I just want to thank everyone for being so helpful in this thread. Special thanks to Hellae for his reddit guide and Oldcomer's hardware for his YouTube guide. Just set up my two rigs today running 8 Vega 64s. I am at a combined 15300-15600 hashrate (pool just shows random numbers but calculated total hashes over 7 hours turn out around these numbers).
Running fine for 7 hours. Each system is consuming around 700watts from the wall, one has a killawatt and the other the Corsair RM1000i with Corsair link showing 700W and 93% efficiency on 230v. Hashrate seems a tad low but I had to leave shortly after putting them to work so I had no time to tinker.
One has a running monitor plugged in but I started the second one through TeamViewer (had disconnected the monitor while off) and seems to be running as well as the one with the monitor, maybe HDMI dummies aren't required after all!. I still ordered two and I am waiting for them. Both have onboard gpus as primary. I got two i3-4170s just because I might use them for other projects in the future (AES-NI support). 1000watt PSUS seem just fine so my advice is buy them if they are cheap instead of 1300+.
Have fun, I am!
would love to know how you are managing to run 8 Vegas on 1 x PSU. an only 1 Corsair RM1000 even.. Most of my rigs with 7/8 Vegas 56 are suffering from PSU issues and I have to power them with 2 x 1200/1000 or 1200/1600 etc etc.
sure you can tweak the cards to lower voltage but i think the initial bump at the start makes them a tad bit unstable.
Cheers
That is two rigs, 4 Vegas each, I meant 8 in total, one with a Corsair RM1000i and the other one with a Corsair RM1000x. Sorry for my bad grammar. I regret not buying two 1000is because you can monitor them through TeamViewer with Corsair link. That is important for me because if softpowerplay doesn't work, 1000watts is not enough for 4 Vegas running at the higher power consumptions. My rigs are 60 miles away from my home due to lower electricity costs and lack of space. It is 700W from the wall with a 93% efficiency which means about 650 watts coming out of the PSU. It is not as efficienct as it can be at the moment (about 1950 H/s for each card) but I had to leave yesterday and had no time to play around.