When I mean a VRM FAN, I mean a literal FAN attached directly to the VRM heatsinks, not in close proximity like a CPU cooler, a separate fan on the VRM only there to cool the VRM, older AMD 50-60mm sized fan's are decent enough to cool if you place them right above.
I used such a solution on my older B350 with 4+3 4C06/4C10N [1x2] parts when OC:ing my Ryzen 1700 to ~4.0Ghz. You could reach 100C+ on VRM with ease if pushing Prime95 smallFFT. You want that FAN on there. Stock there isn't a issue. OC with 140W is a issue.
And a 3950X can pull close to 200watts if pushed to the limits, but maybe normal usage is 160-180 maximum for most people... You see it's not enough. It's not designed for that high wattage/current.
3950X has a 142watt limit in stock configuration. It's barely able to manage that in passive mode I would guess, it will get hot 10+3 4C06/4C10N [1x1].
Gigabyte X570 AORUS XTREME, Ryzen 7 3800X PBO boost, 2x8GB 4866/1900 22.214.171.124.90.tRFC 680 1T 1.650V [Micron Rev.J]
4x8GB 3800/1900 126.96.36.199.66.tRFC 600 1T 1.700V Kingston HX434C19FB2K2/16 3466C19 1.2V (Micron Rev.E 19nm [D9VPP]),
2x8GB Kingston HX436C17FB3K2/16 3600C17 1.35V (Micron Rev.J 17nm),
2x8GB 3866/1933 188.8.131.52.60.tRFC 448 1T 1.590V Kingston HX436C17FB3K2/16 3600C17 1.35V (Hynix DJR 17nm)
Last edited by Nighthog; 06-22-2020 at 04:50 AM.