Gigabyte GA-P67A-UD5 Discussion Thread

[Falkentyne]

just wanted to share that undervolting CPUPLL lowered my required voltage significantly .. i have no idea why but i needed about 0.06v less to get 5.0ghz stable...

this is 1.34v in bios and load at about 1.39v with LLC lvl 1 on

How exactly did you undervolt the PLL? Did you have overvolt PLL enabled? Or did you disable that AND also set the PLL voltage in the settings at the same time? (no sensor for pll...)

[scccm]

How exactly did you undervolt the PLL? Did you have overvolt PLL enabled? Or did you disable that AND also set the PLL voltage in the settings at the same time? (no sensor for pll...)

yep overvolt pll enabled and cpupll voltage set to 1.76v

[Falkentyne]

I wonder what pll voltage your chip was getting by doing that....im going to take a guess that "Auto" sets it at 1.80, and Overvoltage sets it at 1.90, so 1.76+overvoltage=1.86? ...would be nice if there were a sensor....

[scccm]

i lowered the cpupll a few notches more and found stability at even lower voltage .. but 1.7v caused a no post(and auto bios flash) for me

seems a little too good to be true. i needed 1.45v for a stable run at 5.0ghz now i only need 1.38v

I wonder what pll voltage your chip was getting by doing that....im going to take a guess that "Auto" sets it at 1.80, and Overvoltage sets it at 1.90, so 1.76+overvoltage=1.86? ...would be nice if there were a sensor....

ill try it disabled cpupll overvolt and manually set it to 1.86 . see if i get the same results

[C-N]

Here ya go C-N. They can run even faster yet at stock voltage but I just picked 1086 for a quick test for ya.

Thanks buddy, that is real nice only problem is I think I have to go buy some!!!!££££££

The only difference from C-N's BIOS script was that my memories were set as an EXPERT on the timings part so i had to go and set both channels equally. Now i have set it to QUICK and it passed 2 reboots with no problems. I truly hope this is the issue.

My specs are:

2600K - L040B208
Megahalems Rev.B + Scythe S-Flex 1600rpm
G.Skill Pi series 2133mhz 7-10-7-27 @ 1.65v
MSI GeForce GTX 480
Gigabyte P67A-UD5
Win 7 ultimate x64 w/o SP1
Silverstone Olympia OP750

BIOS F6A - main and back up are F6A.

here is the thread for the ASUS cold boot bug. - Thread


Update: Passed a 3rd tougher cold boot which had the machine sitting for 10 minutes powered off. Man i think this is it. Well see if it will fire up properly when i get back from work in 8 hours - im excited now !

Fingers crossed it holds

UD5 users,try this:

CPU-Z 1.56.3 Beta

http://www.fileden.com/files/2010/4/.../cpuz_1563.zip

Working

[dinos22]

hey flesh killer OC dude wow

hey CN so you dont need to use PLL overvoltage for 5GHz? i assume you enable it for higher clocks

[C-N]

hey flesh killer OC dude wow

hey CN so you dont need to use PLL overvoltage for 5GHz? i assume you enable it for higher clocks

I only need it auto/enabled to run the multi's that wont boot.... it appears to make no stability difference for me. I havent 100% tested but I think I need it to boot x53 upward.

[Falkentyne]

i lowered the cpupll a few notches more and found stability at even lower voltage .. but 1.7v caused a no post(and auto bios flash) for me

seems a little too good to be true. i needed 1.45v for a stable run at 5.0ghz now i only need 1.38v



ill try it disabled cpupll overvolt and manually set it to 1.86 . see if i get the same results

How'd it go?

[TurboDiv]

Same thing with F6d... When i shut down the mobo it double boots, when it double boots than everything is at defaults. Even when i loaded Optimized Defaults, the mobo double boots ?! I also updated the secondary BIOS chip to F6d and it still double boots... Why is it shutting off by itself even with optimized defaults after i cold boot it ?

[Falkentyne]

Same thing with F6d... When i shut down the mobo it double boots, when it double boots than everything is at defaults. Even when i loaded Optimized Defaults, the mobo double boots ?! I also updated the secondary BIOS chip to F6d and it still double boots... Why is it shutting off by itself even with optimized defaults after i cold boot it ?

have you tried clearing cmos button (with the power supply plug unplugged/psu rocker switch turned off?), then resetting all of your settings back to what you usually use?

Does this help the cold boot problem?