Hi, there is a problem with the timer under XP SP3 in your modded Bios 1704 for the Asus Apex X motherboard.
You can check this with WinTimerTester_1.1, gives running clock with negativ values.
I found the same problem during mod of Bios for a gigabyte H110M-SH2 board.
With a hack direct on Bios for the FLAGs from FACP,
I force XP to use the hardware clock.
May be this error comes, because Acpi gives overlap in memory.
I used windbg with the full debug version of XP SP3 for to see,
what is going on.
Here are the results:
I am very happy, when you can tell me, how you did your nice Bios mod for the Asus Apex X board,
because you chose another way than me, I compared via Beyond Compare 2 the original 1704 Bios and
have a nice day