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Haswell Overclocking Guide [With Statistics] - Page 326

post #3251 of 19539
Quote:
Originally Posted by Gomi View Post

Went out and bought a bunch of 4770K - Knowing I could return the ones I did not want for a full refund (If done so within 14 days).

Got a mountain of crap ones before I struck gold with a batch 310B487.

4.8Ghz @ 1.25Vcore, wprime 32M and 1024M stable - Temperature never exceeded 70C.

Testing on a Thermalright HR-02 Macho (Stock fan) - CPU will be running direct die cooling under custom water for a month before moving over to Phase Change System.

Will of course run it through a 3-6 hour stress and post back with results.


What store allowed this?
 
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post #3252 of 19539
Quote:
Originally Posted by Darkwizzie View Post

It's not about safety concerns but the idea that too high vrin when not needed causes the CPU to need more vcore. Would like more testing done.

Buy me some more chips, preferably a few 4770k's and I'll test it for you. wink.gif
post #3253 of 19539
Quote:
Originally Posted by Gomi View Post

Went out and bought a bunch of 4770K - Knowing I could return the ones I did not want for a full refund (If done so within 14 days).

Got a mountain of crap ones before I struck gold with a batch 310B487.

4.8Ghz @ 1.25Vcore, wprime 32M and 1024M stable - Temperature never exceeded 70C.


That is probably one chip out of 70-100 ?

Congratulations on that.

I only find the idea of sending back bad OC chips not ok. Bad OC capability is no reason to return a working chip.
The retailer is probably going to send the opened/ used chip to another customer. Meaning once you get an opened ChipBox OC is probably very BAD...

In some countries in Europe you have the right to return Online bought goods within 14 days.
Edited by Alxx - 9/29/13 at 7:14am
post #3254 of 19539
Hmm not sure why you guys need more vcore voltage when upping the input...that's going against the grains completetly if that's the case than I would look into what was actually stable to begain with...because from talking with certain folks and actual tesing shows increasing input voltage should and does increase stability and should help you lower your vcore by a notch or if your getting .1v difference that's very wrong lol and something else is cuasing an issue for you.

Example:

2.1 input voltage allows me to do 5ghz at 1.49v on xtu for 8 hours...
2.0 input voltage requires me to do 5ghz at 1.51v for 8 hours..
same with 4.9 and down.

thumb.gif


OH AND SMEXY CHIP ALXX thumb.gif

and no they do not repackage them at the stoire lol and sell them to other customers...they get sent back to intel and either destroyed/recycled.
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post #3255 of 19539
Quote:
Originally Posted by Clexzor View Post

Hmm not sure why you guys need more vcore voltage when upping the input...that's going against the grains completetly if that's the case than I would look into what was actually stable to begain with...because from talking with certain folks and actual tesing shows increasing input voltage should and does increase stability and should help you lower your vcore by a notch or if your getting .1v difference that's very wrong lol and something else is cuasing an issue for you.

Example:

2.1 input voltage allows me to do 5ghz at 1.49v on xtu for 8 hours...
2.0 input voltage requires me to do 5ghz at 1.51v for 8 hours..
same with 4.9 and down.

thumb.gif


OH AND SMEXY CHIP ALXX thumb.gif

and no they do not repackage them at the stoire lol and sell them to other customers...they get sent back to intel and either destroyed/recycled.


I was stable for over 8 hours using Prime 95 with 1.95 VRIN and 1.295 Vcore, I am not fully stable with 1.85 VRIN and 1.8 Vcore, but it is stable for a few hours, so I am not far off. My actual testing has proved that. We are talking about two different scenarios when it comes to out VRIN. Mine was waay to high because I'm only at 4.5Ghz, whereas you are at 5. Which, by the way, we should switch chips so you can do some testing. wink.gif

Nothing else could be causing my issue besides my VRIN being too high for my overclock. XMP is off and uncore is set at 1.15 and 34x on both tests. The only thing changing is vcore and vrin.
post #3256 of 19539
Quote:
Originally Posted by jameyscott View Post

I was stable for over 8 hours using Prime 95 with 1.95 VRIN and 1.295 Vcore, I am not fully stable with 1.85 VRIN and 1.8 Vcore, but it is stable for a few hours, so I am not far off.

You should also test the Ring voltage in 0.01 increments in addition to Vrin. That way I found 4,6 Ghz stability, and I thought it would never become stable @4,6 Ghz with minimal Vcore, optimal Vrin. It might not be the case with your OC but it is worth trying.
post #3257 of 19539
Quote:
Example:

2.1 input voltage allows me to do 5ghz at 1.49v on xtu for 8 hours...
2.0 input voltage requires me to do 5ghz at 1.51v for 8 hours..

You're using an example where higher VRIN would be NEEDED. You're at 1.5 vcore! Of course you need way more. That's just reinforcing the evidence for targetting a certain range for whatever Vcore, and not overshooting or undershooting

If you were unstable at 1.25vcore, setting over 1.8 or so vrin would be a mistake AFAIK and would just make you need even more vcore from what i've seen
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post #3258 of 19539
Quote:
Originally Posted by Alxx View Post

You should also test the Ring voltage in 0.01 increments in addition to Vrin. That way I found 4,6 Ghz stability, and I thought it would never become stable @4,6 Ghz with minimal Vcore, optimal Vrin. It might not be the case with your OC but it is worth trying.

I'll definitely try that out when I get a chance. I think that might be my problem because even at 1.9 to 2 VRIN and up to 1.3 Vcore I can't get 4.6 to even boot. I don't think I would have to jump up .2 volts just to boot... I haven't really had that much time in the past two weeks to actually mess with it, so we'll see.
post #3259 of 19539
Quote:
Originally Posted by Cyro999 View Post

You're using an example where higher VRIN would be NEEDED. You're at 1.5 vcore! Of course you need way more. That's just reinforcing the evidence for targetting a certain range for whatever Vcore, and not overshooting or undershooting

If you were unstable at 1.25vcore, setting over 1.8 or so vrin would be a mistake AFAIK and would just make you need even more vcore from what i've seen

I said that applies all the way down...this thread is the only thread ive seen on many forums where you guys are getting these odd results and somehow becoming more unstable with more vrin......

Just trying to help some of you as it seems yall are having weird issues. Every person ive helped s achieved better results with more input voltage reguardless of the overclock. stock vrin is 1.8v not 1.6 or 1.5... in fact a lot of chips to become stable and increase uncore you will need a bit more than just above stock....

Anyways taker it or leave it...reset your cmos people clear your left over settings..tongue.gif
I have had 4 4770ks and messed with several other by hand all the same...all benefit from increased vrin.
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post #3260 of 19539
For example like 80 pages back lol

User Jellzroc:

I was able to get to a stable 44 on 1.37 volts but I brought it down to 43 with 1.3 just for chip longevity and turned on adaptive mode with a 1.3 turbo.

I've heard that since the vrms are on the CPU buying a higher end board would do very little in terms of oc ability. I currently use the z87-k which is pretty much the cheapest asus mobo out there.

I'm pretty sure I lost the silicon lottery but would getting a higher end mobo give me more oc ability? I've heard rumors that some of the budget boards were somehow nerfed by intel to weaken their oc ability. This could be just be. What do u veterans think?

Me:

Did you increase input voltage vrin/vccin 1.9-2.0v try those values and report back try the following...

44x 1.35v

uncore 41x 1.21v

input voltage vrin/vccin 1.95v

good luck

JellzRoc:

Wow made a huge difference. Thanks!!!! 44 on 1.36 but seems much more stable
Edited by Clexzor - 9/29/13 at 8:29am
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