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Overclocking an 1156 socket help.

post #1 of 2
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I have my i5 overclocked to 4.5 right now and it seems very stable. I ran prime for 8.5 hours and no errors at all. However there are some settings in the BIOS that I don't really know when to change or what they help improve....

CPU and PCH clock amplitude
CPU and PCH clock skew
IMC voltage (I know this is the integrated memory controller but when and why should I raise it?)
PCH (platform controller hub) voltage
and CPU PLL

I guess what Im asking is what all of those listed mean/control. I don't want to raise the voltages of something I don't need to, but as of now my 4.5 is pretty much just from raising the CPU voltage, and wondering if adjusting any of these settings can give my the same clock speed but more stable at possibly a lower Vcore.
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Ramona
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post #2 of 2
The Cpu/Pch clocks sometimes improve BCLK overclocking, if you don't have problems dont touch it.
IMC Voltage, maxium "safe" value according to intel is 1.4v, the higher your BCLK/Ram speed goes the more voltage it needs. I need 1.20 IMC for 200BCLK/1666Ram but 1.212v for 200BCLK/2000Ram.
PCH is the southbridge voltage, you should not need to touch it, max safe value reported that I know is 1.15v for it, and you might need to raise it with higher BCLKs.
And CPU PLL is very complicated, it's what modulates the bclk and multiplier voltage as far as I know, I won't touch it unless you are unstable. 1.8v should be the default and good one. You might need to raise it for high multiplier/bclk.
    
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CPUMotherboardGraphicsRAM
Intel i7 4770K ASUS MAXIMUS VI HERO Gigabyte G1 Gaming GTX 980 Ti G-Skill TridentX 2400 
Hard DriveOptical DriveCoolingOS
850 PRO 256GB None Corsair H100i Windows 7 Ultimate 64-bit 
MonitorMonitorKeyboardPower
PG279Q U2414H G710+ Corsair AX750 
CaseMouseMouse PadAudio
Corsair 750D SteelSeries Sensei XTRFY DT990 Pro 250Ohms 
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