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Author Topic: BFL Single + Delta = Whoosh!  (Read 3630 times)
1l1l11ll1l
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May 15, 2012, 05:05:50 PM
 #1

Standard motherboard risers were needed to get it high enough over the heatsink. This is the first release of the BFL single

Using Delta fan, Dell P/N P2780.
Running it at full speed, simply connected the black to ground, the red to +12v from the computer's Power Supply.
@ 2.5a I'd not recommend connecting it to the BFL single's fan port!





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ice_chill
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May 15, 2012, 05:18:18 PM
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Does it have vibration dumpers, vibration might not be good for the solder on any component above 60c.
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May 15, 2012, 05:18:54 PM
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Can I ask WHY?
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May 15, 2012, 05:25:20 PM
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Does it take off and float around the desk, or have you bolted it down?
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May 15, 2012, 05:29:17 PM
 #5

Video + sound here already Grin http://vimeo.com/41028028

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
Stephen Gornick
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May 15, 2012, 09:16:13 PM
 #6

Can I ask WHY?

The description for the video reads:
"So I set my Single down on something sticking up by accident one day, and it caught the spinning fan blades and broke them off. I decided to fix it myself."

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May 15, 2012, 09:18:12 PM
 #7

Can I ask WHY?

The description for the video reads:
"So I set my Single down on something sticking up by accident one day, and it caught the spinning fan blades and broke them off. I decided to fix it myself."
I'm not OP, but I did it first. Grin

Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
Valalvax
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May 15, 2012, 09:51:59 PM
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That's amazing, though letting it suck shit up probably isn't very good
1l1l11ll1l
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May 16, 2012, 03:43:51 AM
 #9

Can I ask WHY?

The description for the video reads:
"So I set my Single down on something sticking up by accident one day, and it caught the spinning fan blades and broke them off. I decided to fix it myself."
I'm not OP, but I did it first. Grin

Curse you RJK!

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cuz0882
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May 16, 2012, 08:35:44 AM
 #10

Hopefully that's going to a fan controller.. I take it the 92X92X38 does not fit inside the case? I've been waiting for someone to say the max amps we can run off the single fan connector. I was thinking this one would probably be ok, plus I should be able to sleep at night. http://www.newegg.com/Product/Product.aspx?Item=N82E16835705011
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May 16, 2012, 02:38:08 PM
 #11

Hopefully that's going to a fan controller.. I take it the 92X92X38 does not fit inside the case? I've been waiting for someone to say the max amps we can run off the single fan connector. I was thinking this one would probably be ok, plus I should be able to sleep at night. http://www.newegg.com/Product/Product.aspx?Item=N82E16835705011
Those are the ones that came with mine, actually. Or if not the same, extremely similar. I can't be arsed to take it apart again just to look at the part numbers.


Mining Rig Extraordinaire - the Trenton BPX6806 18-slot PCIe backplane [PICS] Dead project is dead, all hail the coming of the mighty ASIC!
1l1l11ll1l
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May 16, 2012, 04:46:13 PM
 #12

Can I ask WHY?

The description for the video reads:
"So I set my Single down on something sticking up by accident one day, and it caught the spinning fan blades and broke them off. I decided to fix it myself."
I'm not OP, but I did it first. Grin


Here's side by sides of the fans:



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cuz0882
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May 16, 2012, 11:45:21 PM
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Hopefully that's going to a fan controller.. I take it the 92X92X38 does not fit inside the case? I've been waiting for someone to say the max amps we can run off the single fan connector. I was thinking this one would probably be ok, plus I should be able to sleep at night. http://www.newegg.com/Product/Product.aspx?Item=N82E16835705011
Those are the ones that came with mine, actually. Or if not the same, extremely similar. I can't be arsed to take it apart again just to look at the part numbers.


I think it comes with
2700rpm
45cfm
32dba

Although, some people have been reporting different fans. I would like to something a little better, but that still fits in the case and fits on the singles fan port.
pazor
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May 17, 2012, 12:00:33 AM
 #14

this fan sounds like a mixer...
 Grin

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e21
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May 17, 2012, 05:43:15 PM
 #15

Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?
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May 18, 2012, 07:01:11 PM
 #16

Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?
All of my 10 came with a bottom fan.  It's just a little 40mm thing inside the bottom of the case though... not sure why people are making a big deal over it.  Regardless, they all stay below 60c, and none of them throttle.  And now I only have 4 of them left, and they're running even cooler (more space between them).
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May 18, 2012, 07:02:17 PM
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Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?

Correct.  Some are still shipping with a bottom fan bodged on.  At least they didn't take a sawzall to the case as they did with gigavps's first Rev 1. Smiley

While this is definitely a BFL design issue, FPGAs are notorious for thermal inconsistency across the same chip type and program.

I see; I am just entering the field of FPGAs and am expecting my first BFL Single to arrive this afternoon, so that is useful information for me, thanks!
SgtSpike
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May 18, 2012, 07:17:18 PM
 #18

Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?
All of my 10 came with a bottom fan.  It's just a little 40mm thing inside the bottom of the case though... not sure why people are making a big deal over it.  Regardless, they all stay below 60c, and none of them throttle.  And now I only have 4 of them left, and they're running even cooler (more space between them).
Mine came with the same 80mm fan that is inside the case.  Except this is mounted on the bottom, outside the case.
Oh, so there's two different types of bottom fans then?

Eh, I'll have to look more closely to find out exactly what it is.  None of mine came with an 80mm mounted to the bottom though.
cuz0882
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May 18, 2012, 08:54:00 PM
 #19

Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?
All of my 10 came with a bottom fan.  It's just a little 40mm thing inside the bottom of the case though... not sure why people are making a big deal over it.  Regardless, they all stay below 60c, and none of them throttle.  And now I only have 4 of them left, and they're running even cooler (more space between them).
Some of the new rev 3's throttle at 54c. I have mine in a 66f room and they seem to throttle with anything higher. I had move them about a foot off the ground or they throttle. The viewable temp does not seem relevant to when they throttle. Replacing the pins that hold down the heatstink with bolts lowered the temp on mine about 3-4 degrees. Those pins are cheap crap they come with, most seem to break off or come lose in shipping.
SgtSpike
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May 18, 2012, 09:02:53 PM
 #20

Is the new cooling solution on the revision 3's still not sufficient to keep the Singles from throttling in an average environment? Say 23* C?
All of my 10 came with a bottom fan.  It's just a little 40mm thing inside the bottom of the case though... not sure why people are making a big deal over it.  Regardless, they all stay below 60c, and none of them throttle.  And now I only have 4 of them left, and they're running even cooler (more space between them).
Some of the new rev 3's throttle at 54c. I have mine in a 66f room and they seem to throttle with anything higher. I had move them about a foot off the ground or they throttle. The viewable temp does not seem relevant to when they throttle. Replacing the pins that hold down the heatstink with bolts lowered the temp on mine about 3-4 degrees. Those pins are cheap crap they come with, most seem to break off or come lose in shipping.
Yeah, like I said, I didn't see any of them throttling.  When I had all 10 of them running (in a 70F room), I know a few were close to 60C.  That was with them all literally touching each other in a line though.  Now that I have just 4 of them running, I turned up the A/C to 72F and now two are at 52C, and two are at 45C.  None of the pins came loose or broke in shipping that I knew of.  I haven't opened them all up though.  One of them did have a screw loose on the main 80mm fan up top though.  A quick tightening, and all was good.
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