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Intel 2500k Overclock questions

post #1 of 3
Thread Starter 
I understand there are a large number of Sandy Bridge overclocking threads and I know I found one that contains SOME of the questions I'm about to ask but I've yet to come across it again.

PLL Overvoltage: I'm not sure what this setting does but it seems to stabilize my system, and if anyone can explain it please do.

Yesterday when I was trying to hit 4.8GHz I would get errors in Prime95 at about 1.38-1.39 Vcore, and I slowly upped it to 1.42. Although as I upped my Vcore instead of helping the issue I would simply get BSOD's. Wouldn't I go from BSOD to Errors instead, and with enough Vcore eventually go stable? Anyway, I enabled PLL Overvoltage and now I'm stable at 1.42, will it hurt anything?

Long Duration Power Limit:
Should I play with this and will it help me?

Long Duration Maintained:
" " " "

Short Duration Power Limit: " " " "

Additional Turbo Voltage: " " " "

Primary Plane Current Limit:
" " " "

Secondary Plane Current Limit: " " " "

When I do (" " " ") it means the same question as before, so please answer them all if you can.

VCCSA: I see people mention this setting but my board (Sig-Rig) does not have it, why not

I have more questions but those can be explained in most overclocking guides.
Edited by InfamousLegend - 8/21/11 at 9:43pm
post #2 of 3
"VCCPLL: Commonly known as CPUPLL, this voltage is for the internal clock generator for the CPU. Intel states maximum at 1.89v, and stock at 1.8v.

What does the PLL do, you ask? Here is how you get 3.4 GHz. A constant frequency input (BLCK) is generated by the PCH (P67), the BLCK is then multiplied by the core ratio by the internal phase lock loop (PLL) and then you have a greater resulting core frequency. CPU PLL is the PLL that gives you 3.4 GHz at stock and 5.2 GHz overclocked.
I would leave this voltage at stock, at one point I thought this voltage helped me lower Vcore, but it was just the processor playing tricks on me. In fact on X58 systems lowering the CPU PLL was thought to help lower temperatures and thus improve stability, on the other hand at very high frequencies this voltage is creased by many overclockers. I say increase it to 1.89v if you like, but don’t go north of that, if you want to save power and keep temperatures low turn it down to 1.71v."
http://www.overclock.net/intel-gener...uide-p67a.html

EDIT; all the way to 4.6~4.7 you should be fine with PLL off ,anything higher i would recommend PLL and LLC ultra high just my 2c
Edited by coolhandluke41 - 8/21/11 at 10:07pm
    
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CPUMotherboardGraphicsRAM
i7 4930K Rampage IV Gene SLI Evga GTX 780 Classy 16Gb TeamX2400c9 
Hard DriveCoolingOSMonitor
Samsung 840 Pro/ Hitachi Deskstar 1TB  H20 (NexXxoS 420+280) w7x64 VG248QE 
KeyboardPowerMouseAudio
Logitech G110 SuperNOVA 1300 G2 G502 Proteus Core Foobar2K/WASAPI >NuForce Icon HDP >Crack with S... 
  hide details  
Reply
post #3 of 3
Thread Starter 
Quote:
Originally Posted by coolhandluke41 View Post
"VCCPLL: Commonly known as CPUPLL, this voltage is for the internal clock generator for the CPU. Intel states maximum at 1.89v, and stock at 1.8v.

What does the PLL do, you ask? Here is how you get 3.4 GHz. A constant frequency input (BLCK) is generated by the PCH (P67), the BLCK is then multiplied by the core ratio by the internal phase lock loop (PLL) and then you have a greater resulting core frequency. CPU PLL is the PLL that gives you 3.4 GHz at stock and 5.2 GHz overclocked.
I would leave this voltage at stock, at one point I thought this voltage helped me lower Vcore, but it was just the processor playing tricks on me. In fact on X58 systems lowering the CPU PLL was thought to help lower temperatures and thus improve stability, on the other hand at very high frequencies this voltage is creased by many overclockers. I say increase it to 1.89v if you like, but don’t go north of that, if you want to save power and keep temperatures low turn it down to 1.71v."
http://www.overclock.net/intel-gener...uide-p67a.html

EDIT; all the way to 4.6~4.7 you should be fine with PLL off ,anything higher i would recommend PLL and LLC ultra high just my 2c
Yeah, my goal is 24/7 4.8GHz overclock, see were I'll get.
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