Haswell overclocking question

Trying to push my 4670k to 4.4ghz, but when looking at voltages to adjust I can't seem to pin down one of them. See below for the information I've gathered.

"Set Fixed CPU Vcore to 1.25 -1.30v
Set CPU Cache Voltage also could be called Ring Bus voltage to 1.20v -1.25vv
Set Vrin also called "CPU Input Voltage" To 1.9v - 2.1v"


My motherboard does not appear to have a Vrin setting, however there is a Vccin setting, are these the same? If it is, when I get to 1.9v the number turns red, is this normal? This makes me quite nervous.

If this is not the same, what setting am I looked at? Below you will see the first two settings that I believe match the first two settings to change.




MSI Z87-G45
i5-4670k (Corsair H115i cooler)
DDR3 Vengence PC3 12800



Any help is greatly appreciated.

yes its warning that the voltage is higher than it recommends. 1.9v should not be a prob as long as you have airflow over the mobo/vrm. the 4790k I have here didn't need anything other than vcore at 1.28 to hit 4.6G, everything else I left at auto. so you might not even need to up that vccin.

Yes, they are the same. A rule of thumb is to keep VCCIN between . 0.45v to 0.50v above your maximum core voltage.

Awesome thanks, and it was the Ring bus voltage going red @ 1.20v

Tried leaving the other two at adaptive and just adjusting vcore to see if I can get it to boot.

I'd just leave the ring at auto and set the vccin to 1.80-.190 CPU offset mode of +.050 Should boot 4.4 easy on that. Can always go higher on CPU vcore if it is struggling.

Furious_Styles said:

I'd just leave the ring at auto and set the vccin to 1.80-.190 CPU offset mode of +.050 Should boot 4.4 easy on that. Can always go higher on CPU vcore if it is struggling.

Click to expand...

This did the trick, I was having stability issues but now I seem to be stable.

Thanks everyone for the help.