A Look at the BFL Jalapeno and Little Single [Video]

[Photon939]

Video is a mini review of the BFL units as well as a teardown of the Jal and LS power supplies

https://www.youtube.com/watch?v=PItCbRUFsQo

[tom99]

Did you try to OC LSC and I wonder how much hash for OC it.

[Photon939]

Did you try to OC LSC and I wonder how much hash for OC it.

I haven't tried for fear of bricking it, the board is different so microcontroller pinouts may have changed. Since BFL sets the security lock bit on the micro, I cannot read the flash memory back to the computer to create a backup of the original firmware. It can only be erased completely.

[tom99]

  you can not read it and Jal firmware cant be read also.
 

[crazyates]

I noticed that my LSC ran at 30.5GH/s for the first week or two. I had unplugged it several times and repowered it during this period.

Then it just decided to start working at 31.5GH/s. I've since repowered it several times, and it's stayed at 31.5GH/s. I gained 1GH/s for no apparent reason, and it's stayed. Really weird.

[ninjaboon]

I noticed that my LSC ran at 30.5GH/s for the first week or two. I had unplugged it several times and repowered it during this period.

Then it just decided to start working at 31.5GH/s. I've since repowered it several times, and it's stayed at 31.5GH/s. I gained 1GH/s for no apparent reason, and it's stayed. Really weird.

when you powered off your LS, was it cooled down by fans?

[crazyates]

I noticed that my LSC ran at 30.5GH/s for the first week or two. I had unplugged it several times and repowered it during this period.

Then it just decided to start working at 31.5GH/s. I've since repowered it several times, and it's stayed at 31.5GH/s. I gained 1GH/s for no apparent reason, and it's stayed. Really weird.

when you powered off your LS, was it cooled down by fans?

Huh? No, the fans did not keep going when I powered it down.

However, I did try the freezer trick. Left it in there for about an hour, and it was nice and chilly. Did nothing. No speed increase. It was about my 3rd time powering it up after the freezer trick that the gain happened, and it's been like that ever since. Weird.

[Photon939]

I noticed that my LSC ran at 30.5GH/s for the first week or two. I had unplugged it several times and repowered it during this period.

Then it just decided to start working at 31.5GH/s. I've since repowered it several times, and it's stayed at 31.5GH/s. I gained 1GH/s for no apparent reason, and it's stayed. Really weird.

when you powered off your LS, was it cooled down by fans?

Huh? No, the fans did not keep going when I powered it down.

However, I did try the freezer trick. Left it in there for about an hour, and it was nice and chilly. Did nothing. No speed increase. It was about my 3rd time powering it up after the freezer trick that the gain happened, and it's been like that ever since. Weird.

Odd that cooling it didn't help, since the BFL hardware performs a clock test every time it powers up; cooler chips should give you less errors. Perhaps you just got lucky and a few flaky engines happened to give the correct nonces during the power-up test that resulted in it setting a higher clock speed or enabling a few more engines

[nexus99]

Any pointers on how to power a Jally with an ATX power supply?

[crazyates]

Any pointers on how to power a Jally with an ATX power supply?

Get an adapter from Cablez?

[nexus99]

Any pointers on how to power a Jally with an ATX power supply?

Get an adapter from Cablez?

https://bitcointalk.org/index.php?topic=74397.0

I think this is what you are referring to?

[Photon939]

Any pointers on how to power a Jally with an ATX power supply?

I chopped the barrel jack from the PSU the Jalapeno shipped with and spliced it to a female molex connector. Molex power splitters and passthroughs are dirt cheap.

On the Jalapeno PSU the white wire is positive and the unjacketed wire is your ground. On an ATX PSU 12v+ is yellow, black is ground.