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3770k 5Ghz 1.6v - Page 15

post #141 of 162
According to Idontcare's tests @Anandtech forums it's often the distance between the IHS and the die.
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post #142 of 162
I de-lidded my 3770k a while ago. My chip is a really bad chip. Can hit 4.6GHz w/1.225vcore but hits a wall there and need
1.45vcore to hit 4.7GHz
1.5vcore to hit 4.8
1.525 to hit 4.9
1.575 to hit 5.0

I had it running at 5.0GHz for about 2 weeks encoding movies 24/7. Temps were under 70c. After about 2 weeks one of the jobs failed. I tried the next one and it failed. While I can boot and run stability tests it will no longer encode at those settings. I had to turn it all the way down to 4.4GHz. @ 1.3vcore to encode with stability. That's some major degradation in such a short amount of time. Again, it's a bad chip to start off.
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post #143 of 162
Thread Starter 
That's very strange voltage for your chip man.
My guess is you didn't fully stabilise for 4.9(if you're like me you would take a look at 4.9 then skip it is my guess)

According to the vcore you listed going from 4.8 to 4.9 only takes 0.025v?? That's strange.

But I don't plan to run it at 5Ghz. Thanks for posting, this is the kind of info I want to know.

Your chip degraded so fast, perhaps due to full load 24/7? I heard 1.45v degrades after 1 yr but they probably don't run it 24/7 like you do.

Again, great info especially for those that thinks their chip degraded "instantly" when they run at 1.4v.

I guess 2 weeks before I upgrade I will run it at 5Ghz?? tongue.gif
post #144 of 162
Quote:
Originally Posted by itznfb View Post

I de-lidded my 3770k a while ago. My chip is a really bad chip. Can hit 4.6GHz w/1.225vcore but hits a wall there and need
1.45vcore to hit 4.7GHz
1.5vcore to hit 4.8
1.525 to hit 4.9
1.575 to hit 5.0

I had it running at 5.0GHz for about 2 weeks encoding movies 24/7. Temps were under 70c. After about 2 weeks one of the jobs failed. I tried the next one and it failed. While I can boot and run stability tests it will no longer encode at those settings. I had to turn it all the way down to 4.4GHz. @ 1.3vcore to encode with stability. That's some major degradation in such a short amount of time. Again, it's a bad chip to start off.
i feel for you man
someone told me my chip might of not been "broken in"

I ran 1.35vcore at 4.5ghz for over 30days with a steady 80%cpu/ram++ in use, i would idle 1.344 and droop to 1.332/1.320 at lowest , never had a whea error or problem in my work
i ran 0.005 vcore all the way up to 1.495 trying to get 4.7ghz stable, didnt even RUN it more than 10minutes since it would fail various combinations of stress tests
tried to go back to 4.5ghz and now i required 1.36 vcore :/
i thought again about just ramping 1.52v and running 4.7 to see if i could get stable, but i dont want to end up needing 1.4v for 4.5ghz biggrin.gif
Btw, i know me and a ton of people who would be happy with a 4.6ghz 1.224v chip biggrin.gifthumb.gif
  
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post #145 of 162
Quote:
Originally Posted by INCREDIBLEHULK View Post

i feel for you man
someone told me my chip might of not been "broken in"

I ran 1.35vcore at 4.5ghz for over 30days with a steady 80%cpu/ram++ in use, i would idle 1.344 and droop to 1.332/1.320 at lowest , never had a whea error or problem in my work
i ran 0.005 vcore all the way up to 1.495 trying to get 4.7ghz stable, didnt even RUN it more than 10minutes since it would fail various combinations of stress tests
tried to go back to 4.5ghz and now i required 1.36 vcore :/
i thought again about just ramping 1.52v and running 4.7 to see if i could get stable, but i dont want to end up needing 1.4v for 4.5ghz biggrin.gif
Btw, i know me and a ton of people who would be happy with a 4.6ghz 1.224v chip biggrin.gifthumb.gif

It should be broken in by now, it doesn't take long at all.
I find that chips almost always do their best new out of the box, within hours or days (depending on use) they generally need a voltage bump to do the same clocks as it did when first booted up. I usually think of this as breaking in (actually degrading, but chips all seem to do this first small degrade from new), then unless abused it should be able to hold the clocks & new voltage for a long time from there.

For temps & voltage, it can depend on the leakiness of the chip. I've a had a few ivy, seems like the leaky high voltage chips get better temps than the less leaky chips that need less, I've had one that passes IBT at 4.5Ghz 1.12V, & it was about the same load temps as one that needed 1.27V for 4.5Ghz.
The lower voltage chips will overclock higher with adequate cooling than the higher voltage chips though, so they are more desirable.
    
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post #146 of 162
Quote:
Originally Posted by FtW 420 View Post

It should be broken in by now, it doesn't take long at all.
I find that chips almost always do their best new out of the box, within hours or days (depending on use) they generally need a voltage bump to do the same clocks as it did when first booted up. I usually think of this as breaking in (actually degrading, but chips all seem to do this first small degrade from new), then unless abused it should be able to hold the clocks & new voltage for a long time from there.

For temps & voltage, it can depend on the leakiness of the chip. I've a had a few ivy, seems like the leaky high voltage chips get better temps than the less leaky chips that need less, I've had one that passes IBT at 4.5Ghz 1.12V, & it was about the same load temps as one that needed 1.27V for 4.5Ghz.
The lower voltage chips will overclock higher with adequate cooling than the higher voltage chips though, so they are more desirable.
seems today i ran 1.5v for 4.7ghz without a whea error for about 1-2hours of stressing, i didn't want to leave prime running.
i felt real bad running 1.5V, temps never broke 75C with all my rad fans on low speed
while i benefit from the 200mhz gain, i dont know if my chip will last
  
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post #147 of 162
Quote:
Originally Posted by INCREDIBLEHULK View Post

seems today i ran 1.5v for 4.7ghz without a whea error for about 1-2hours of stressing, i didn't want to leave prime running.
i felt real bad running 1.5V, temps never broke 75C with all my rad fans on low speed
while i benefit from the 200mhz gain, i dont know if my chip will last

i dont know about ivy but my sandy has been running 5ghz with 1.48-1.50 for over a year and i fold on it some mosty during the events. Folded the entire week of the chimp challenge not a problem that was just 1-2 months ago tops.
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post #148 of 162
It's very possible you run p95 for 50 hours only to crash in 5 minutes on h264 on a slower preset, but it's not likely. You need to make sure WHEA errors aren't occuring during your p95 runs.
Quote:
If I set LLC so there's still a little vdroop, the CPU will run on lower voltage while prime95 is putting load on it. I'll test with prime95, and then I can assume that normal programs will run with the CPU getting more voltage.

If I use the max LLC setting on my board, voltage will actually increase when prime95 is doing its stuff. Normal programs will run at a lower voltage than what the prime95 stress test ran at. Could this be the cause of prime95 running stable but programs still crashing afterwards?

Doesn't quite work like that. Your software won't tell you your accurate voltage, it just tells you an average, so your peaks and dips aren't going to be truly reported. It's very likely when your voltage starts to go up, that it'll report decreasing voltage. You have to use a multimeter to get accurate voltage read-outs, even with high end boards...

What LLC does is make it so your voltage 'dips' less, as your voltage is essentially a wave, up and down, up and down, very quickly. It's never stable at a set voltage, software just reports an average to you that's easier to read. However these dips let your CPU use less voltage, it keeps the chip cooler and use less voltage when it doesn't need as much. Raising LLC means your chip gets much hotter as the dips are smaller, and your true voltage has much less variance, but your peak voltage gets much higher.

When overclocking you pretty much just want to use the 2nd highest LLC setting. The higher you set LLC, the higher your voltage, but it also increases temps. So generally, on ambient overclocks, use max LLC and you'll need significantly less voltage for stability, but your true voltage will be much higher as Vcore = VID + Offset + LLC. But on too little LLC, and you generally need to raise your voltage so high that it'd be higher, than if you used just the 2nd highest LLC.

Vdroop is a good thing, it keeps your chip much cooler. You can get an approximation of your voltage using software, but you can't determine things like vdroop, by the very nature of how your system reports an average, things like vdroop aren't reported. Of course you are going to be more stable on max LLC, that's because you are adding more voltage. The idea is using the ideal LLC setting, you need less true voltage than you'd need if you didn't use it or used the wrong LLC setting.

Unless you want to spend tons of time testing with a multimeter, like myself, sin0822, and a few others have, just set your LLC to the 2nd highest setting when on ambient overclocks. Many, many people have proven that the 2nd highest setting is the best for air/water.
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post #149 of 162
Quote:
Originally Posted by lock2701 View Post

That's very strange voltage for your chip man.
My guess is you didn't fully stabilise for 4.9(if you're like me you would take a look at 4.9 then skip it is my guess)

According to the vcore you listed going from 4.8 to 4.9 only takes 0.025v?? That's strange.

But I don't plan to run it at 5Ghz. Thanks for posting, this is the kind of info I want to know.

Your chip degraded so fast, perhaps due to full load 24/7? I heard 1.45v degrades after 1 yr but they probably don't run it 24/7 like you do.

Again, great info especially for those that thinks their chip degraded "instantly" when they run at 1.4v.

I guess 2 weeks before I upgrade I will run it at 5Ghz?? tongue.gif

Yeah it needed huge vcore increases to hit 4.7 and 4.8... I was a little suspicious when it booted at 4.9 with the same vcore as 4.8. Wasn't stable. I was just using IBT. I was originally folding with that chip w/ 4.5 @ 1.225vc. Got new water cooling and ran it at 4.8 encoding for a while. Then jacked it up to 5.0. Encoding times were so much better at 5.0 biggrin.gif
Didn't last long though.
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post #150 of 162
Thread Starter 
Quote:
Originally Posted by itznfb View Post

Yeah it needed huge vcore increases to hit 4.7 and 4.8... I was a little suspicious when it booted at 4.9 with the same vcore as 4.8. Wasn't stable. I was just using IBT. I was originally folding with that chip w/ 4.5 @ 1.225vc. Got new water cooling and ran it at 4.8 encoding for a while. Then jacked it up to 5.0. Encoding times were so much better at 5.0 biggrin.gif
Didn't last long though.

If I dare say, your chip wasn't stable at 1.57v it probably needed 1.6v+ for 5Ghz. These stress tests programs only show "some" indication of stability, I don't pay attention to these programs when it runs. Only run it so that my computer is doing something, what's really important is Event Viewer showing errors or not. I run it when I can't be in front of the computer otherwise I run a variety of programs for about 1 hr each while checking error and do that for 5-7 days. If no error, then I'm pretty sure it's stable.
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