Request for more lower CPU PLL selections in EX58 boards' bios

[GiggaByte]

So my i7 920 like most others, has trouble with x20 multiplier just after 3.70GHz, at 4GHz its impossible to stabilize it let alone getting passed 30 seconds without a BSOD. I found that lowering CPU PLL volts down to the lowest setting in bios, 1.300v helped enormously with x20 multi, enormous as in 30 seconds then BSOD -> 10+ mins still going in Prime95, nothing else was changed in bios. Starting at around 1.500v I started noticing increase in stability and going to 1.400v and 1.300v each gave a noticeable increase, if there was 1.200v or even 1.100v that would be very helpful.

I posted a thread about it in another forum i7 920 x20 multi favors very low CPU PLL - Overclock.net - Overclocking.net

[wazza300]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

you shouldnt need to mess with cpu pll,just raise qpi volt and cpu volt

[GiggaByte]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

You are obviously not aware of how i7's react when x20 multi is used compared to x19/x21.. x20 is harder for most for an unknown reason. Iam searching for a way that counters that issue. 19x211 its stable 10 hours of Prime95 and 30 runs of LinX.

[wazza300]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

ive never had trouble @4.2ghz with 20x plus turbo

[GiggaByte]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

x20 + turbo is not x20 its x21. Try just x20 and you will see, most likely. Few do not have the issue.

[wazza300]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

x20 + turbo is not x20 its x21. Try just x20 and you will see, most likely. Few do not have the issue.

yes i know,maybe you have a bad batch chip

[Psycho101]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

The question is, are Gigabyte physically able to implement such a change.

The voltage regulator responsible for PLL may not be able to supply such a low voltage. The BIOS software can only set voltages that the actual components are able to produce. 0.1V below stock may be a reasonable ask, but any less is pushing it in terms of what the hardware can do I believe.

Only a Gigabyte tech would be able to answer 100% if voltage for the PLL can go down thatlow, and you'd have a tough job talking to one unfortunately.

[GiggaByte]

Re: Request for more lower CPU PLL selections in EX58 boards' bios

The question is, are Gigabyte physically able to implement such a change.

The voltage regulator responsible for PLL may not be able to supply such a low voltage. The BIOS software can only set voltages that the actual components are able to produce. 0.1V below stock may be a reasonable ask, but any less is pushing it in terms of what the hardware can do I believe.

Only a Gigabyte tech would be able to answer 100% if voltage for the PLL can go down thatlow, and you'd have a tough job talking to one unfortunately.

Yes, assuming the hardware is capable of using lower than 1.300v I hope they add more selections in bios.