I replaced the original 4 gb memory card by a double 8 gb.

Before this, I checked the size limit. I found that max is 16, good:

Bios is 1.30, the last as I know, and only 8 is detected by the Bios.

I crossed the two memory slot, and still getting 8.

I left only one, still 8. Exchanged with the other 8, still 8...

Please help.