Unlike the H67 or Z68 chipsets, the H61 architecture supports only a single DIMM channel per bank.
Many used boards ship with a BIOS older than version P11.A2 . Older BIOS revisions will not POST with an Ivy Bridge CPU. You need a Sandy Bridge CPU first to update the BIOS. Acer never released public BIOS downloads, but service center images exist (Version P11.A4 is the final). acer h61h2ad manual top
1x CLR_CMOS jumper, 1x Speaker header, and 1x Serial (COM) port header. Resources for Manuals & Drivers Unlike the H67 or Z68 chipsets, the H61