Mixing DDR brands

[kimosabi]

You want same speed, same latencies and same voltage. The first two are less important than voltage, because your motherboard usually sets them to the lowest spec'd pair anyway. You can set the sticks up in your BIOS to match eachother but if one higher binned set needs 2.0V, and you pair them with a set that needs 1.8V, some serious testing needs to be done with both sets individually before you run both. You need to know that all sticks will run ok with the lowest voltage. Or highest. You also need to know the recommended voltage range(max/min) of each set.

Say that you run the 2.0V sticks at 1.8V, then it's not 100% guaranteed that they will run ok. Performance loss is the result.