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**Ivy Bridge Overclocking Guide** (with LN2 Guide at The End) - Page 74

post #731 of 1508
Quote:
Originally Posted by alex-tpc View Post

I've tried offset at 5Ghz but needed to disable C3 and C6 which defeats the purpose of setting offset voltages.

Afaik you only need C1E enabled for offset to work. You can leave C3/C6/Speedstep disabled and still see voltage drop down when idling at 16x multiplier.
post #732 of 1508
Hello.
Im new to overclocking and i've been spending the past days reading about it.
There is a couple things im wondering about and that im not sure of yet, so i would like to get an understanding over that before starting.
So as i understand it i should be able to reach around 4,2 with the stock voltage, but after that a volt increase is required.
Does that mean that the auto voltage only goes to a certain point or am i completely wrong there?

Then there is Turbo boost.
As i understand it, it boost if only one core is in use to 3,8 or two cores to 3,7 etc.
So if i raise the multiplier to 42 for an example, does turbo boost gets added ontop of that or does it get disabled using the multiplier?

If im using 4,2 and turbo is disabled, i take it if one core is working they all startup? I know that on manual voltage they are at 4,2 nonstop but im not sure about how it works with auto voltage on that one.

I've been reading Sins guide several times and on the net but i just can't get into my head what to do about that turbo boost.
I would use offset if i wanted power savings feature on but should the turbo be clocked instead of the multiplier then?

Back to offset, to calculate what offset i need i take it i would use the vcore under load minus vid and not the bios vcore?

I would be very grateful if someone could shed some light on my questions.
post #733 of 1508
Okay, so I've gotten pretty stable at 4.5 Ghz, but between 1-3 hours of p95 blend , my second core errors out as hardware failure. This is also my hottest running core, it reached 88c in real temp.

Current settings on my UD5H with a 3570k:

CPU Ratio: 45
Vcore: 1.24 volts
PLL: 1.600 Volts
Turbo Power Limit: 300 Volts
Core Current Limit: 200 Amps
LLC: Turbo

I'm not sure exactly where to go from here, I get the same results at 1.25 and 1.26 volts, temps are within 2 degrees. Any help on how to get this stable would be wonderful. I've not messed with power saving features, and I'd prefer to leave them active if possible, no need to run this at 4.5 constantly.
post #734 of 1508

3770k Overclocking in progress need consultation

Hi all!

===========================
Gigabyte Z77X-UD3H - Bios: F12j
i7 3770k Batch L224C379
Corsair Vengeance 8GB DD3 1600C8
MSI GTX580
Corsair hydro H100
HAF 922
PSU 850W Coolermaster
==========================

Read the guides and trying to overclock to 4.5-4.6

What i have done in BIOS:

-Load optimized Defaults
-Disable integrated graphics
-Vcore LLC -> Turbo
-Disabled C1 EIST e.t.c
-Turbo OFF
-Multi = 45
-BCLK = 100

All other at optimized defaults values.

And i am trying for 4.5

Up to vcore = 1.29 Prime95 stops with error in 6 minutes.

With Vcore= 1.30 (idle 39C - Load ~76) it seems that prime95 is running well for the past 45 minutes and i will try to leave it there until morning to see if it gets through.

Isn't it a little high 1.30 for 4.5?

Should i take it and stop there? can i do anything to lower the vcore? (except disabling H/T).

Thanks
Edited by earthdog - 8/21/12 at 1:22pm
post #735 of 1508
Quote:
Originally Posted by earthdog View Post

Read the guides and trying to overclock to 4.5-4.6
What i have done in BIOS:
-Load optimized Defaults
-Disable integrated graphics
-Vcore LLC -> Turbo
-Disabled C1 EIST e.t.c
-Turbo OFF
-Multi = 45
-BCLK = 100
All other at optimized defaults values.
And i am trying for 4.5
Up to vcore = 1.29 Prime95 stops with error in 6 minutes.
With Vcore= 1.30 (idle 39C - Load ~76) it seems that prime95 is running well for the past 45 minutes and i will try to leave it there until morning to see if it gets through.
Isn't it a little high 1.30 for 4.5?
Should i take it and stop there? can i do anything to lower the vcore? (except disabling H/T).
Thanks

I find it interesting that you're having those issues. With my settings in the post above yours I was able to get my 3570k 4.5 stable through 3 hours of P95. I know there are voltage differences between the two chips, but the other settings should be equal.

One thing I noticed is that you didn't increase your Core Current Limit, it was one of the first settings I changed, along with the Turbo Power Limit, as these were about the only static numbers in Sins guide. While I increased my Multi, I didn't disable turbo or any of the power save features, including C1. So I guess my only advice to you is increase the Core Current Limit, and Perhaps the Turbo Power Limit...not sure if it matters with Turbo disabled.
post #736 of 1508
Quote:
Originally Posted by Skullwipe View Post

I find it interesting that you're having those issues. With my settings in the post above yours I was able to get my 3570k 4.5 stable through 3 hours of P95. I know there are voltage differences between the two chips, but the other settings should be equal.
One thing I noticed is that you didn't increase your Core Current Limit, it was one of the first settings I changed, along with the Turbo Power Limit, as these were about the only static numbers in Sins guide. While I increased my Multi, I didn't disable turbo or any of the power save features, including C1. So I guess my only advice to you is increase the Core Current Limit, and Perhaps the Turbo Power Limit...not sure if it matters with Turbo disabled.

With what voltage you have your 4.5?

Also Core current limit increase is needed when you keep the power saving features and have turbo enabled. I am not having turbo as i have a fixed ratio with turbo off....
post #737 of 1508
I can get 4.5 Ghz stable for 3 hours of P95 1.25 volts, but I always get a 0x00000124 between 3-4 hours, which means more voltage is needed. Sadly I'm hitting 90c at that voltage level, so I'm not inclined to take it any higher. I've had no issues while gaming at this level and my temps top out around 75c, but in the end I backed it down to 4GHz at 1.115 volts, I've done P95 blend for 9 hours on these settings.
post #738 of 1508
Quote:
Originally Posted by Skullwipe View Post

I can get 4.5 Ghz stable for 3 hours of P95 1.25 volts, but I always get a 0x00000124 between 3-4 hours, which means more voltage is needed. Sadly I'm hitting 90c at that voltage level, so I'm not inclined to take it any higher. I've had no issues while gaming at this level and my temps top out around 75c, but in the end I backed it down to 4GHz at 1.115 volts, I've done P95 blend for 9 hours on these settings.

mm i see, so 1.296v for my stable 4.5 seems legit.....

I am hitting ~86 tops at that...

I'd better look into a better TIM and FANs for my H100 take it to 4.6 with ~1.38
post #739 of 1508
Quote:
Originally Posted by earthdog View Post

mm i see, so 1.296v for my stable 4.5 seems legit.....
I am hitting ~86 tops at that...
I'd better look into a better TIM and FANs for my H100 take it to 4.6 with ~1.38

Mayonnaise seems to give alright results! But if the extra 2c is worth the shipping cost you can never go wrong with AS5, it's also less likely to degrade over time, or make you hungry for a sammich.

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490/5

As for the fans, there are a lot of places to find reviews. I don't know about you, but like big charts...so here's a nice one. Keep in mind it's 2 years old, but it's the best I can find related directly to radiator performance. Martin has some nice stuff as well: http://martinsliquidlab.org/category/fans/



From: http://www.xtremesystems.org/forums/showthread.php?261778-120mm-Fan-Testing-on-an-MCR120-Radiator-Round-6
Edited by Skullwipe - 8/22/12 at 12:25am
post #740 of 1508
Quote:
Originally Posted by Skullwipe View Post

Okay, so I've gotten pretty stable at 4.5 Ghz, but between 1-3 hours of p95 blend , my second core errors out as hardware failure. This is also my hottest running core, it reached 88c in real temp.
Current settings on my UD5H with a 3570k:
CPU Ratio: 45
Vcore: 1.24 volts
PLL: 1.600 Volts
Turbo Power Limit: 300 Volts
Core Current Limit: 200 Amps
LLC: Turbo
I'm not sure exactly where to go from here, I get the same results at 1.25 and 1.26 volts, temps are within 2 degrees. Any help on how to get this stable would be wonderful. I've not messed with power saving features, and I'd prefer to leave them active if possible, no need to run this at 4.5 constantly.

My suggestion would be to turn off the power savings features at least until you have found your max desired OC settings. Then you can use that information to set up a power savings setup using offset.
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