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Any i5-2550K users out there? If so... - Page 2

post #11 of 29
Thread Starter 
Quote:
Originally Posted by mr.derp View Post

Sounds like a really good chip. @ 4.7 I needed to adjust my PLL voltage to really fine tune things, I think I needed 1.4 core v. To even BOOT into windows past 4.7 I needed enable to PLL overvoltage, I even tried 1.54 w/o it @ 4.8 and it would not go. I guess I got the short end of the stick but I'm alright with it. I think once I add in my gpu block for my 7970 I'll take it back down to 4.7 anyways.

What does PLL actually do? Just allows you to over volt it more or something? I am not sure if I have that enabled or not. If it comes like that stock then I guess its enabled. But if you have to enable it then I don't think mine is enabled.
post #12 of 29
Directly from the: The ULTIMATE Sandy Bridge OC Guide + P67A-UD7 Performance Review
Warning: Spoiler! (Click to show)
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.

Basically for mine 1.709v is the sweet spot. If I were to leave it auto my system will become unstable after a little benching, and at 1.89 it bsod's. You can also enable PLL overvoltage I have read is useful for some people to get past a certain clock like mine which refuses to do more than 4.7ghz without it even with a ridiculous amount of vcore.
post #13 of 29
Thread Starter 
Quote:
Originally Posted by mr.derp View Post

Directly from the: The ULTIMATE Sandy Bridge OC Guide + P67A-UD7 Performance Review Warning: Spoiler! (Click to show)
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.
Basically for mine 1.709v is the sweet spot. If I were to leave it auto my system will become unstable after a little benching, and at 1.89 it bsod's. You can also enable PLL overvoltage I have read is useful for some people to get past a certain clock like mine which refuses to do more than 4.7ghz without it even with a ridiculous amount of vcore.

Wow ***lux. I thought 1.55 was the highest to put your vcore? Ur using 1.709? wow
Edited by esCob4r - 4/23/12 at 2:33pm
post #14 of 29
Quote:
Originally Posted by esCob4r View Post

Wow ***lux. I thought 1.55 was the highest to put your vcore? Ur using 1.709? wow

Think that was for pll. That's way too much for vcore
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post #15 of 29
1.4 V @ 5.2Ghz

Will get my screenshots now!
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post #16 of 29
Quote:
Originally Posted by esCob4r View Post

Wow ***lux. I thought 1.55 was the highest to put your vcore? Ur using 1.709? wow

doh.gif Referring to PLL voltage, I have it set at 1.709 whereas my vcore it 1.48
post #17 of 29
Thread Starter 
Quote:
Originally Posted by mr.derp View Post

doh.gif Referring to PLL voltage, I have it set at 1.709 whereas my vcore it 1.48

Ahhh ok I thought it was the same. Sorry I am new to overclocking let alone intel..

And I was mistaken earlier. I did set my chip up for 4.7 and even 4.9 with running IBT and Prime95. I think I had to go to 1.4 for 4.9 but I never tried going below it.
post #18 of 29
Thread Starter 
Well I just made an awesome trade for my AsRock 990FX Extreme 4 AMD Board and in return I will be receiving a full water cooling loop by XSPC. I will be receiving 2 rads, 1x120mm and 1x360mm. I will probably only use the 120MM for the time being since I have only a Haf 912 case and would need to probably mod some things to work a 360 + i do not have a GPU waterblock yet so I will only be watercooling my CPU. Will a 120MM XSPC Extreme rad be sufficient to watercool my 2550K when trying to clock it to 5.0Ghz+? Also once I receive and have it all installed and running I will report back my results from overclocking.
post #19 of 29
Quote:
Originally Posted by pranzettijon2008 View Post

1.4 V @ 5.2Ghz

Will get my screenshots now!

Where is this guy? I want to see that.
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post #20 of 29
Quote:
Originally Posted by samwiches View Post

Where is this guy? I want to see that.

Here is mine. 5 GHz Overclock - Validated. http://valid.canardpc.com/show_oc.php?id=2369548
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Project DayZ
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Trident X Catleap Q270 Ducky Shine II Brown MX / Orange LED 1000W Seasonic Platinum 
CaseOtherOtherOther
NZXT Switch 810 Mayhem's DT5Noz CPU Block Alphacool 480x86mm NexXxos Monsta Radiator Alphacool Full VPP655 Pump 
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Scythe Kaze Master Pro Fan Controller MDPC-X Sleeving Kit. (Green and Black sleeving) Custom Parts Everywhere Other - Tons of misc items. 
OtherOtherOtherOther
AKG Q701 3x7970 Swiftech Komodo GPU Blocks Customer Made FrozenQ Reservoir Hardware Labs 420 GT Stealth Radiator 
CPUMotherboardGraphicsGraphics
i5-2550k z77 mpower msi 770 lightning msi 770 lightning 
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Mushkin Radioactive 8GB (2 x 4GB) DDR3-1600 Memory Western Digital Caviar Black Western Digital VelociRaptor Samsung 830 
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LG UH12nS29 Blu-Ray Reader Alphacool NexXxoS UT60 Full Copper 360mm Alphacool NexXxoS UT60 Full Copper 240mm Alphacool NexXxoS XP³ Light - Acetal Edition - ... 
CoolingCoolingCoolingCooling
Bitspower Water Tank Z-Multi 250 - Full Clear A... Alphacool VPP655 (Laing D5) - With D5 High Flow... EK-FC680 GTX Lightning - Acetal + Nickel EK-FC680 GTX Lightning - Acetal + Nickel 
PowerCaseAudioOther
Silverstone Strider Gold Evolution 750W Silverstone TJ07 ASUS Xonar Essence STX Cougar Vortex 
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