I have 10GB memory, and am wondering how to place it correctly.
Right now I have:
A4 - 1GB
A3 - 1GB
A2 - 2GB
A1 - 2GB
B1 - 2GB
B2 - 2GB
B3 - Empty
B4 - Empty
Is that optimal? Or should I swap A3 and A4 with A1 and A2 so the 2GB on each riser "mirrors" the 2GB on the other?

Right now I have:
A4 - 1GB
A3 - 1GB
A2 - 2GB
A1 - 2GB
B1 - 2GB
B2 - 2GB
B3 - Empty
B4 - Empty
Is that optimal? Or should I swap A3 and A4 with A1 and A2 so the 2GB on each riser "mirrors" the 2GB on the other?