ok so i have my machine set up. it runs fiiine. 3990x asrock creator trx40 128gb tridentz 3200cl15 however im just starting with tuning it up and i have a few observations: first, at default, my tridentz ram with xmp profile loaded runs at the correct 3200 clock.. however the infinity fabric defaults to 1500mhz. i changed just that in bios to 1600 to be 1:1 my vray and cinebench scores went down a bit? i tried bumping ram up to 3600 and 1800 fabric, and loosened timings a bit, but it failed to boot and i had to reset bios. when it comes to ram i have no idea what im doing, and the dram calculator doesnt appear to support 128gb kits. for now ive left it at xmp/1:1 now onto ryzen master. if i turn on PBO and auto OC, my all-core clocks jump a fair bit, also power consumption. however i get random downclocking and my scores in vray are sometimes similar or worse to stock as the clocks flap around so much. i know the vrm isnt the best on this motherboard, but its still good for almost 700 amps and 1000w. its wierd, because my cpu temps never get above 60 odd degrees (i have a massive cooler) vrm is below 50 degrees, and there is current/wattage left on the table. what is ryzen master throttling for? obviously something ive not considered. note that if i limit the cpu ppt to say, 550watts, i get a solid 3.8-3.9 ghz all core and good 85,355 vray /29182 cinebench. so limiting the cpu gets me better scores. gotta find out whats causing the throttling. also wierd: single core with auto OC isnt really any better? im asking plus 200 mhz, but i still get 4.32 ghz when running cinebench single core test. obviously ive not got any power/temp limits affecting that , so why doesnt it boost higher? i also note that cinebench isnt using one of the gold star cores in ryzen master? shouldnt it always choose the best core for stuff like this? ryzen oc is a mystery to me! so i need to get help tuning my ram, i was assuming 3600 and good timings would be ok with 3200 cl15 b-die.. i chose it specifically over a much cheaper 3600 corsair 128gb kit, because timings were much tighter. any explanations or advice most appreciated.