How do I test for compatibility?
DOes that mean it may not work?It can be a bit of a lottery mixing brands of RAM so best avoided. Buying a matched kit (ie supplied as pair) is the best policy.
How do I test for compatibility?You can use any combinations you want, it's just there is no guarantee they will be compatible together.
You can do your own compatibility testing, with no guarantees.
What is stock speed?While a matched set is preferred, especially for faster/newer ram, I've found that dd3 and below work well together if the specs match exactly. But this is for stock speeds, not anything else.
That is correct.DOes that mean it may not work?
Run something like memtestHow do I test for compatibility?
The factory clocked speed==not overclockedWhat is stock speed?
How do I test for compatibility?
And this is after you read the specs on both to make sure they are the same or similar enough that they should work together in theory (like a 1333 and 1600 module should both work at 1333).Only way to test for compatibility of new RAM with existing RAM is to install it, then check that your PC boots successfully.