Picked up a i5 2500k Overclocks?

[jtisgeek]

Picked up a 2500k to play with . Will go in one of my water setups just curious what you guys are seeing speed wise thanks.

Any tips on what voltage and settings are needed to hit 5ghz , Am thinking that on water anything less than 5ghz I would be disappointed .

 

[Krynj]

With these new i7/i5 chips, it's not so much the heat, as it is voltage. There's not really any consensus as to what's safe voltage, and what isn't. I could probably have a 24/7 5GHz OC on my 2600K, but I'm just not comfortable with the voltage it would take.

Under load, I'm anywhere between 1.37 and 1.38v on my 2600K.

 

[slag]

You should really just read back about a month. There were several threads about what speeds people were getting with these K chips.

 

[jtisgeek]

Yeah am been trying to go back and read some of the old stuff. Haven had the time to be on here as much.

 

[Diogenes2]

For 5g you are probably looking at 1.45v or more..

My 4.9 takes 1.42 according to CPUZ ...

Some people don't think this is safe...
I'll find out when it quits working, I guess..

P.S.
As far as other discussion, there is an SB overclocking thread, but I don't recall anyone reporting 5g stable..

SB Overclocking Thread

SB Overclocking sort of fizzled with the P67 flaw.. Should start jumping again anytime now..

 

[Hogan773]

For 5g you are probably looking at 1.45v or more..

My 4.9 takes 1.42 according to CPUZ ...

Some people don't think this is safe...
I'll find out when it quits working, I guess..

P.S.
As far as other discussion, there is an SB overclocking thread, but I don't recall anyone reporting 5g stable..

SB Overclocking Thread

SB Overclocking sort of fizzled with the P67 flaw.. Should start jumping again anytime now..

Yeah glad you're trailblazing for me......I am a voltage pansy.....my OC doesn't get past 1.25V cause beyond benchmarks, I'd rather drive a bit more slowly and not have to spend another $300 in 6 months time if it turns out these chips are more sensitive to voltage than others in the past.

 

[Dadofamunky]

See my sig for details. I'm still in the midst of finding the upper limits. I've been able to pass 35 runs of Intel Burn Test at 4.7 GHz and successfully ran an hour of Prime small FFTs before I had to shut the machine down to go to sleep. I am at 1.36V. NOT gonna go any higher. Really, couldn't be happier with my purchase unless I'd swallowed hard and grabbed a 2600K.

 

[Drsignguy]

My 2600k is crunching @ 4.2 with 1.272 under full load with F@H and been doing it now for a month. I know I could go higher but I like the voltage under at or around 1.3. Steady temps in the low 50's using the H70 cooler w/ 2 fans push/pull setup.

 

[Hogan773]

My 2600k is crunching @ 4.2 with 1.272 under full load with F@H and been doing it now for a month. I know I could go higher but I like the voltage under at or around 1.3. Steady temps in the low 50's using the H70 cooler w/ 2 fans push/pull setup.

You should be able to do better than that? My 42x OC with a 2600K sits at 1.22V under load using an Offset Voltage setting of minus 0.05V and LLC turned off.

 

[smakme7757]

I got my 2600K to 5.5Ghz @ 1.58v HT on benchmark stable. 5Ghz was attained @ 1.50v HT on system stable. The sweet spot for my 2600K with HT on is 4.5Ghz i'd say @ 1.285v (1.295v with W7 SP1).

The 2500K takes slightly less voltage as it doesn't have HT.

 

[jtisgeek]

Nice numbers guys am ready to see what this thing can do. I do wish we had a better idea on what was the voltage long term affects on this cpu's.

So who's taking bets on which cpu dies first.:twisted:

 

[lowlymarine]

You should be able to do better than that? My 42x OC with a 2600K sits at 1.22V under load using an Offset Voltage setting of minus 0.05V and LLC turned off.

Are you sure that's 100% stable, even under say 2 threads of full load rather than just 8? That seems like impossibly low voltage; I have to get about 1.288v full load on my 2600k to keep 4.2GHz fully stable. At ~1.25v it takes hours to actually crash under 2 threads and may never crash under 4 or 8, but it still isn't "completely" stable without a significant additional bump. 4.4 in turn takes about 1.338v and 4.5 about 1.356 for full stability. That's with vDroop at high (though setting to Low doesn't seem to make any difference in either voltages or stability), and there's no manual Offset Voltage on the MSI P67A.

Then again all chips are different.

 

[Hogan773]

Are you sure that's 100% stable, even under say 2 threads of full load rather than just 8? That seems like impossibly low voltage; I have to get about 1.288v full load on my 2600k to keep 4.2GHz fully stable. At ~1.25v it takes hours to actually crash under 2 threads and may never crash under 4 or 8, but it still isn't "completely" stable without a significant additional bump. 4.4 in turn takes about 1.338v and 4.5 about 1.356 for full stability. That's with vDroop at high (though setting to Low doesn't seem to make any difference in either voltages or stability), and there's no manual Offset Voltage on the MSI P67A.

Then again all chips are different.

Hmmmm, well, I dunno. I haven't gone in and run single threads for hours, as you say. I've run Prime for hours, but that's all 8 threads. I've run OCCT and IntelBurnTest. I guess more importantly, I've USED the PC for the past several weeks with this OC on all the time, and I've never gotten a BSOD or any noticeable errors.

So what should I be doing/testing to ensure that my OC is "COMPLETELY" stable, as you say?

 

[aigomorla]

Am thinking that on water anything less than 5ghz I would be disappointed .

then be prepared to be disappointed.

Your going to run into dangerous voltage issues b4 heating issues. :whiste:

So what should I be doing/testing to ensure that my OC is "COMPLETELY" stable, as you say?

Meh, stability is all in the user.

To some stability means if it can game without hangs, BSOD, and run them flawlessly, its stable.
To others if it can run a crunching program for weeks on end, its considered stable.
To others again, if it can do prime for a gazllion hours its stable.

To me, if you dont see any BSOD's when your gaming, encoding, or doing anything, its stable.
But my inital stability must pass a linX for at least 10 runs and not have a shutdown for a week while meeting the top line, b4 i knock it off as stable.

 

[lowlymarine]

So what should I be doing/testing to ensure that my OC is "COMPLETELY" stable, as you say?

Well if you aren't seeing crashes in what you're doing then it's stable enough. Like I said, all chips are different, and you seem to have hit some sort of binning motherlode.

 

[Hogan773]

Well if you aren't seeing crashes in what you're doing then it's stable enough. Like I said, all chips are different, and you seem to have hit some sort of binning motherlode.

Maybe - although I thought I've seen others at similar voltages.

Maybe you should try offset voltage and see what yours does?


Actually I'm running 1 worker on Prime right now, per your message, and it is running at 1.18 according to HW Monitor. Not sure if this is how you were testing stability or if you were shutting down the other cores via Bios.

 

[jtisgeek]

What have you guys set your power draw levels too?

Right now looks like I can only do 4.4 at 1.3 haven wanted to push more volts right now.

Man this thing is quick at 4.4 for sure even feels faster than my over clocked 980x.

These new chips are a steal for the price.

 

[RavenSEAL]

Anything under 5GHz disappointing? You bought the wrong chip then my friend, wait a few years unless you don't mind replacing it in 5 months.

 

[jtisgeek]

Has anyone had problems with the turbo working in games?

Casue tongiht I was playing star trek online . It usally put a little bit of load against my system but not to bad I notice my fps are down.

I pull up cpu info and notice my cpu is at 1.6 so it's never clocks up. So to test I turn off speed step in the bios come back launch game goes to 3.3 stock game runs locked at 60 fps which is what it should be.

So my question is has any one seen this type of thing? I don't really want to set a constant speed I like it clocking down.

Side note my temps have never been over 60c usually in the mid to low 50's.