He mentioned previously he was going to try to squeeze a few percent more out, perhaps it wasn't possible after all..

Can you point me out the directions to get Boysies BIOS...

I've been using Corsair 1000W supplies since I first started mining. I dual mined Eth + Siacoin Decred and found the PSU pushed to the limit with 6 RX480s.

I've since stuck with mining Eth-only, but I'm building some new rigs for mining (6 RX470 4GB cards) and want to explore dual mining again. For dual mining Eth + second coin, is 1200W power supply enough?

I have tested it and it does not run stable. Sometimes it runs 30h and freeze, othertime after 2h it freezes my Windows 10. Tried with different Catalyst versions. You will see...

Sorry , for use only ETH with 2 board ? ( i have 6 gtx 1070 )

EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal address -epsw x -di 1 2 <------ ( this -di 1 2 work only 1 board )

Thanks .

Anyway to use the "ttli" when the first GPU is disabled?

Like I am running ETH mining with -di 12345

The first GPU is mining XMR. But when GPU 0 is running hot, it throttles the first GPU (di 1) with the ETH miner.

The temperatures are mapped at the start of GPU0, and not necessarily the correct GPU.

For the 7970, it is less than 10 MH/s .

I run 20 rigs, 10 rigs are Sapphire rx 470 8g, and 10 rigs are Sapphire rx 480 8g, and all rigs are run with an eVGA 1300W psu.  I am dual mining ETH/DCR and run the DCR up to maximize output without hurting my ETH production.  That tends to lend itself to 1100W of power which is right at 10.0A of current on the 480 rigs.  Since I run 2 rigs off of one 20A breaker, I run a 470 rig and a 480 rig together because the 480's pull more power but can mine at a slightly higher rate and I control to a total load of 19A to make sure my breakers don't trip due to the swings in the process and power supply from the city.  All of my cards run a Mod'd bios and I run my cards to get 28.0 Mhs on the 470's and 29.0 Mhs on the 480's.  Depending on how you run your systems, I would recommend the 1300W psu since they are not much more expensive and it gives you some room on the DCR if you are only going to run one machine per circuit.  The more DCR you mine, the more power you will consume.  Plus, it will keep you away from the ragged edge of pushing you psu out of its control power factor.  Going up to a 1600W psu doubles the price and is only relevant if you have the room to pull that kind of power on your circuits.  Hope that helps.

Good luck getting much more than 24 Mhs on those cards.  I believe the ones that claim 28-30 are full of shit.  I accidentally bought a rig with a 6 Sapphire rx 480 4g set up early in my mining days when I didn't know what I was doing and it seemed real cheap and I have screwed around with them only to finally give up and I now just mine the hell out of DCR because they are good for that.  I run the cards with DCR at 90 and get 22-24 Mhs and accept what I get.  Anything I try with them to increase ETH prodcution causes the cards to drop out or get the OpenCL failure.  I can get the 8g versions to work just fine and mine at the levels you state, but the 4g cards just don't have enough ass to get it done.  If you do figure it out, please let me know the trick, and in the meantime, good luck.