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What's better? HIgher voltage (vcore) to CPU or higher LLC setting?

post #1 of 4
Thread Starter 
We all know the vcore and LLC setting affect the stability specifically of the i7 sandy bridge processors in regards to overclocking.

I was curious to know if anyone has had more success in defining or answering as to if raising the vcore or LLC setting is more suitable when achieving stability?

It seems if you are unstable, you can either raise the LLC or vcore to achieve stability and both function equally well, but I was curious as to which is more sought-after and provides the most efficient stability?
post #2 of 4
I have found with sandy bridge that its more about finding a balance among the two. I think it also depends on how far you want to overclock.

It seems to me that LLC helps stability at high clock speeds while under load but has a negative affect at high clock speeds while idling and browsing. Low load scenarios.

Theres also the concern with high LLC and extreme overclocks that the voltage has the potential to spike beyond the set voltage.

For mild overclocks I think it is better to avoid LLC or use a very low level. For high - extreme overclocks I would use a mid to high LLC (preffering mid levels if possible). The highest level of LLC should only be used for benching purposes when pushing the chip to the limit.

I like to state this in alot of my posts to avoid any debate but this is just my own opinion, from my own findings and from what I have read from others. Also, although some of these points hold true across other generations of processors, this is mainly for sandy bridge CPU's.
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Tevatron K
(15 items)
 
 
CPUMotherboardGraphicsRAM
2600K @ 4.8ghz Z77 Sabertooth R9 290 8GB Samsung 30nm @ 1866mhz 
Hard DriveHard DriveOptical DriveCooling
M500 240GB SSD 3x 3TB HDD's Sony DRU-V200S Custom water cooling 
OSMonitorKeyboardPower
Windows 7 64bit QNIX 27" 1440p @ 96Hz Ducky 1008 BeQuiet 1200w 
CaseMouseMouse Pad
HAF 932 Logitec G5 Table top 
  hide details  
Reply
post #3 of 4
Jokah pretty much hit the nail on the head.
After about 200-300 BSODs testing this, I achieved better overall results from utilizing more vcore than LLC. For me, stability was fine using either method given the proper settings, but I felt like there's more control and predictable outcome using vcore.
post #4 of 4
Depends on your vCore, remember it adds voltage to reduce Vdroop so in reality your CPU is seeing vCore + LLC voltage. On >4.6GHz I recommend Medium to High and frankly if Medium fails try upping the vCore +0.01v. Unfortunately, posting and booting are not the whole picture until the CPU is stressed with AIDA64/Prime95 or whatever CPU stressing application you use; i.e. stability.

For Benching I use a fixed vCore but for everyday I prefer an Offset with a Medium to no LLC, all of this depends on the OC and 'quality' (luck) of your CPU.
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