CPU over locking help

mickyflinn said:
Ok i just did mine and mine is showing 4ghz

Try this before clearing the cmos, set the cpu clock back to 34 then go into advanced cpu core features. Set the intel turbo boost to 40 for all 4 cores , save and reboot.
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Ok, just tried that. Still showing as 3.6
I also tried with the Turbo Boost Technology on both Auto and Enabled.
 
Surely there is something causing it to be stuck at 3.60Ghz?
I remember trying to OC the CPU 3 years ago after putting this rig together. I didn't play about with the voltage as I was a bit nervous doing it for the first time unsupervised, But I'm sure I managed to get it up to an unstable 4.2, then knocked it down to a stable 4.0. If i'm remembering correctly.
The CPU was changing as it was supposed to according to the monitoring program. But for some reason it's just not doing it now...
 
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Ok.... so I cmos'd the mobo and then loaded default settings in bios and changed the clock speed to 40 and the intel turbo boost to 40 on all 4 cores.

The VCore is still on auto.
I'll be happy with a steady 4.20Ghz speed unless a little higher is easily achievable without making it burn out? Will I need to change the voltage for that?
I'm stressing the CPU at the moment and the temps have gone to 62-68degrees and its been running for about 10 mins now on full load. How much is too much on the temp?
 
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allnamestaken84 said:
Ok.... so I cmos'd the mobo and then loaded default settings in bios and changed the clock speed to 40 and the intel turbo boost to 40 on all 4 cores.

The VCore is still on auto.
I'll be happy with a steady 4.20Ghz speed unless a little higher is easily achievable without making it burn out? Will I need to change the voltage for that?
I'm stressing the CPU at the moment and the temps have gone to 62-67degrees. How much is too much on the temp?
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I don't know about Prime. Cinebench max temp of 70C is a good marker for me. There are a few things that will make it run about 5 degrees hotter than that (H.264 encoding etc), and 75C is about what you want as max for regular use.

Every chip differs so you'll have to find out if you'll need more Vcore or not. If you do, adjust Vcore in +0.025 increments. Cinebench is a fast bench so it's useful for a preliminary feel of an overclock. i.e. If it keeps passing Cinebench, keep increasing the overclock. Once it fails, dial it back 0.1GHz, and test with other stuff. Prime if you want. Asus Realbench is good.
 
Danny75 said:
I don't know about Prime. Cinebench max temp of 70C is a good marker for me. There are a few things that will make it run about 5 degrees hotter than that (H.264 encoding etc), and 75C is about what you want as max for regular use.

Every chip differs so you'll have to find out if you'll need more Vcore or not. If you do, adjust Vcore in +0.025 increments. Cinebench is a fast bench so it's useful for a preliminary feel of an overclock. i.e. If it keeps passing Cinebench, keep increasing the overclock. Once it fails, dial it back 0.1GHz, and test with other stuff. Prime if you want. Asus Realbench is good.
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Ok, so I've left the Vcore at auto (don't know if that's a good thing or a bad thing)
I've just set the cpu to 4.40Ghz and it ran Cinebench with no problems. However, when I ran Prime95 the temps rapidly went up to 80degrees within 15 seconds so I stopped it.

I'll try it at 4.20Ghz and maybe stop being greedy ;)
 
Just tried it at 4.20Ghz, only for about 15 mins as I want to go to bed soon... but the temps hit a max of 75 degrees.
Is that too high?

If I start playing around with the VCore, is it possible to reduce the temps while still running at 4.2Ghz?
 
stooeh said:
Auto volts will often pump way more voltage than necessary :)
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I've been messing around with the voltage since my last post.
Tried 4.2Ghz with 1.1V and pc crashed after 2 mins in to stress test.

I've now got it running at 4.2Ghz with 1.125V. Max temp is 71 degrees after a 30 minute Prime95 max load stress test, but it's averaging about 68 degrees.
The cores are idling between 25-30 degrees.

Are those temps high enough? Or would you stretch for 4.4Ghz?
 
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allnamestaken84 said:
I've been messing around with the voltage since my last post.
Tried 4.2Ghz with 1.1V and pc crashed after 2 mins in to stress test.

I've now got it running at 4.2Ghz with 1.125V. Max temp is 71 degrees after a 30 minute Prime95 max load stress test, but it's averaging about 68 degrees.
The cores are idling between 25-30 degrees.

Are those temps high enough? Or would you stretch for 4.4Ghz?
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What temp you getting with Cinebench? You can't find a regular voltage/temp based on Prime. Too hot (depending on which test). It's an exception. That's why I don't bother with it. Cinebench/Asus Realbench/H.264 encoding, those will tell you how hot at max your CPU will be gaming etc.
 
Danny75 said:
What temp you getting with Cinebench? You can't find a regular voltage/temp based on Prime. Too hot (depending on which test). It's an exception. That's why I don't bother with it. Cinebench/Asus Realbench/H.264 encoding, those will tell you how hot at max your CPU will be gaming etc.
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Wouldn't that depend on what type of games you play?

I just ran it with Cinebench and got max temps of 50 degrees.
 
allnamestaken84 said:
Wouldn't that depend on what type of games you play?

I just ran it with Cinebench and got max temps of 50 degrees.
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I've never played or heard of a game that would give the CPU more than 5 degrees in excess of Cinebench. Only certain extreme "torture" benchmarks like Prime (depending on the Prime test) and Intel Burn Test (if you leave the overclock on Adaptive not Fixed/Manual). For those it's ok if CPU reaches 90C. It means normal usage, when maxed, will be 15 or 20C lower and that's perfectly fine.

Now if you were actually doing plenty of work with rare Prime-like programs (using AVX instructions) then yeah you'd want to keep Prime temps lower.

Otherwise you still have a bunch of voltage headroom to go if you're only getting 50C with Cinebench. :)

I said use Prime if you want, as you seem to like it, but I meant for stability checking, not as a marker for temperature.

Reading back through the thread, you may also want to do what Micky mentioned, i.e. leaving the main clock on 34, and just setting the turbo'd cores to 42 etc, as that will rest your CPU even more and still give you the top power when needed.

set the cpu clock back to 34 then go into advanced cpu core features. Set the intel turbo boost to 40 for all 4 cores , save and reboot.
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I always have voltage/temp etc sensors displayed in my system tray, so that I don't miss out on anything "interesting". I have never seen anything push CPU temps as high as Prime/Intel Burn etc.
 
Ah ok, missed that.
But if I got 70 max on cinebench, a full load stress test is likely to be near 100 degrees right? I know you said that nothing uses that much power... but if I'm gonna run a full load stress test for 30+ minutes at that temp to check for stability, isn't that a bit dangerous for my cpu?
 
allnamestaken84 said:
Ah ok, missed that.
But if I got 70 max on cinebench, a full load stress test is likely to be near 100 degrees right? I know you said that nothing uses that much power... but if I'm gonna run a full load stress test for 30+ minutes at that temp to check for stability, isn't that a bit dangerous for my cpu?
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Intel state that the max safe temp for that CPU is 103C.

Just keep an eye on it. End it if it creeps above 90C. It should throttle automatically anyway, to protect itself, but typically one ends it oneself if over 90C.

Remember that once you stop using Prime (or similar) you won't see anything close to 90C.
 
Ah ok, that's good to know. I'll try to OC it to 4.4 later when I'm home from work. Thanks for all the help, really appreciate it :D

Oh one more thing. I got 2x 4gb 1600 ram at the moment. Was gonna upgrade it to 16gb.
Should I buy another 2 sticks of 4gb 1600 or would it be ok to get 2 x 2400s to mix with the 1600s I've got?
Or would you completely scrap that and just buy 2x 8gb 2400s?
 
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