Im using 4 + 4, but diff brand. How do I noe if dual channel is enabled? I see the the ram section in speccy reads 8gb blah..blah.. Dual channel...something. Do diff brands matter?
1) A quick look at the memory section in CPU-Z/HWInfo will be enough to tell you if your RAMs are running in dual-channel.
2) Actually, think as long as these conditions are met, can try to run in dual channel mode with a reasonable chance of success:
-same RAM frequency and timings
-same capacity
-same RAM NAND (the black chips that you see on a stick of RAM) chip manufacturer
A bit tricky to meet these conditions with RAM sticks of different brands (especially the third one), using the same brand will significantly increase the chance of meeting these conditions.