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Hi guys! Thanks for the thread, I enjoy reading it every day

I've just bought 2x Delta's 2400W with 2x PICO adapters so I can connect the PSU's to my MB's, but both MB's won't start when I press the power on switch. It just spins for 2-3 sec the CPU fan and that's all. I see the PICO has a 4 pin connector for CPU and motherboard has a 8 pin connector... but on parallel miner site says that should work. Both MB are Biostar TB250-BTC Pro v6.0, so I'm thinking I've miss something.

PICO adapters: http://www.parallelminer.com/product/160watt-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-bypass-your-atx-power-supply-entirely/#close

MB: https://www.amazon.com/Biostar-Motherboard-TB250-BTC-PRO-Supports/dp/B0736PV196

Any advice is appreciated! Thanks.

My MB's need 8 pin with the Delta, get one of these to rule that out: https://www.ebay.com/p/4-to-8-Pin-EPS-12v-ATX-Motherboard-Power-Supply-Adapter-Converter-Cable/1000233766

Thanks for the help. I will try also with a 8 pin adapter, I think this could be the issue.

That's not the issue. I have the same mobo and PSU and mine work ok with just a 4-pin.

Strange problem...not sure why yours won't work.

check the pcie cables

https://bitcointalk.org/index.php?topic=2215578.0

this could be the issue

Thanks, checked, cables seems to be ok.
Just tried to boot with a normal ATX PSU and it's not booting.... I'm trying now the second MB with an ATX PSU to see if it the same issue.