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2700k core current limit?

http://www.overclockers.co.uk/showproduct.php?prodid=CP-390-IN
***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...
 
no i meant core current limit.

in cpu control it gives settings for core current limit and in the speed step section long duration and short duration in (w) watts
 
Taken from Asus P8V68-Z Manual:

CPU Current Capability
This Item provides wider total power range for overclocking. A higher value brings a wider total power range and extends the overclocking frequency range simultaneously.

Configuration options: [100%][110%][120%][130%][140%] Default is [100%]

I hope this helps! From what I can see with my motherboard, the higher you set this the more stable the OC at higher frequencies, I read on a ASUS support site that if you want to achieve extreme OC then you need to set the level to [140%].

Here is the link to the ASUSROG forum: http://www.asusrog.com/forums/showthread.php?2453-P67-Z68-BIOS-Guide-BASIC-Intermediate-Overclocking

Hope this helps
 
Just found this on:

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/3 - I hope this is ok to post?

Finally, the CPU Current Capability is the total power current available to the CPU cores. Intel purposely limits this to its own spec so the cores won't explode when someone attempts to shoot 200 amps through them. However, this also limits overclocking as the current demand increases with frequency and voltage. Increasing this factor can prevent any artificial limit of high overclocks.
 
demonstag said:
Taken from Asus P8V68-Z Manual:

CPU Current Capability
This Item provides wider total power range for overclocking. A higher value brings a wider total power range and extends the overclocking frequency range simultaneously.

Configuration options: [100%][110%][120%][130%][140%] Default is [100%]

I hope this helps! From what I can see with my motherboard, the higher you set this the more stable the OC at higher frequencies, I read on a ASUS support site that if you want to achieve extreme OC then you need to set the level to [140%].

Here is the link to the ASUSROG forum: http://www.asusrog.com/forums/showthread.php?2453-P67-Z68-BIOS-Guide-BASIC-Intermediate-Overclocking

Hope this helps
Click to expand...

demonstag said:
Just found this on:

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/3 - I hope this is ok to post?

Finally, the CPU Current Capability is the total power current available to the CPU cores. Intel purposely limits this to its own spec so the cores won't explode when someone attempts to shoot 200 amps through them. However, this also limits overclocking as the current demand increases with frequency and voltage. Increasing this factor can prevent any artificial limit of high overclocks.
Click to expand...

thankyou for your time, its an insight but asrock dont give it in % they give it in watts, defult is 150 (w)
 
A little bit more info regarding correct setting of CPU Current Limit:-

"The only things will that will require multiple changes are the vccio (VTT), PLL voltage and vcore, refer to this:

Set the whole thing to stock and start again. This time only change the RAM to XMP (STOCK) and run prime blend for a few mintues to see that your CPU is functioning properly.

Then comes the task of determining the voltage for the multiplier, but that comes after you find the correct LLC setting for your mobo. What you want to do is set the LLC to the one that is closet to what you set it to when the cpu is under load, so for example if you set 1.35v and under load it's 1.31v and that's level 3 then you may have to increase the LLC, now depending on high your mobo works it could like so: 1 being the highest LLC and 5 being the lowest and vice versa. The objective is to keep the voltage under load as controllable as possible without it letting it spike. These LLC settings will be different amongst mobo's. For Asus mobo's the Ultra high (75%) LLC seems to work best.

Then it comes to that task of finding the actual voltage for the overclock, however before we get to that, I would advise you to reduce PLL voltage to 1.7v (Scroll down or go to sandy stable club about PLL info). Then set the vcore manually to 1.25v, Leave C1E and Speedsteep enabled and run C3 and C6 on Auto if you can, if not leave them enabled. Also leave Spread spectrum enabled, if you find that it disrupts the bclk in cpu-z then just disable it.

Additional settings that you need to change from the get go, but won't need to be changed afterwards:


Can be found under advanced settings/cpu configuration:

Quote:
For Asus Mobo's
CPU Current Capability - 140%
Phase and Duty Control - Extreme
EPU Power saving - Disabled
VRM Frequency - Manual - 350

Quote:
For Asrock Mobo's
Turbo Boost Power - Manual
Short Duration Power Limit - 250
Long Duration Power Limit - 250
Core current Limit - 250

Quote:
For Biostar Mobo's
CPU Core Current max (AMP) - 150
Power Limit Value 1 & 2 - 200

Quote:
For Zotac Mobo's
Turbo Boost Power Max - 200
Turbo Boost Short Power Max - 200

Quote:
For Gigabyte Mobo's
Turbo Power Limit - 200

Quote:
For MSI Mobo's
Short Duration Power Limit- 250
Long Duration Power Limit - 250

Overvoltage is only needed when a particular multi (usually the high ones) doesn't boot into windows. With that function, you sacrifice sleep mode. You can't have overvoltage and Sleep working together, don't know why, could be BIOS related.

This should be a stepping stone to get your rig stable. With those settings you will eventually get to the point where you're stable.

Set the multi to 45 and the vcore to 1.25v and increase the vcore each time after you stress test, run a quick custom prime with these FFTs (1344 & 1792) like THIS and go back and change the vcore accordingly, bump it by one not big jumps and that goes for PLL and VCCIO (VTT) and VCORE!!!

Work your way up from there, increase multi, test with prime, if it fails up vcore, if not up the multi. Until you are satisfied with the temps and it is stable then continue upping the vcore to stabalise.


Just a note: The custom FFT's are not that consistant, making them not all that reliable, however if it works for you, then that's great. What I mean by inconsistant, is that it may pass once with the same settings but may fail the exact same run second time round. In that instance I will recommend you to run a standard blend test to find your overclock, using intervals of 15/30mins. This duration will increase when you're nearing stability. This is a lenthy process, one that takes time and patience, make sure your up to the task"

Taken from another forum
 
Last edited:
demonstag said:
Quote:
For Asrock Mobo's
Turbo Boost Power - Manual
Short Duration Power Limit - 250
Long Duration Power Limit - 250
Core current Limit - 250
Click to expand...

I'm going for a new build over Christmas and I have a Asrock Z68 Extreme7 Gen3 MB.

Would the above changes to the BIOS be advised as well.

I have a 2700k as well BTW

Thanks.
 
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