So I'm in the middle of a Threadripper build right now. After convincing myself that I only wanted 32gb of memory, I went and bought this Corsair 32GB Vengeance set, which is supported by the MSI MEG Creation X399 according to their own QVL. Predictably, I now want to fill the remaining slots on my board. Assuming I purchase an identical set of Corsair ram (CMW32GX4M4C3000C15), what can I do to make it work on all 8 DIMMs at the rated speed (3000)? According to MSI's QVL report, this set of memory only has a check mark under 2 and 4 slot compatibility. This is my first Ryzen build, and getting through all the memory compatibility information and misinformation has been trying. If I get another set, will I be losing out on memory speed or will it simply not work? I'm not at all opposed to overclocking or tweaking memory settings in the BIOS, I just want to make sure that I don't drop another few hundred dollars for nothing. Here are my system specs: CPU: Ryzen Threadripper 2950X (Custom Loop Watercooled) Motherboard: MSI MEG Creation X399 RAM: Corsair Vengeance RGB Pro (CMW32GX4M4C3000C15) Video Card: Asus Strix GTX 1080 Primary Drive: Samsung 970 Evo 500GB PSU: Corsair HX1200i Thanks to anyone that can help me out.