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Ivy Bridge Overclocking Guide ► Asus Motherboards - Page 349

post #3481 of 7041
Quote:
Originally Posted by nature1ders View Post

I don't know where you guys are getting your numbers but for me 3770k @ 4.5 was stable with 1.170 but after testing it 12 hours twice it failed at 10 hours so I increased it to 1.180 but Prime complained it was unable to identify the cores bla so I'm at 1.190 now.

How you get 1.300 is beyond me............ unless this BIOS is lying to me idk.

But let me tell ya the temps with the Hyper Evo 212 at this are not LOW, they reach 80+ so I see no possible way you are cooling your chips lower with the Hyper Evo 212 or similar at 1.300 Someone please give me some figures that make sense otherwise I would expect 1.300 core voltage to be around 90C+ or higher

I'm cooling my 4.7 @ 1.32v with a 212+, but I'm also de-lidded. I could do 1.17 volts with 4.4 but as soon as I started to get into the 4.5 and above clocks is when my chip started to get power hungry. You'll see what we mean when you try and shoot for 4.6 or higher.
Edited by Jayjr1105 - 4/12/13 at 4:43am
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post #3482 of 7041
Quote:
Originally Posted by rockbottom View Post

Hello!
I want to thank the author for making this thread. It was really helpful regarding my overclocking experiences. I have a question about my motherboard, I think the OP has the same? ASUS Maximus V Gene.
I have 16GB RAM, which is rated at 1600Mhz by the manufacturer. However, the BIOS recognizes it as 1333Mhz if I don't change it.
So, right now I don't want to overclock because I'm having some issues with that. Now my BIOS is at its default settings, but the problem is that when I try to set my RAM to 1600Mhz via the Memory Frequency setting in the AI Tweaker tab and I save and exit, my CPU voltage goes up quite a bit - 1.200v. Where as if I use the default settings of BIOS and thus 1333Mhz (not touching anything) CPU-Z shows fluctuation between 0.980v to 1.1-2v. BUT if I set it to 1600Mhz, CPU-Z shows 1.200v, like it's fixed or something.. I also tried setting the timings manually and it didn't work. The other thing I tried was the XMP profile - didn't work too. All of them automatically raise the voltage of the CPU.
How do I evade this? How do I set my RAM manually without raising the CPU voltage?
I hope someone understood what I said haha.
Thanks in advance!
Channing your ram timings and voltage to what the manufacturer recommends should not cause the vCore to change from offset to manual, that doesn’t really make sense. Might try reflashing bios and start over. Also, as noted below, run memtest86+ overnight at recommended settings to see if you get errors.
Quote:
Originally Posted by Jayjr1105 View Post

So I've had inconsistent stability with my overclock (fine one day and next day crashes like crazy with IBT) so I set BIOS to defaults and ran memtest and here is what I found...

Memtest was even really conservative with the timings set @ 11-11-11-28
Sucks in a way but at least I know I don't have a wonky mobo or cpu that needs a ton of voltage to be stable. Now to see how painless (or painful) G.Skill's RMA process can be.
Thank you for posting this.
Is it VERY important for everyone to check their memory before starting the oc process. Many people have spent days trying to get stable only later to learn it was a bad stick of memory. Running memtest86+ overnight, and running Prime95 for a while at F5 defaults with recommended ram timings/voltage before starting the oc process is a good idea.
Quote:
Originally Posted by nature1ders View Post

I don't know where you guys are getting your numbers but for me 3770k @ 4.5 was stable with 1.170 but after testing it 12 hours twice it failed at 10 hours so I increased it to 1.180 but Prime complained it was unable to identify the cores bla so I'm at 1.190 now.
How you get 1.300 is beyond me............ unless this BIOS is lying to me idk.
But let me tell ya the temps with the Hyper Evo 212 at this are not LOW, they reach 80+ so I see no possible way you are cooling your chips lower with the Hyper Evo 212 or similar at 1.300 Someone please give me some figures that make sense otherwise I would expect 1.300 core voltage to be around 90C+ or higher
You may not have much experience with the variety of Ivy chips. There is a very, very large variation in what chips need to be stable at a giving multiplier. It looks about like this: if you are really lucky you can do 4.5 at around 1.15v, if you are really unlucky it can take 1.35v. Needing in the mid 1.20s to stabilize 4.5 would be considered normal or average. That is just the pure luck of the silicon lottery.
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post #3483 of 7041
Quote:
Originally Posted by justanoldman View Post

That is just the pure luck of the silicon lottery.

I never seem to be a winner at this lottery. frown.gif but I guess I'm not a loser either... 1.36 @ 4.7 on 3770k and 1.41 @ 4.7 on 2500k, not great but not a complete loser....
post #3484 of 7041
Quote:
Originally Posted by p33k View Post

I never seem to be a winner at this lottery. frown.gif but I guess I'm not a loser either... 1.36 @ 4.7 on 3770k and 1.41 @ 4.7 on 2500k, not great but not a complete loser....

I need 1.38 for 4.7...
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post #3485 of 7041
Quote:
Originally Posted by justanoldman View Post

Thank you for posting this.
Is it VERY important for everyone to check their memory before starting the oc process. Many people have spent days trying to get stable only later to learn it was a bad stick of memory. Running memtest86+ overnight, and running Prime95 for a while at F5 defaults with recommended ram timings/voltage before starting the oc process is a good idea.

NP thumb.gif One day I had a stable 4.7 a couple days later I ran the same stability tests and everything was crashing. Funny thing is, Windows wasn't even acting up, not even gaming was disturbed. I recently de-lidded so I have been testing with much higher overclocks, so every few days I run IBT to make sure I'm stable. It was driving me insane before finding out the RAM was to blame... I thought I had rapidly degraded my chip tongue.gif
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post #3486 of 7041
After Prime95 crashed after 1 hour on 4.5 @ 1.275v I went up to 1.290v and that passed a 12 hour Prime95. I've got some wiggle room there to possibly do some tweaking, but now that I've got a stable OC working I'm goign to see what it takes to get up to 4.6. biggrin.gif I'm going to give 1.350v a try at first. If that works I'll start backing down, if it doesn't I'll start tweaking my voltage for 4.5ghz.

Thanks again.
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post #3487 of 7041
Quote:
Originally Posted by justanoldman View Post

Channing your ram timings and voltage to what the manufacturer recommends should not cause the vCore to change from offset to manual, that doesn’t really make sense. Might try reflashing bios and start over. Also, as noted below, run memtest86+ overnight at recommended settings to see if you get errors.
Thank you for posting this.
Is it VERY important for everyone to check their memory before starting the oc process. Many people have spent days trying to get stable only later to learn it was a bad stick of memory. Running memtest86+ overnight, and running Prime95 for a while at F5 defaults with recommended ram timings/voltage before starting the oc process is a good idea.
You may not have much experience with the variety of Ivy chips. There is a very, very large variation in what chips need to be stable at a giving multiplier. It looks about like this: if you are really lucky you can do 4.5 at around 1.15v, if you are really unlucky it can take 1.35v. Needing in the mid 1.20s to stabilize 4.5 would be considered normal or average. That is just the pure luck of the silicon lottery.

I have told people in the past to check their systems before OC'ing but most are impatient!
I'm speaking from experience of my PC not allowing me to OC - then I realised a month later it was a faulty RAM module frown.gif

As for 4.5ghz - I'm at 1.27v - depends on your luck - seem as my chip is just beyond the mid-point of average
Good chip would do that in 1.1v bad chip would do it at 1.3v
(that was in response to the person oc'ing to 4.5ghz)
Quote:
Originally Posted by qdrummer21 View Post

After Prime95 crashed after 1 hour on 4.5 @ 1.275v I went up to 1.290v and that passed a 12 hour Prime95. I've got some wiggle room there to possibly do some tweaking, but now that I've got a stable OC working I'm goign to see what it takes to get up to 4.6. biggrin.gif I'm going to give 1.350v a try at first. If that works I'll start backing down, if it doesn't I'll start tweaking my voltage for 4.5ghz.

Thanks again.

That extra 100mhz won't be felt.
I would suggest sticking to 4.5ghz stable at that voltage, simply because you get lower heat and lower voltages running through your CPU
post #3488 of 7041
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post #3489 of 7041
^ I would suggest everyone get the new bios when it comes out for your mobo model. It should fix the bios bug most of us have seen.
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post #3490 of 7041
I loaded optimized settings because of WHEA errors, to check if it was my OC or another factor. It turned out to be my OC, so I want to change my settings back to my previous OC with a bit of a higher voltage.

My question: Do I have to up voltage a little bit (.05) at a time and then reboot, or can I go straight from stock voltage(~1.0v) to my previous voltage (1.2v)? Is there a chance that I would overwhelm the CPU with that extra .2v, or am I understanding circuits wrong?
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