Quote from: IOTUSA on January 17, 2017, 05:05:49 PM

Quote from: fr4nkthetank on January 16, 2017, 09:31:30 PM

Quote from: Swiped on January 16, 2017, 09:05:12 PM

Has anyone found a reliable bios mod for the Sapphire rx 480 8g cards that reduces power but keeps the h/s rate respectable? Most of what I have found on forums have been unstable. I have 4 rigs with 6x Sapphire 8g 480's that each run at around 1200w (and I have a 1300w psu) and 11.5A and deliver 260 H/s on each card with the stock bios and I am having to reduce their intensity each time the mining software speeds the mining up or the whole platform shuts down due to exceeding power limits. I have played with different power tools such as Watttool (Wattman is useless for multiple cards and settings in Claymore just freeze my systems) but I am a bit of an inexperienced computer user so I am not sure what to try and I don't want to damage my systems. I have read every page of this forum as I have worked through all the same issues with Open CL and cards not being recognized, and I appreciate the degree this forum supplies ideas and methods to help others work through their issues. So I am asking my first question around suggested settings in Watt tool or perhaps even a stable and capable bios mod that keeps power down while not giving up on the current performance, if possible. Any help is appreciated.

why not just download MSI afterburner, and bring voltage down to about -75mv to start off, see if its stable. 1200w is too much ! By undervolting you'll get a lot of power savings.

Is there a 'chart' somewhere for undervolting? I have a mix of 390/290/290x/380/280 etc. and would love to find a way to undervolt them to save power but don't really want to do it 'card by card'.

Or am I better off just using Wattman to drop the power 'safely' to wherever each rig will run without crashing?

What speeds are you getting off of your 380 cards? I'm only getting about 160H/s on mine and trying to figure out if that is normal. Seems low.