I have a small batch of Ant S5's that are misbehaving!

These 4 machines are hashing along happily, and then their combined rate slips down ~125 GH/s after 20-30 days (I haven't actually logged it, but contemplating starting), where they stay stable until they are rebooted, then they promptly go back up to full rate. 

Has anyone else seen anything like this?  Am completely open to any ideas as this is kind of baffling.

Thanks!

Can confirm that slowdown happens on: Dell 750w PSUs and IBM Bladecenter 2880w PSUs, so it is more of a hardware issue.

Are you guys sure its not just the uptime/total hash division issue bug caused by having a uptime of weeks? As in, on the pool side the hashrate drop too?
Personally i have MMMonitor set to reboot once a week so i never encountered this issue, and also i'm using purely EVGA g2's.

Not sure what are your setups but you could all have a look at;
https://bt.irlbtc.com/view/596178.0

Sound like it might bandaid your problem.

Some S5's are better then others it seems to be a personality almost on the miners.   My regular S5 went a long time without doing it (Weeks if not a month) and did it twice in past week, seems to be in their nature.

I think I have a RM1000 powering just that S5 so it's not a power issue.

It is supposed to blink slowly when it is flashing/booting. Once it's mining it is supposed to stop blinking. How far are you in the process?

Personally i assumed and am talking about the main red led next to the reset switch and the Ethernet port. It blink slowly while the unit is booting and also blink and potentially beep when the miner lose connection for about 1-2 minutes~

yup it happen to me too when i upgrade to new firmware. not all my s5, just some.
still hashing but the red light is blinking.
my solution? downgrade your firmware, the red ones will be normal again.

But in the same spirit, its not happening to me, so it sound weird, and i also manually updated to the fan control version. Maybe its a board version thing? Mine is v1.91.

Thanks for your input. If everyone else with this problem share this information, maybe we'll be able to figure it out, but anyways, if its not beeping then i guess its not really a problem?

How much you paid for BBB with shipping ?