2600K limits?

snowdog

snowdog

snowdog

Soldato
Joined
27 Oct 2005
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Netherlands
Hello,


Just curious, I'm trying to see if my 2600k can be pushed further, I usually run 4500mhz and with everything on stock.

I tried 4.7 ghz, which went fine with all stock settings, however my cpu got 84C on 100% load which is a tad toasty. The bios volts it to much, it was 1.38 under load and 1.3 idle in bios (1.08v in OS with speedstep and such)

1.38 is a tad high, howver I don't know which settings adjusst this, I tried manually setting volts at 1.35 and load lien calibration on ''medium'' instead of ''auto''. This resulted in a 1.35V idle cpu voltage, and no idea what under full load as it'd bsod when booting windows.

What is the stock ''load line calibration'' setting? I want my cpu to be 1.35V max under full load... What LLC setting do I need to use?


Also, do you reckon it is safe running a cpu at 80 C full loads, above 80 I'd rather not go, at 4.5 ghz I'd have 78C full load on a hot day (been running that clocks for over a year now I think no problem), now running 4.6 ( with cpu volts on offset mode+ auto and LLC left on auto), which seems to be 80 max with a spike or 2 to 82 C during a cpu&fpu test.

Some people say 70 max, which seems a bit low, seeing the TJ max is 100... General rule of thumb was 20C udner TJmax, so you reckon 80 with an occasional spike to 82 is ok ?
 
84c is fine in stress testing,gaming around 60c

what motherboard? you'll have to play around with llc levels as they all add a touch more vcore depending on the level,as will offset so you need to balance them out to get close to 1.35v at load

offset on auto is no good,it will overvolt more that a manual setting

for 4.5ghz try high llc and +0.030 offset,then stress cpu and see what load cpu v is
 
1.38v is fine (see below from the OCUK product page) 84c max core temp at 100% load is also fine as you are unlikely to ever run at 100% on a 2600 for any sustained length of time, your normal load temperatures will be much less. Though obviously your cooling will need looking at if you should want to put any more voltage through the chip as it looks like it's only just coping with 1.38v at 4.7GHz.

You say you want to be able to have a stable 4.7GHz at 1.35 but unfortunately this is down to what your chip needs to run at this speed, my 2700k needs 1.424v for 100% load at 4.7GHz so if you can get away with 1.38v I'd say you have a good chip that could possibly go higher with better cooling.

wazza's advice is good and is pretty much what I use only I have an offset of 0.035 with very high llc but my chip needs the extra voltage.

***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
 
PieEater said:
1.38v is fine (see below from the OCUK product page) 84c max core temp at 100% load is also fine as you are unlikely to ever run at 100% on a 2600 for any sustained length of time, your normal load temperatures will be much less. Though obviously your cooling will need looking at if you should want to put any more voltage through the chip as it looks like it's only just coping with 1.38v at 4.7GHz.

You say you want to be able to have a stable 4.7GHz at 1.35 but unfortunately this is down to what your chip needs to run at this speed, my 2700k needs 1.424v for 100% load at 4.7GHz so if you can get away with 1.38v I'd say you have a good chip that could possibly go higher with better cooling.

wazza's advice is good and is pretty much what I use only I have an offset of 0.035 with very high llc but my chip needs the extra voltage.

***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
Click to expand...

That info was from the early days. They admitted somewhere that it's wrong. No idea why they didn't delete that post.

You can overclock with BCLK
You can use memory higher than 1.5v

When I had a sandy chip I ran it for over a year at 1.41 for 5ghz
 
What about the temp requirements, I've been running 70+ c under load for more than a year now I think.

By the way, I'm now running 4.6, still with vcore and llc on auto, as I got impatient with faffing about manually with the volt settings, whenever I manually changed the vcore and LLC, my oc would become unstable, on auto it's stable. So far so good, stable, though 75C under load, and 83-84C under cpu&fpu stress testing.

An yeah, the BCLK thing is nonsense, while I haven't played about with it on my own pc, I have done so on sandy's with a locked multi. Also, I used to run ram at 1.65V as that's what it needed before I switched to a different RAM kit (used to use my old s1366 kit, 3x4, now on 4x8 1.35v...).
 
Last edited:
koooowweeee said:
That info was from the early days. They admitted somewhere that it's wrong. No idea why they didn't delete that post
Click to expand...
It wasn't a post, that information was on the OCUK product pages for the Sandy Bridge chips. It remained on the product pages whilst they were still selling the chips. I'm not sure where you got the idea that they changed this advice but I don't believe this to be the case, perhaps you can find some evidence?

https://www.overclockers.co.uk/inte...ocket-lga1155-processor-retail-cp-360-in.html
 
Last edited:
snowdog said:
By the way, I'm now running 4.6, still with vcore and llc on auto, as I got impatient with faffing about manually with the volt settings, whenever I manually changed the vcore and LLC, my oc would become unstable, on auto it's stable. So far so good, stable, though 75C under load, and 83-84C under cpu&fpu stress testing.
Click to expand...

You're not going to get the best results using auto settings, auto vcore is notorious for overvolting resulting in higher than necessary temperatures. If you can't be bothered to 'faff' around with manual settings then I'd suggest you don't push your overclock any further as your temperatures are right on the limits. If you used an offset voltage and a medium to high llc to achieve stability under load as previously advised you'd most likely get your temperatures under control and be able to run at a higher clock.
 
5GHz with 1.38v, LLC on high, disabled C states, a little more memory controller voltage, and some other tweaks here. :)
 
PieEater said:
It wasn't a post, that information was on the OCUK product pages for the Sandy Bridge chips. It remained on the product pages whilst they were still selling the chips. I'm not sure where you got the idea that they changed this advice but I don't believe this to be the case, perhaps you can find some evidence?

https://www.overclockers.co.uk/inte...ocket-lga1155-processor-retail-cp-360-in.html
Click to expand...

What evidence do you need? 1000s of people used 1.65v memory and same with using the BCLK for over clocking. Grantened you could only bump it slightly but it can still be done and was fine.
 
had my 2700k @ 5ghz 1.38v L3 LLC cpu_pll 1.75v was fine but dont need it 24/7 that high 4.7/8 is good enough
 
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