Acer G41tam Rev 10 Manual Extra Quality Link

Mixing 1GB + 4GB. The G41 memory controller gets unstable. Stick to 2x2GB or 2x4GB.

For official drivers or digital documentation specific to your PC model: Download Acer Support Drivers and Manuals | Acer Hong Kong acer g41tam rev 10 manual extra quality

The board uses an (v2.61 or later typical). Unlike custom UEFI, this is a classic ROM-based BIOS. Mixing 1GB + 4GB