z790 issues (slow boot, can't restart stuck on code 55, and can't wake from sleep, and very low vol)

[Molality]

I ran TM5, extreme @ anta777,  and it came back with no errors.

Windows 11 Pro

i9 13900ks

g.skill 4 x32 ddr5 (kit says 6600, but I'm running at 4800)

I've updated all drivers.

I don't know what else to do, but start up times taking around 2 minutes shouldn't be happening, and I wouldn't mind so much if it can go to sleep.

When an app installs and requires a restart, the restart will jump through a lot of codes stopping on 55.

When it goes to sleep, it seems fine, but waking it up will cause the fans to spin at max rpm, after 5 min, still no display.

Sound is low, with volume control on max on the pc, and speakers, I get about decibel level of a strained whisper.

I have some computer experience, but it is limited. Any help is appreciated.

[Silent_Scone · Accepted solution]

Hello,

1)Does this behaviour occur if you reset the CMOS to complete defaults via the button on the rear I/O.?

2) Have you tried removing one of the kits and retesting?

Seems to be an influx of users combining 4x32GB DIMMs, this configuration or combining memory kits of any kind doesn't lend itself well to overclocking. Intel's specification lists 2 slots per channel boards with 2 DIMMs per channel populated as a max of 4000MT for single rank modules and 3600MT for dual rank modules respectively.

[Molality]

I opened it up and unset and set the DIMMs a few times. It works waking up now. Still a slow cold boot, but it won't bother me as much now.

[Silent_Scone]

hi,
QCODE 55 means no memory installed, so makes sense it could be a contact issue.

Enable Fastboot within the UEFI to reduce POST times.