My BFL SC Single 60 went out in a puff of smoke - what next?

[shmadz]

Incredible thread, thank you lightfoot for your insight and a question if I may.

Little singles out in the open with a big fan blowing at them should be fine, right?

my temps are also reporting around 70 degrees (which happens to be the ideal temp for my jupiter, so I thought those temps were ok.

ambient is 90 f   poor AC is going full bore just to keep the room at that temp.

The thing is, when I finally got these little singles, I took one look and stripped the cases and threw them and the power supplies away. they didn't even include a fan for the heat sink! one fan only and that is the intake fan, which is terribly constricted by that ridiculous face plate and I thought "I can do better"

So I stripped them down, set the intake fan on top of the heat sink blowing down, and that blower fan blowing across them.



And a question for the OP please. How long was it running before it blew?

[lightfoot]

Incredible thread, thank you lightfoot for your insight and a question if I may.

Little singles out in the open with a big fan blowing at them should be fine, right?

That could work. I haven't played with the LS yet, but I would say the key is to get a fan on top of the heat sink and one blowing from the side over those FET heatsinks. Running even a little vornado on mine is keeping things cool.

The thing is, when I finally got these little singles, I took one look and stripped the cases and threw them and the power supplies away. they didn't even include a fan for the heat sink! one fan only and that is the intake fan, which is terribly constricted by that ridiculous face plate and I thought "I can do better"

There's only one fan? Blah, I thought there would be two. Ok.

C

[peterepeat]

Incredible thread, thank you lightfoot for your insight and a question if I may.

Little singles out in the open with a big fan blowing at them should be fine, right?

my temps are also reporting around 70 degrees (which happens to be the ideal temp for my jupiter, so I thought those temps were ok.

ambient is 90 f   poor AC is going full bore just to keep the room at that temp.

The thing is, when I finally got these little singles, I took one look and stripped the cases and threw them and the power supplies away. they didn't even include a fan for the heat sink! one fan only and that is the intake fan, which is terribly constricted by that ridiculous face plate and I thought "I can do better"

So I stripped them down, set the intake fan on top of the heat sink blowing down, and that blower fan blowing across them.



And a question for the OP please. How long was it running before it blew?

It had been running for more than a month

[j68r]

Can I just butt in and ask what spec the BFL 120mm fans are inside the single, I am running one outside the case currently in a cold loft and want to get new fans on it and the case back on (originals broken in transit apparently and I don't have them)

tried some noctua 1.44W 0.14A things the guy gave me when selling and they're hopelessly underpowered.

TIA, and good luck OP.

[jojo69]

try the Nidec Servo (Scythe branded) gentle typhoon 1850s

finest fan I have ever dealt with

http://www.sidewindercomputers.com/scge120mmsic2.html

[Jcw188]

OP is there any BFL warranty?  or had you manipulated the single in any way that voids a warranty?  I have often wondered about this, seeing how shady BFL was originally with their delays.

[Bicknellski]

OP is there any BFL warranty?  or had you manipulated the single in any way that voids a warranty?  I have often wondered about this, seeing how shady BFL was originally with their delays.

Any news?

[jojo69]

here is my 60 single's new trick, it will run about 12 hours at rated hash, then starts slowly dropping speed.  Used to be it took me a few days to notice because it happened slowly, now I will be under 40 in 24 hours and I am rebooting it daily.

anybody heard of this one before?

[Bicknellski]

here is my 60 single's new trick, it will run about 12 hours at rated hash, then starts slowly dropping speed.  Used to be it took me a few days to notice because it happened slowly, now I will be under 40 in 24 hours and I am rebooting it daily.

anybody heard of this one before?

Memory leak?

[lightfoot]

The software load on the LS is really sensitive to temps. Check to see if any of the fans are blocked or down, if you really want to I can take a look at it, drop it in the mail.

Speaking of which I bought a 23.5gh LS that I have boosted to 28gh. Can be done just need software and heat sinks in the right place.

[jojo69]

temps are stable while it is at full speed, then temps drop with hashrate, if it was thermal I would expect dropping hash with stable temp

I think software, was hoping it was a known issue

[lightfoot]

temps are stable while it is at full speed, then temps drop with hashrate, if it was thermal I would expect dropping hash with stable temp

I think software, was hoping it was a known issue

Hm, you're right. Does the power supply get warmer? When the hashrate is dropping, what do you see per chip by doing D, then M to switch to per chip stats? I'm wondering if chips are dropping, or the clock is dropping.

Post and let us know.

[aurel57]

I had troubles with my single, wrote BFL for a RMA and within 2 days received an email asking for my original invoice # and email. I wrote back telling them I bought the unit second hand and did not have that information. Within another day received a RMA. I sent the unit in and received a single back in about 1 week. It appears they just removed my cover and placed it over a brand new unit. Really overall great service.

I also have another single that acts the same way of slowing down after about 12 hours. I just stop and restart the easy miner and it goes back up to 58/59GH. I think it's either software or memory problems with my desktop.

[Bicknellski]

OP is there any BFL warranty?  or had you manipulated the single in any way that voids a warranty?  I have often wondered about this, seeing how shady BFL was originally with their delays.

Any news?

Any news?

[peterepeat]

OP is there any BFL warranty?  or had you manipulated the single in any way that voids a warranty?  I have often wondered about this, seeing how shady BFL was originally with their delays.

Any news?

Any news?

I have received an RMA number from BFL

[lightfoot]

Cool. Still want to return it, or sell it?