Mixing DDR brands

[Blue Scorpion]

It shouldn't cause any problems, but try and get memory with similar if not identical CAS timings 8-8-8-24 2N <- these numbers should be the same for both sets if possible as well as ECC or non ECC, also check voltages as they can differ. If you are not sure of the timings of your current dram use something like "sisoft sandra", this will allow you to check the timing's, voltage etc of your current memory.

If you cannot get identical timings, try to make sure the new stuff is faster than the old, with CAS latency, lower is better; this is because some memory controllers will default to the slower set of timings for both sets, while other dual controllers can run both sets at different timing. Adding slower memory could reduce the performance of the memory you already have installed.