Originally Posted by Tobiman
Just got a Powercolor RX 480 4 GB Red Dragon with the single fan. It has a 5% power-limit which threw me off a bit but after doing some research, it seems to be due to powercolor cheaping out on vrm/mosfets etc...
What surprised me though is that I had to reduce my core voltage to achieve higher clocks. Watercooling might have also helped here with max 44C at 1350mhz. Obviously, this indicates that there's a hard power limit but i'm really happy with a -36mv 1350/2000 core/mem respectively OC. I was hoping for 1450 but I guess I'd have to get an XFX GTR to hit those clocks. My chip has 8gb ram module but flashing the unlocked power color BIOS bricked my card and I had to flash it back. Little hairy moment but given my experience with such a situation, I knew how to get around it.
weird mine (red dragon single 6pin 4gb) limit exceeds +5, but it's probably just saying i can go higher yet capping itself at 5
single 6 pin means it only get 75w+75w, hwinfo tells me it's sucking 190w, which is nearly 25w overdraw from motherboard and the single 6pin.. i probably shouldn't keep it at these speeds lol
i found the undervolting to overclock to be hilarious and true for me as well. but it was really just the stock fan curve that was causing it to throttle even at stock. with custom fan speeds i can get to 1400core 2145 mem @ 1.175v, although sometimes it drops to 1.150 which causes crashing, idk how to prevent it from doing so as both the vrms and core clock stay around 70C with my custom fan curve, but it really is only an issue on windows 10 which i hardly ever use anyway so i don't bother trying to remedy it and stick to my -42v 1320/2145 1.050vsettings.
windows 7 doesn't have this issue though. oddly enough. going to test +5 power limit at max OC, see if i crash
here's an early screenshot before i finished figuring out how hard i could push the gpu and keep it stableEdited by ocyt - 3/26/17 at 1:35am