 5x the run time before a worker failed.

My question is, what do I do next. I'm already too high on the temps, so I don't want to raise Vcore, but I'm not sure what else to do at this point. I can try to drop PLL again, but I'm not sure that will help. VTT can be bumped one up, but I'm not sure I should since I'm not sure exactly what it does either.

While running, VID = 1.2910 in CoreTemp and actual from Asrock tuning utility = 1.334

Idle voltages = 1.078-1.1 in Asrock utility
Idle VID = 1.3010-1.3060 in CoreTemp
CoreTemp does not show any underclocking like my i5 used to....minimum I see is about 3150 (used to see 1600 with my i5-2550k), but the speed generally jumps around the 3800 +/- 400Mhz

LLC is set to Level 1 on my AsRock p67 Extreme4 Gen3 board- I'm not sure what that means exactly, but the graphic aid shows a straight line across for the level I've chosen.

I'm going to reset and save this configuration to the BIOS and then bring the PLL down one more notch to see what the effect is. Does anyone have any advice?

Current @ idle
vCore = 1.068-1.1
DRAM = 1.410
VTT = 1.064
VCCSA = 0.925
PCH = 1.059
CPU PLL = 1.791

Offset = +0.025
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post #2 of 13
0x124 is usually low vcore error. Offset is not the best way to test stability. Leave offset for later, when you find your stable vcore at the desired cpu speed. Try 4.5Ghz, dial 1.2v and rerun. Also check temps to see how far you can push. I dont know asrock bios but set LLC to a level that in cpuz under load dont drop to much.
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post #3 of 13
Thread Starter 
I dropped it down to 4.5 just to see what I can get with the same voltage I'm at now. I got over an hour at 1.344 (offset +.030), but it's not stable so I had to take a shot at decreasing the overclock to see if I could at least get 4.5 before attempting to go higher.

If I get a good multi-hour run with P95 @4.5, then I'm going to try to decrease the PLL again to try to maximize the benefit. Once that happens, I may try for 4.6 again. I just don't think I got a chip that I could comfortably hit 4.6 with.

I am running a Noctua NH-D14 in a good cooling case, but temps still get into the mid-80s with my 1.344 voltage. I'm at my limit on temps, so I'm going to have to go with a lower voltage which means that I'll have to settle for 4.5 or below.
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post #4 of 13
Set everything back to default, put pll at 1.7v, put offset to +.005v, than change multiplier to 45, make sure llc is at 75%, change phase control to max and cpu frequency to 350, and finally turn off c3, c6 and all package c-staes only leave eist on and c1e, save and rebbot. Lemme know how that goes
post #5 of 13
Thread Starter 
Changed all settings that were available- I have the 2.10 BIOS that I needed for the Ivy CPU on this board.

Voltage at about 1.28 in AsRock Utility. Crashed in about 1 minute.

Set LLC back to Level 1 (100%) and voltage about 1.31......no crash after a few minutes
PLL @ 1.709, offset still at +.005 Temps under 80 across all cores
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post #6 of 13
try putting llc back to 75% and just up the offset to make up the difference its better than having spiking voltages with 100% LLC, other than what I suggested to tweak you pretty much did it all now it is all up to your silicone. Good luck hope you will be happy. I had to settle at 4.8 @1.35v for my 24/7 clock.
post #7 of 13
Thread Starter 
Quote:
Originally Posted by enigma7820 View Post

try putting llc back to 75% and just up the offset to make up the difference its better than having spiking voltages with 100% LLC, other than what I suggested to tweak you pretty much did it all now it is all up to your silicone. Good luck hope you will be happy. I had to settle at 4.8 @1.35v for my 24/7 clock.

yea- I did exactly that before I left for work. Once I get home, I just have a few things to try to stabilize it further- got an intel or windows lan error twice during my last OC Prime test

I have my onboard lan turned off and am using an intel PCI-e card

It follows logic that I should bump the PLL, but since it was my first test with a higher offset and llc set down to 75%, I am going to bump the offset to +.040 and see if it happens again

My temps still kiss 80 with an ambient of 70 so it is highly likely that I may have to reduce the multiplier again

Sucks hard

My crappy 3770k is worse than my crappy 2550k which capped at 4.6, almost defeats the purpose of an "upgrade" and definitely is a waste of money

I should have paid the extra 30 and gone with a Sandy i7
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post #8 of 13
I had a 2600k and don't regret going the ivy route but your ivy bridge with meet or exceed your old sandy. lets say your last sandy did 4.5 your ivy will outperform or match in performance at 4.2 so I would worry. Plus its has pci 3.0, overclocks usually with lower voltage and is better with power savings not to mention just newer tech. sell it and buy a new one to see if you get a better one or delid and get way better temps.
post #9 of 13
Thread Starter 
I hope so-

What temps are you limiting your CPU to? I plan on running this CPU in one PC or another over the next 3-5 years so it must survive my voltage and temps. I have a Q6600 @3.2 that I still run and I've only had to bump the voltage once since 2009.....I want to repeat that same experience with this one, provided I have an idea of its limits.

Thanks again for your help.
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post #10 of 13
Absolute safe is 80c max and 1.35v mine stays at 1.35 & 75c max but I delidded
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