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The Jalapeno case doesn't allow for a lot of good air flow.

When running out of the box I was getting 5.8 - 5.9 when it first started mining and then dropped to 5.6-5.7 Gh/s after it warmed up. Soto increase air flow I did the following:

1. Take apart case
2. Flip top over and put on bottom
3. Flip fan around so that it is blowing down
4. Run screws through fan and plastic spacers into top which is now on bottom
5. Runs cooler and faster now

Getting 5.9 - 6.0 Gh/s now
Running on Cgminer 3.1.1

Thanks to Sadpandatech for selling me the thing and for the great suggestions.

http://serason.com/BFL1.jpg
http://serason.com/BFL2.jpg

Congrats!

I'm jealous

Wait, so the fan was originally pulling air through the heatsink? BFL engineering excellence right there. 8)

Whoo hoo!  Nice to see some shipped BFL product being put to good use!  thought it was actually delivered customer order...was this unit purchased from a customer or some sort of dev., magazine writer, etc? 

congrats nonetheless

Purchased by rjk who sold his preorder to sadpandatech who then sold to me.

SO this was real product that was shipped not a sale given priority for a PR reason??  IOW - a trickle of jalepenos is actually leaving bfl still - which of course is great news..

Did BFL ship the Jalapeno directly to you?

Or rjk had to do forward shipping ?

congrats

sadpandatech shipped it to me but I think he got it directly from BFL.

Dude, nice!!! more pics!!!

ya, they drip ship bit by bit.. slowly .. Josh taking his sweat time

Actually it makes sense to pull the heat away from the PCB rather than have hot air blow over it. I suspect the fan may have a poor blade design. The real problem is the casing.

Unfortunately no. You want to increase the air that moves over the entire surface of the heat sink. If you suck, the air will take the shortest path possible through the heat sink blades leaving some surface area with sub-optimal surface flow. If you blow air, it forces air into every nook and cranny of the heat sink increasing airflow over the entire surface. Proper heat sink blade design will prevent back-pressure and eddies.

An exception would be ducted heat sinks that have a clear input to output flow design, but that isn't what we have here.

The casing is indeed strange. More thought was given to style than function.

Perhaps they can team up with:


https://cryoniks.com/#!/app/tech/

Grats on actually receiving  one!

What's the other BFL units in the picture, FPGA?

I noticed there are 5 HW errors in that photo. Might want to look into that.

Skeptical post is skeptical.

A bunch of people have received Jalapenos now. 

35 on this list: http://bfl.ptz.ro/

Yeah, three fpga singles.

Sweet! Congrats!

First off, GOOD JOB!
Second. I a convinced that with firmware updates and proper cooling you can push these past 7 GH/s. I am totally drunk now but I hope to elaborate tomorrow, and if nothing else when I receive my Jala. I wish you the best on your DYI hacks!

Also: If you would want to try it out, I have a few high quality CPU fans (thermaltake) and water cooling components I would be happy to send you if you want to experiment more. I wouldn't worry about charging you for them, just for you to cover shipping. IF you are in the US, PM me!

Yeah - this week I received 2 units here in Australia - and I was suprised to find a nice pair of Alpaca socks included! 
I ordered on the 2nd day.

I also found that strange.

By the way, did he pay for 7 Gh/s?

If not, then people may very well get more than 5 for free....why pay more for the upgrade?

interesting, Ill have to try that.

my jally runs 5.56 ghs (2 day ave) @ 38 C and 3.2 v with a 140 mm fan blowing at its intake.

without the fan it was around 44 C and 3.35 v. cant remember the exact hash rate though.

seems the warmer it gets the more volts it gets.

really wish bfl would pay attention to cooling over looks. its so noisy no one would put it on their desk anyway, my single and jally are in the basement.

{Rolls Eyes}

looked at percentage wise its not significant.

my jally in 2 days has had 4 hw errors.

0.000060% if Im doing the math anywhere near right.

Yeah that's insignificant. I wouldn't want to see more than 1 per hour on a device like an ASIC or I would be asking the software dev for advice.

First two days of Jalapeno orders filled.  Almost a year to go.

How long did it take to fill out 2 days of Jalepenos?

Should I start counting from April 1st or May 1st?

60 days to fulfill 2 days worth of partial orders....yikes.

OK tried it. open case, fan blows down. EDIT: same 140 mm fan blowing at it. ambient 20 C

one other thing I did was remove the heatsink and dab some MX2 around where the now broken up thrmal tape was. originally I was going to use straight MX2 without thermal tape but the chips are bare and I was worried about cracking them. so I left the pieces on and filled it in with MX2. I also applied MX2 to the PCB opposite the 2 hashing chips so the load plate would maybe pull some heat off the back of the PCB.

end result: 33 C temps, 3.1 v. same hash rate though.

33C would feel cold to touch, hardly worth having a fan!

heh.

20 C ambient in my basement. also forgot to mention the 140 mm fan is still blowing at it (edited my above post to reflect this).

Did you have a specific criticism? Or were you just disagreeing with who posted the information?

in case anyone wondered what the guts look like, heres a (crappy) pic:

https://i.imgur.com/lSu2RVl.jpg (http://imgur.com/lSu2RVl)

there any way to overclock them?

Please dont accept this information as fact...

1) the information submitted is 100% honor system
2) I have been marking them as delivered based purely on the order dates that have been submitted by matching up what BFL_Jody says compared to what some random person on the internet claims they ordered and when.  
3) people frequently put fake orders in showing them ordering 50 mini rigs.  I just delete those, however, if somone was just putting what looked like a reasonable order in, I would have no way to verify it and would just add it.  It is entirely possible that some of these orders are not real.

If anyone see's any errors / problems with this data, please PM me and I'll correct it.  

With as much BFL haterade gets drank around here, I wouldn't be surprised if half of those "orders" were faked. Not to mention that there's no way for people to update their information indicating their orders have been received.

That's great news. But at this velocity, I'll get mine in 2015...

 Nice work. Looks much happier "out in the open" like that with plenty of room to breathe.

No wonder singles are still MIA.

They probably need to machine out a whole side before the chips will be able to "breathe" enough and that's only with *2* chips in.

I'm right there with you, man.  :-\

Hopefully things start gaining momentum. It does seem to be going that way; lots of these things starting to show up in the wild.

I hope so...  ::)

"Flip top over and put on bottom"

Could you clarify this bit please? What did you exactly do? :)

when you take it apart youll notice the top has screw holes. put the rubber feet on the top, flip the top over and use it as the base.

I recomend you stop thinking about it, hopefully it will surprise you in the mailbox ONE DAY.

I'm wondering if water-cooling the Jally would be over-kill?

are those 120mm or 140mm fans?

Fans are 92 mm low profile on the jalapeño as standard.

Ah, they look bigger

I wonder if replacing the fans voids the warranty. 

I tried removing the case and flipping the fan direction and noticed a reduction in temperature (from 40 down to below 30 °C), however I did not notice an improvement in hashrate (it remained between 7.0 and 7.2GH/s)
What did seem to have an influence though was the temperature of the chips when it is powered up.
For example, when it was hashing at 7.15, at 40°C, I powered it off, waited a few seconds, then powered it back up and noticed the hashrate was lower 6.9 GH/s

Someone mentioned that the Jalapenos performs some sort of capability sweep at power up, so I was wondering if starting them from colder may have a positive effect.

So I chilled the Jalapeno in the freezer for about 20 minutes (unpowered), took it out and then powered it up as usual - this time it was hashing 7.6 GH/s - and has continued to do average this for the last 36 hours. I am now to afraid to try the process again in case it was a one-off fluke power up state of the chips that  I may never see again  :)

so in summary for me (recent 7GH model)

1. the fan trick did not provide any noticeable hashrate increase, but brought the operating temperature down lower.
2. There is a slight possibility that powering up the Jalapeno from a lower temperature may provide a higher chip operating setting. YMMV

 Instead of doing all these crude hacks, why don't you simply read through the source code of the firmware and work out what has an effect first?

now that its stable @ 7.6GH/s I will indeed read up on this

cheers

congratulations

Is these possible to put the extra chips that will be order to jalapeño board? Or not

maybe you can but u need to keep your chips from overheat and also MOSFETS might get too hot.

I think this could be possible.
The board may need to be stenciled on the spare pads with solder paste, then the chips could be heated on.
Some shops can xray to check if the BGA chips are installed correctly.