Originally Posted by ronnin426850
ASUS is split, core draws from 6pin only, vram draws from pci-e only.
Um... My ASUS and XFS cards are reference rx480. It's split between the 6pin and the slot Like all reference cards. Otherwise the symptoms wouldn't change when I go FFF000 rather than 000000 or DDD000 on the power split. The symptoms are better shifted to the pci express, fff000, than on the motherboard 000000. That's why I'm replacing the motherboard. (Also because I already swapped the powersupply.) I have not yet tested the problem in another motherboard. I could put the XFS card in the system upstairs and see what it does there I guess. Since either card operates at the correct voltage if they are the 2nd card in the system, I'd think that it's not the cards. I'm assuming that whatever burned on my motherboard 3 or 4 months ago when I overclocked my reference Sapphire rx480 to 1470 and ran 3dmark power virus on a loop is causing the issue, but I don't know. I'll put the xfs card in the system upstairs and see. It's an older system with a core 2 quad. Not really for gaming anymore, it's just for light office work, browsing and casual gaming. It's also possible that I've already done permanent damage to both cards. I hope not.
As for the VRM cooling-- I'm on a full cover water block on the ASUS card. For now, I'm on a reference cooler on the XFS card. The symptoms are much better on the water cooled card than on the XFS card. I run 10to 15mv higher than what I set on the ASUS card installed as first or if I run it by itself. I run up to 50mv higher on the XFS card if it by itself or first. Spikes go to about the same level but happen more often on the XFS card. This could be because the ASUS card has it's VRMs cooled to the 30s to maybe low 40s under high load, while the air cooled card goes to about 87 or 90.
I should say that even if I fold only on the 2nd card and leave the 1st card inactive, the 2nd card holds it's voltage better no mater which card is first or 2nd. Spikes are fewer and farther between and the cards run at the set voltage as the 2nd card.
I'm going to put the Sapphire Nitro card with it's 8pin first and have the XFS cards and ASUS cards next on the new board. Just in case. The Nitro, I think puts most of the phases on the 8pin.
My killowatt says shows my line voltage varying from 115 to 122. Not spikes, just a slow shift up and down. That's relatively normal, but 122 seems a bit on the high side. I live in a rural area and the electric co-op runs the transformer a little hot due to long cable runs to the houses. The outlet upstairs runs a little lower voltage than the one in my downstairs office. It'll be interesting to see if the XFS card does the same thing up there.