Acer SX2830 Service Manual page 73

If a second memory module is available, install it in the DIMM2 slot by repeating step 1.
3.
NOTE: Install memory rule as table shown below.
Chapter 3
DIMM1 DIMM3
A
A
A B
B A
A A
A B
A A
A B
Remark:A and B show different size of memory, size:A>B
DIMM2 DIMM4
A
B
A
A
A A
A B
65