I'll have to check the strings in my firmware.
This says VDDQ must be less than 200mV above VDD. Nothing about a negative feedback loop or a mere 20mV differential.
The negative feedback string dansi mentioned I have not seen on TUF, but I don't know which ASUS board UEFI manual PDF I was reading I saw that string, but unsure, will check and report back if find it.
Yes the help string is a contradiction.
"Note, that running VDDQ != VDD is non-standard and may cause memory stability issues."
Running VDDQ not equal to VDD is not optimal.
"Take care that during ramp down and ramp up, the VDDq-VDD voltage must be less than 200mv."
IMO poorly worded, nonsensical to me.
I do not find it anywhere in the Gene BIOS. Not in Extreme Tweaker or AMD Overclocking memory timing menus. Seems ASUS has not decided that we deserve to have it.
UEFI tab Advanced, AMD Overclocking, DDR and Infinity Fabric Frequency, dig around in there. IIRC Timings, found within DDR SPD timings
I would look but my AM5 system is running something, but look at the menu text below in red.
Setting it does not work? You have to use a hex editor to change it?
You don't use hex editor.
The setting uses hexadecimal input not decimal.
Decimal 10 input be A, 11 be B, use windows/phone calculator in programmer mode to see decimal as hexadecimal.
This is an AMD AGESA option.
Since AM4 1000 series, the AMD timings menu in AMD section of UEFI, has been hexadecimal input. That's why people don't really use it/venture in to and use the main areas of UEFI.
