Topic: [CLOSED] Prisma 1.4Th/s group buy @ 1.42 btc with coupon - page 3. (Read 21211 times)

I had it working. What's the issue? Do you get the USB device detected by Linux? By cgminer?

Has anyone here had luck with the Prisma using USB and a Raspberry Pi? I bought a unit from a grp buy member and can not get it to work.

What email address should we send the shipping label to?  The one in your profile is hidden

*edit*
found it, I'm missed it.   

Also,  these miners should be ready to go once you have cgminer install on a computer?   No additional interface components required?

That's a question for ASICMiner.  They have posted some info regarding shipping delays etc... on their threads. I can tell you that once inventory arrives it's shipped out in the order of payments.
thanks

Hey Canary -

Thanks for the group buy!

Any thoughts on the current leadtime?  I mean if I were to order today will it be a week out or more still?

TIA!

Thanks for the data.  This fan is moving some serious CFM

bcollan, I've trying to reach you for quite a while... Plz respond.

I've been skeptical on Pis ability to handle tubes/prismas...

I wonder if this is something useful however: https://bitcointalksearch.org/topic/do-you-hate-the-pis-usb-ports-like-i-do-here-is-a-fix-for-us-miners-843788

Just a heads up on the rpi with these.  The rpi had to be rebooted about every 6 hours as the hashrate falls.  Ended up moving all the miners to a PC and they have been running for days now without a reboot.  Have had similar issues with other miners on the pi.

I will be putting out a packaged version of cgminer 4.7.0 for Rasbian as soon as we can get the bugs in the build system ironed out.  I do not know if I will be able to back port to wheezy or if they will only be early builds for Jessie.  I have a working package for Jessie now on Rasbian but want the official numbering fixes done before I let it into the wild.

PMed

I'm an idiot. I was thinking a USB adapter was some sort of brand specific USB hub. GG.

I have a bunch of RaspPis laying around from selling off my old scrypt stuff so I'll convert one to run the Prisma.

While were on the topic though... How much you asking for a BE controller?

I have both... Prisma comes with USB adapter by default.

Canary, happen to have on of these ASICMiner USB adapters or a BE Controller?

Thanks again Canary got my first order yesterday and all was just as expected.

You can use the BE Controller or a raspberry pi. You'll need the usb adapter supplied by Asicminer to connect the rpi to the miner.  You can follow this guide (but use cgminer instead of bfgminer):

https://bitcointalksearch.org/topic/m.8549984 

use cgminer --bet-clk 23 for Prisma and --bet-clk 26 for Tube.

Will I need a block eruptor to run 1 Prisma or will just the RaspPi work?

Anyone know if Dogie plans on reviewing and writing a guide for the Prisma?

Here's data on the stock fan: https://bitcointalksearch.org/topic/m.9247490

In reply to your first question, my answer would be "Sure, but you'd better make sure it's a damned good one."  I don't know the CFM/Static Pressure info on these (I think the labels were removed -- kind of like filing the serial number off a handgun, lol) but I think if you go to Dogie's review of the ASICMiner Tubes, he has some info on the fan THEY use -- and I bet it's similar.  

In that same Tube thread -- or it might be the main, ASICMiner/Friedcat announcement thread -- look for a post by phillipma1957.  He went into great detail discussing some mods he'd made to the tube which worked well (and should work here, AFAIK).  IIRC, he had quite a bit of luck replacing the super mega hyper loud one with a pair of slightly less super mega hyper loud fans.  So that's an option, I suppose.


Personally, I found the noise *really* annoying not due to the volume but the *pitch* of the fans.  They just have a loud, high-pitched ... well, literally the exact same sound as a hair dryer (there's a reason people keep using that comparison).  Unlike the other fans which just all kind of fade into the background as a low-pitched "hum" they are absurdly loud and cut through walls and brain-tissue alike.  lol   I think the primary issue (Someone knowledgeable please correct me if I'm wrong) is that even though they're 3-pin fans, they're being run flat-out (100%).  Seemingly no "throttling" like you have with Bitmain fans, for example.  And almost any fan if you run it at 100% is going to be obnoxious.

I'm not sure if that's a mistake, or a design flaw, or if ASICMiner was just lazy...or if they did careful math and concluded that they needed exactly 100% of the fan 100% of the time to cool the chips (although that last one seems a bit unlikely).  Others have hooked up fan controllers (in between the prisma and the fan).  And if you felt like "60% of the fan was sufficient" (and you thought that was going to be the case 24/7) you could always just put a resistor in-line with the ... um... again, let me defer to other websites and/or people who can tell you exactly what kind of resistor and between which wires you want to put it.  But the point is, you can *usually* slow fans down...either crudely (with the resistor method, though that might not work with PWM fans) or with a fan controller, or ideally by doing *something* with the blue wire to throttle the fans appropriately.


Oops.  Sorry, I'm a bit longwinded -- now that I re-read your questions, apparently the normal human reply would have been:

1. Yes.
2. No, I don't know the CFM off-hand, but see Dogie's thread because it's not JUST CFM, but also static pressure you'll want to match.

---

PS, I should point out that I have an exhaust duct sucking hot air from the back of my shelf/rack/whatever and blowing some/most of it out the window.  (Doing my part to destroy the planet...because I'm a complete dick, I guess, but that's beside the point.)  Anyway, I had the Prismas sitting on a different shelf when i was first messing with them -- and the noise was terrible, I could hear it on the other side of my apartment, with two closed doors in-between!   However, yesterday I finally made some room on the rack/shelf/thingy and moved all three Prismaux in there...and since it's partially enclosed (to funnel the hot air out the back vent/duct) the noise just magically vanished overnight.  

Okay, it didn't *vanish* but I can sit here in the living room without clawing at my face and begging to die like previous days.  So if you can enclose/muffle the units just a little bit, that helps a *lot*.  I wouldn't recommend doing that unless you have a duct or fan evacuating that heat, of course--otherwise you'd be creating your own little Bitcoin Greenhouse, which IIRC is *not* a Best Practice if you want things to function longer than a few days.

Hope that helps and if you try something new, be sure to share with the group...  I can still just *barely* hear those obnoxious fans (nothing like it was before, but the AC kicked off just now so I can barely make them out) and the more solutions the better, because I think more than a few people are going to be having to choose between "Mining" or "Divorce" if they can't get these bastards to run a bit quieter.