iMac coming this week with 8GB, i7, 580, SSD. Have a pair of Kingston HyperX modules for the system, 2x16 GB. Just curious what the MacRumors take on the stock modules is like these days. Better to leave them in place and install mine around them, resulting in mismatched pairs to 40 GB with different timings (but all DDR4/2400), or take Apple's RAM out and install my own, resulting in a single matched pair to 32 GB? My feeling is the latter but unsure how much it actually matters in day-to-day (routine office use, gaming in Boot Camp) function.