Another thing to mention is about Onda D1800 BTC motherboard, it appears there are versions with VGA connector and without, both of mine have VGA connector. The newest BIOS update for it resolves issues with Vega cards and issues when you have 6 cards but disables onboard VGA. I upgraded BIOS on mine and lost video output. It would still start and and be accessible with Teamviewer but nothing on display using onboard VGA or DVI to VGA converter from one of cards. Did not try HDMI or DP as it meant moving the whole setup, just flashed the old BIOS back blindly and onboard VGA is working again but not sure if it will take 6 discrete GPU's or if it will work well with Vega with older BIOS. Still even if it only works with 5 RX580 it seems cost effective considering it has onboard CPU and I do not need any risers, also with 5 GPU's I should be able to get away with just a single 850W PSU so that's a bonus as well.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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