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How to degrade a 2600K most effectivly? - Page 8

post #71 of 171
I'm really glad someone is taking the time to do this, but it seems like you are trying to do it rather quickly. If you want very accurate data than can really be used to prove things about chip degradation, I would advise you to move much slower. Instabilities can occur so infrequently that you need a long period of time to take enough data points to really see the real trend. With most people running about 1.4V and 4.8Ghz (from what I've seen anyway) its not going to prove a lot by putting crazy high voltages, temps, and loads on the chip since clearly those will, and have, damaged the chip)

1 blue screen in 2 days of testing vs 4 bluescreens in 2 days of testing at a different voltage and speed (even lower ones!) may very well be withing the realm of random variation even though it seems like the chips are degrading.

Again, I love that you are doing this, but make sure to place close attention to details to make sure this 2600k dies an honorable death for science!
    
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post #72 of 171
Quote:
Originally Posted by Ishinomori View Post
I know its not my money, and i dont know if you would have the money to run identical test benches, but as a means of testing:

~ Find the the highest possible GHz (multi) on each CPU running 1.25v load (to keep the vcore the same to measure degredation) and use that as the degredation basis.
~ Running 2x 2600k's at the different test methods (on identical test beds, same RAM/Mobo/Cooler) i.e 1 on high temp 85-90 and the other on high vcore 1.52v load vcore and run the exact same testing method for 2-5days, then let the CPU's rest a day then test them again at the designated degredation basis... That way the ambient temps would remain equalised throughout the test...
~ Also, i would suggest F@H as it is a very common practice, and not everyone runs Blend/IBT/Small fft's for that long.

As stated, i have neither the OC'ing know-how (OC experience = ~ 18hrs total) or the funds to build two identical rigs to purposefully degrade two 2600k's simultaniously.

But i applaud you for spending your well yearned dosh to further the knowledge of OC'ing SB

Rep+ and Subbed...

Cheers,

Ishi
^^
I have to quote this.
Finding a certain required ghz for 1.25v (or the lowest possible vcore to be stable at that speed) is a very good idea. I use 4.5 ghz at 1.260v to test whether my CPU has degraded from higher vcores or not. If I run it at 5 ghz and it later passes 4.5 ghz 1.260v 12 hour prime blend (1.254v will bsod after like 9 hours unles I raise the PLL voltage, while 1.260v is fine with default PLL), then I know it didn't degrade further.
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post #73 of 171
Intel recommends RAM voltage of 1.5 max for SB.
I'm pretty sure this is the cause.
To all people who had chip degradation; what voltage did you run the RAM at?
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post #74 of 171
Quote:
Originally Posted by L36 View Post
Intel recommends RAM voltage of 1.5 max for SB.
I'm pretty sure this is the cause.
To all people who had chip degradation; what voltage did you run the RAM at?
SB will also run up to 1.65v.
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post #75 of 171
Quote:
Originally Posted by LethalRise750 View Post
SB will also run up to 1.65v.
With degradation I presume ?
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post #76 of 171
Quote:
Originally Posted by LethalRise750 View Post
SB will also run up to 1.65v.
Yeah, but Intel recommends nothing above 1.5v.
i7 X58 will also run about 1.65, but anything above that damages the CPU.
You can even run at 2v, its not like anyone will stop you from doing so.
Edited by L36 - 5/27/11 at 7:53pm
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post #77 of 171
Quote:
Originally Posted by thealex132 View Post
But it has taken +9 years to do so (P4), so I'm sure you won't see it in such a small period of time

And who runs 1.65 on the RAM with 1.5+ Vcore O.o
I can overclock my RAM from CL9 to CL7 and undervolt it from 1.65v to 1.5
Thealex:
I ran my first P4 northwood at 3.9 ghz 1.7v, and within THREE weeks, it wouldn't even POST at 3.7 ghz at default voltage, and it wasn't stable at 3.6 ghz default voltage anymore (originally the cpu was fully stable at 3.7 ghz default vcore). The most it could do was 3.5 ghz at stock, so I sold it at a loss, advertised as being able to do 3.4 ghz at stock.

A second P4 northwood degraded after a month at 3.8 ghz at just 1.65v. (remember default vcore was 1.55v). It didn't degrade as much as the first, but I still RMA'd it.

Third was a bad clocker from the start...sold it again at a loss.

Fourth was a P4 EE. Paid a $1,000 for it. Epic waste of money but it was the fastest cpu at the time. Even that degraded some, just by running it at 1.6v, +.05v over stock.

I don't think the prescotts had the same problem as the GNDS/SNDS northwoods. I don't know about the early P4's, though.

Now do you see how much money listening to other people cost me? Back during those times, i was called an incompetent overclocker. Not long after threads erupted all over the forums giving proof that SNDS/GNDS was very real.

No one was willing to buy me a new chip for being wrong. No one.
I have to look after myself now. Sorry if I sound rude, but when people try to steer me the wrong way, and they are wrong--I've learned to do things myself and find out things myself--my way, at my pace.
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post #78 of 171
Quote:
Originally Posted by L36 View Post
Yeah, but Intel recommends nothing above 1.5v.
i7 X58 will also run about 1.65, but anything above that damages the CPU.
You can even run at 2v, its not like anyone will stop you from doing so.
Intel recommends nothing over 1.52 VID.
VID isn't the same as vcore.
Their specs do not call for loadline calibration to be applied to lower vdroop--this is something done via motherboard manufacturers as a bonus to overclockers.

Just keep that in mind.
(if you disagree with that, please present proof, along with an explanation of this proof using Intel's VRD 12/thermal specification documents, please
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post #79 of 171
Quote:
Originally Posted by Falkentyne View Post
Intel recommends nothing over 1.52 VID.
VID isn't the same as vcore.
Their specs do not call for loadline calibration to be applied to lower vdroop--this is something done via motherboard manufacturers as a bonus to overclockers.

Just keep that in mind.
(if you disagree with that, please present proof, along with an explanation of this proof using Intel's VRD 12/thermal specification documents, please
I'm talking about RAM voltages, NOT Vcore.
Read up on the posts before replying.
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post #80 of 171
Quote:
Originally Posted by L36 View Post
I'm talking about RAM voltages, NOT Vcore.
Read up on the posts before replying.
I know right. But why ram under 1.5v ? I mean ram voltage is the voltage in the sticks, it's not related to the chip (IMC) ? Or am I brain farted @ this time of the day?

To the guy not reading:

Actualy VID = Vcore.

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