Seeing as HashFast is picking up the tab for the power supply, I'd say X-850 is good decision for the customers.
LOL... "picking up the tab" for the $300 worth of power supplies is a bit of a stretch when they're installed in the system users paid $5600 for.
We don't want to skimp on any aspect of our hardware, especially an absolutely critical component like the PSU.
Given the problems our competition's customers experienced with PSU compatibility, we are applying that lesson to our own approach.
That's why we've negotiated a special relationship with Sea Sonic, the premier manufacturer of PSUs for the performance enthusiast market, and have chosen to include them with our ASICs to ensure smooth, successful turnkey deployments.
Oh, I don't disagree. I'm just laughing at the idea of saying that Hashfast is picking up the tab on the power supply. It's like Ferrari saying that a new version of the 458 Spider has 20 more HP, and that's great for customers because Ferrari is picking up the tab for the engine.
HashFast likely made a good engineering choice there, but the customers are still the ones picking up the tab for it.