Vidi što sam našao u FAQ-u za tvoju matičnu:
When the motherboard is installed with 4 pieces of double sided memory modules, why does the BIOS detect incorrect memory size?
According to Intel chipset specification, if you wish to install 4 pieces of memory module on this motherboard they have to be single sided.
For more information, please kindly refer to memory installation section in the user manual.
Ako pročitaš u manual-u KLIK na 16 stranici, to ti i piše (u tablici) da kod 4 modula moraju biti SS-single sided.