Cant boot OC

[Damien19721508]

I bought a new Gigabyte Z390 pro for my 8700k, previously I had a Asrock killer sli Z370 and had my cpu at 4.9 with 1.27v all cores, but since I swapped over to this board I cant seem to set the overclock back to what it was and infact no matter what I set my cpu ratio to and the voltage, It wont boot, I get BSOD even with 4.7 at 1.36v but If I set the board to auto on VCore it boots at any speed I've tried even up to 5.0ghz and CPU Z reports that at 5.0 Ghz it uses anywhere between 1.23-1.34v but if I try manually set the Vcore in the BIOS it wont boot, does anyone know what might be causing this?

[Jurrunio]

You forgot to wet up loadline calibration? Or maybe you're reading VID and not the actual.voltage reading(s)

[Damien19721508]

8 hours ago, Jurrunio said:

You forgot to wet up loadline calibration? Or maybe you're reading VID and not the actual.voltage reading(s)

but would I need load line if I'm already over volting the CPU (my understanding for load line is it just overvolts to compensate for Vdroop) like I said when its set to Auto the Vcore according to CPUZ uses between 1.23-1.36 with 5.0ghz all core OC, but even if I set it to 1.38v on Vcore and set my CPU to run at 4.7Ghz all core it wont boot even with voltages set for higher than what the 5Ghz OC needed, it wont boot just BSOD, but if Vcore is set to auto I can boot at any speed and seem stable I used my pc for 24 hours on auto and monitored the voltages through gaming and at idle and things to see what it was reporting so that I could use that to set my manual overclock but then using the same amount as the board was reporting back to me it wont boot but if set to auto then it works fine, I'm wondering if something is faulty on this new board or if it could be a bios issue or if I have over looked some small setting like load line calibration, but I never increased the LLC as I figured I was already overvolting the cpu. 

[Jurrunio]

2 minutes ago, Damien19721508 said:

but would I need load line if I'm already over volting the CPU (my understanding for load line is it just overvolts to compensate for Vdroop) like I said when its set to

of course you need loadline, not for overvolting but for using manual voltage regardless of voltage target, high or low.

[Damien19721508]

2 minutes ago, Jurrunio said:

of course you need loadline, not for overvolting but for using manual voltage regardless of voltage target, high or low.

okay so if I wanna hit 4.9Ghz on all core and in the past I used to have that with no LLC on my old Mobo, I had 4.9Ghz at 1.27Vcore so if I wanna try get back to that would I wanna increase the LLC or set a negative amount, so I set Vcore to 1.27 and then set LLC higher or lower? sorry I'm probably asking stupid questions but I dont know these settings too well as in the past I never had to mess with them.

[Jurrunio]

1 hour ago, Damien19721508 said:

okay so if I wanna hit 4.9Ghz on all core and in the past I used to have that with no LLC on my old Mobo, I had 4.9Ghz at 1.27Vcore so if I wanna try get back to that would I wanna increase the LLC or set a negative amount, so I set Vcore to 1.27 and then set LLC higher or lower? sorry I'm probably asking stupid questions but I dont know these settings too well as in the past I never had to mess with them.

Higher is the only way, at stock it runs minimum LLC so you cant go lower even if you want to

[Damien19721508]

9 hours ago, Jurrunio said:

Higher is the only way, at stock it runs minimum LLC so you cant go lower even if you want to

but why would I need to use LLC then if its to give more voltage, If I'm already over volting as LLC is so you don't have to over volt it, I just don't get why the manual OC voltage setting causes the system not to boot.

[Jurrunio]

3 hours ago, Damien19721508 said:

but why would I need to use LLC then if its to give more voltage, If I'm already over volting as LLC is so you don't have to over volt it, I just don't get why the manual OC voltage setting causes the system not to boot.

without LLC, typing 1.4V in the BIOS may give you 1.35-1.38V in Windows idling, and only 1.15V under stress test. What you type in the BIOS is not a constant value, and LLC helps maintain that (which btw is not the intended behavior of raising voltage, so even with LLC you should let voltage drop a bit under load, say 1.4V --> 1.35V)

[Damien19721508]

8 hours ago, Jurrunio said:

without LLC, typing 1.4V in the BIOS may give you 1.35-1.38V in Windows idling, and only 1.15V under stress test. What you type in the BIOS is not a constant value, and LLC helps maintain that (which btw is not the intended behavior of raising voltage, so even with LLC you should let voltage drop a bit under load, say 1.4V --> 1.35V)

hmmmm okay well I guess I can try it and report back as to whether it helps I will try my old voltage settings with some added LLC and hope it boots x-x