Currently have a HP 600 G4 SFF computer with 1 Hynix 8GB 2666 stick in it. 
Looking to either match the existing stick or replace with 16GB+ (have 4 DIMM slots available.)

Would need to be the "standard green" or low profile RAM as the current "standard green" RAM only has a couple mm clearance so RAM with heat-spreaders wont fit.

Thanks in advance.

*Based in Wellington region.