So I wanted to upgrade an older system which has 2X2 GB ram(4 gb, the sticks are from different manufacturers). Here is my question. Since my motherboard only has 2 slots would it be better to replace one stick with an 8 GB one ( so 10 GB in total) or buy an 2x4 GB kit . Will the dual channel from the kit be more worth it than the extra 2 GB ? The CPU is an i3 3240 with an H61M motherboard.Thanks for responding !