Bitcoin Forum

Looking for A870U3 owners.
I have two boards, set the BIOS to switch the PC on after a power failure. This way I wouldn't need to manually turn the PC on after a electric outage. Both boards didn't work after many tries.
Does yours work? What setting did you use?

nope here, mine needs a delay of at least 2 sec between a power down and a power up.
So if if power off the power supply switch and immediately power it on, no it won't boot up. but if i wait 2 secs or more it does respond. Quite silly I must say, esp. for brownout situations.

Same here.  Mine seems more like 15 seconds.  If I kill the power and count, "One-thousand one, one-thousand two," until I get to ten, hit the power, it will not turn back on.  I need a good solid 15 before it will kick in.

i hate to have to manually turn it on whenever power flicks off for like 1/100th of a sec.

Jesus H Christ, that's what you're getting when buying Biostar?

I can think of Mc-Gyvering a solution based on a few basic electronic components.
A 220V relay will trip on power loss triggering the clock signal generator. An IC waits 15 seconds during which time the said relay is cut off from external power. After 15 seconds, the relay is released.
For reliability's sake I'd actually use two relays in parallel so that if one of them acts up your mining rig isn't rebooted.
Does anyone have the motivation to actually build such a doohickey?

i was thinking about this
http://cablesaurus.com/index.php?main_page=product_info&cPath=15&products_id=43&zenid=d4is8uqptar3lu4p2eqisiqu83

If we know what signal it sends, we can hook that up to a hub/router, and send the power on signal to the PC, instead of having someone pushing the buttom on the other end.

I have all the necessary parts, I can build one just like it. Combined with a hacked, dd-wrt enabled router...
I might work something out over the Weekend  :)

WOW! really! Getting excited.
I have messed with dd-wrt, but I don't have too much coding skills in it.

That power button extender you linked to simply allows one to use any network cable for trivially extending the power button.
I'm thinking of using the router's GPIO to achieve the same goal. That would require user ssh login to the router and running a script.
I'm gonna have to disable my SD-card mod as well (the SD card uses the GPIO lines for data transfers).

No promises and don't hold your breath. My rigs are built using Gigabyte mobos so this will be a low-priority task.

An expensive inexpensive APC unit with voltage regulation and few hour battery will save you all those brownout headaches....


edit..

My UPSs fall flat on their face when asked to support my mining rigs. Only my network infrastructure and work stations are protected.
Anything capable of sustaining a 800 Watt miner is going to be ridiculously expensive.
Fortunately, none of my machines has that Biostar bug.

ahh, good catch. I've got $150~ one that I can play EVE on for about 3 hours after power loss. You're right it would likely not hold up well with 4 mining cards suckin the life out of it though.

I have saved my PC many times over with this thing (thunderstorms,brownouts,etc...),I use 740 watts when mining & have had no probs in 8 months.

http://www.walmart.com/ip/CyberPower-1500VA-900W-Intelligent-LCD-Battery-Backup-UPS/10250450

Of course. That UPS is rated 900W, your PC is 740W. How long can it last? 5 minutes?

I only intend for it to "smooth" out the "burps" from the power company & from the many thunderstorms we have here in Fla.

The software says 4 minutes at 740 watts,its not intended to run my rig for any longer.If I wanted to run on backup for say 2-4 hrs then I would have to invest a bank of batteries that would cost around $750 or more.

Is there no way of the UPS to notify the PC of a power failure and shutdown the miners until the power returns?

It can auto shutdown the PC, but I am not sure about turning it back on.
Problem here is, the UPS would still have some power, thus the PC power supply will think that the power never went off. This means the BIOS didn't know there was a power outage.

It depends on your UPS. APC for example, has software that will kill specified applications on power failure.
http://www.apc.com/tools/download/index.cfm

There you go... 800W down to 100W while the power's out. That could last a while.