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2500K 24/7 volts?

post #1 of 12
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With so much conjecture and hearsay regarding the 2500k/2600k's voltage specifications (1.52v max safe according to Intel, ranges from 1.35-1.45v by many others), how is this OC for 24/7 use?

I don't fold 24/7 but I use that as my main stability check and folding during the monthly challenges. I don't like running Prime 95 test for too long, but the OC is Prime blend stable for 1hr.

My main concern is the voltage. I'm coming off my Q6600 G0 which was perfectly happy at 1.5v for years. I understand the smaller nm process does not like voltages as much, but is 1.432 under max load going to lead to problems down the road?

All power-saving features are currently enabled. The 1.6Ghz idle uses between 0.9-1.0v. My BIOS is set to use offset vcore at +.085. Any less than that causes instability. CPU PLL Voltage is enable, LLC and Phase, Duty on Ultra High.


Edited by DeltaUpsilon - 6/5/11 at 7:50am
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post #2 of 12
ive been running my 2600k @ 5ghz @ 1.488v for about a month now, including 12hr prime runs without issue or degrading at all. Whether thats dangerous in the long run im not sure but so far so good. It is on High end H2O cooling which helps temps a fair bit.

Fact is though we just dont know about the long term viability yet. Alot of people have had long term success at high voltages so thats a good sign. But no concrete evidence either way yet.
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post #3 of 12
No one really knows as some chips will last months or years with a high OC and voltage while others will die quickly its just the silicone lottery.
Intel have said recently around 1.38v is the safe max to avoid chip degradation which with an average 2500k/2600k should give you a more than enough 4.6-4.7ghz 24/7 OC
Even at stock 3.3ghz my 2500k does NOT bottleneck my gtx570 at all i only run my chip at 4.7ghz and 1.39v as i do video and audio encoding and simply want to run it at that speed. if it dies within warranty well it will be replaced so i'm not too worried.
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post #4 of 12
Quote:
Originally Posted by leezaal View Post
Intel have said recently around 1.38v is the safe max to avoid chip degradation which with an average 2500k/2600k should give you a more than enough 4.6-4.7ghz 24/7 OC
I call BS. Proof?

I've been running my 2500k for 5 months at 1.45v and it's still 12 hour blend stable. I've retested it recently. And I'm on air cooling. I'm not saying this is a 100% safe voltage, but I know for sure Intel have yet to release an official statement saying 1.38v is the safe max to avoid degradation. The article you are talking about was HERE-SAY, no proof.
    
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post #5 of 12
theauviper: nice OC i know mine will do 5ghz at 1.46v stable but it wont boot up at 5.1ghz or higher so i know my chips limit. more than happy with gaming and encoding performance on my rig though to be honest at 5ghz it only encodes video and audio 30sec quicker than at 4.7ghz so for me unless i want to test to destruction i will not run it at 5ghz except for short bursts as i cant do without my rig to wait for a replacement if the chip died at 5ghz.
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post #6 of 12
Quote:
Originally Posted by Scorpion667 View Post
I call BS. Proof?

I've been running my 2500k for 5 months at 1.45v and it's still 12 hour blend stable. I've retested it recently. And I'm on air cooling. I'm not saying this is a 100% safe voltage, but I know for sure Intel have yet to release an official statement saying 1.38v is the safe max to avoid degradation. The article you are talking about was HERE-SAY, no proof.

Yeah I'm with you on the Intel part. I haven't seen anything official from them.

However, I disagree with you that 1.45 is OK because it works on your chip. Maybe on some chips like yours it's OK (maybe you just have a really good one), however *lots* of people have reported degrading the chips at above 1.42 vCore after something short like 1-4 weeks. Others like you seem to do fine above that and have no (at least so far in the short term) negative effects. Everyone's chip is different, it really is the silicon lottery.

I haven't seen anyone reporting any serious degradation or anything like that when under 1.35 vCore.

Personally, I'd find a modest OC between 1.25 and 1.35 vCore and go with that. It's not like a 4.2-4.6 GHz 2500K/2600K is going to be slow in anything. So you get a nice free performance boost over the 3.3 GHz stock, and it also lets you see where the dust settles long term without killing your chip. In another year or so, we should have a good idea of what these things can take long term, and at that point if you want to go higher you'll have the information to make a decision.

My 2 cents.
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post #7 of 12
Quote:
Originally Posted by canna View Post

However, I disagree with you that 1.45 is OK because it works on your chip. Maybe on some chips like yours it's OK (maybe you just have a really good one), however *lots* of people have reported degrading the chips at above 1.42 vCore after something short like 1-4 weeks. Others like you seem to do fine above that and have no (at least so far in the short term) negative effects. Everyone's chip is different, it really is the silicon lottery.
You are right. I agree with this paragraph. I wasn't claiming 1.45v is a safe voltage, I just think these chips can do a little more than 1.38v safely. I would go as far as saying 1.4v to 1.43v depending on how gutsy you are. I might downclock mine as 5Ghz is pointless for what I use it for.
Edited by Scorpion667 - 6/5/11 at 8:48am
    
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post #8 of 12
My apologies for saying intel said 1.38v just checked their pdf documents an innocent mistake on my part but only trying to help some one out and still give them good advice on a respectable OC with out killing their chip.
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post #9 of 12
I also apologize if my comment seemed harsh. 1.38v should be a very safe voltage to use in a 24/7 setting on decent air cooling. I personally dialed back to 4.7ghz at 1.33v for summer clocks.

I have a bad habit of pushing my chips to the very edge for 24/7 clocks and I know this is far from smart overclocking. Trying to get rid of this habit!

I know you were just trying to help =)
Edited by Scorpion667 - 6/5/11 at 9:22am
    
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post #10 of 12
Quote:
Originally Posted by Scorpion667 View Post
I also apologize if my comment seemed harsh. 1.38v should be a very safe voltage to use in a 24/7 setting on decent air cooling. I personally dialed back to 4.7ghz at 1.33v for summer clocks.

I have a bad habit of pushing my chips to the very edge for 24/7 clocks and I know this is far from smart overclocking. Trying to get rid of this habit!

I know you were just trying to help =)
I'm envious of your chip. Mine takes 1.29V (BIOS) taht stays a t 1.29V on load to be stable at 4.3. 1.28V failed prime at about 9 hours (of 12 hours) Mine is just a real dog
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