RX 470 BIOS editing and modding
Hi. I've been trying to overclock my "Strix" RX 470 from ASUS but I think I've hit the power limit wall since the card throttles even if temperature is lower than 70C, I used afterburner to bump the stock limit (which seemed to be 95W) +50% (143 ∓2) but it still throttled on Superposition and certain games when trying to run at 1400MHz (stock: 1250).
It was time for a VBIOS edit which I did, although I only raised the power limit to 150W because I'm not really sure how much power I can draw using a single 6 pin connector, some say only 75W but others say up to 150W since the +12V wiring is the same for both and the 8 pin connector only differs in the amount of ground wires.
Thing is, the PCB has the two remaining holes for the connector pins available and I could swap the existing 6 pin con for an 8 pin con and call it a day BUT after some research I couldn't find a detailed diagram of the PCB so I don't know if those holes connect to the rest of the power delivery circuit or are just dummies. According to the ASUS site the 8GB version of the same card uses 8 pins so maybe they used the same PCB for both but decided to use the smaller connector for the 4GB card, I can only wonder.
PS. I've repasted the GPU, removed the plastic shroud and replaced the stock fans for 2 120mm 2800RPM turbines and temps dropped by almost 17C, max under a furmark load was 74C, while rendering, which is what I use the card for, temps are in the mid 60s
To sum up, my questions are:
How much power can I draw from a single 6 pin power cable?
Would replacing the connector on this card work?
What would be a reasonable power limit in the VBIOS for long term usage?