Topic: [GUIDE] GridSeed GC3355 5 Chip Setup/power/windows/linux/rpi by UnicornHasher - page 13. (Read 365630 times)

Can you share your scrypt or batch file ? I'd like to use it too....
There is no power down etc.command for the fans on the GC3355 miners... the fans are just ON at 12V, period...IF your fans are slowing down then speeding up, your psu is being overloaded...
thx

Yes, the fans sound different for the first second after I start the batch file that calls cpuminer 20 times. It's like, the miners start at full power, then get the command to go low power mode immediately.

I'm using an ATX PSU. Don't think it has any problems. They all power fine. (Sure, it's not gold or platinum rated, but it still spits out 12 volts.)

I put a 200 ms delay after each "start" command in the batch file, and then I put a "taskkill" at the very start so it kills all the miners before starting. I no longer notice or hear the hum since putting in the delay between instances.

That way, I can switch pools and it takes 2 seconds. I can also now introduce a timer to restart the miners, say, once every 48 hours or something.

cpuminer has no api, and always reports zero hash, so there's no way to detect a bad unit except through the pool. I'll need to make something that just reads the output for "yays!" and if too much time has passed, then that particular instance is restarted.

As for modding the miners, I'm in the Philippines. It might become too expensive with shipping.

Can anyone point me in the right direction on how to compile girnyau version of CGMiner on the Hashra image for RPI?  I am having some problems with the stock BFG mine on modded units and this is what people suggest doing.  I am a noob to this and have never compiled anything ever. 

The fans HUMM? Sounds like a possible bad psu or psu's? How many of them hum when you start cpuminer?
There should be no humming if any kind. The fans make a whooshing kind of sound pumping air but other than that, they should be silent. I mean, you can't generally hear their motor's running.
I and I am fairly sure most others don't experience this hum when starting or running our miners, not even in BTC mode.

So if your fans are making a humming sound for any period and are surging when the miners are started, one of more of your power supply/s may be the culprit. If you're using those cheap LED sign psu's that come with the miners, they can and do go bad, sometimes instantly, sometimes not so instantly .,...
If a psu goes bad, it can either just quit or it can damage if not destroy the miners it's powering.

I can modify your miners for you if you'd like to have them overclocked and making you up to 350% more in profits with ultra quiet fans too! PM me for details if interested.

And, I agree. Putting a lag between each miner starting is a good idea. Batch files can run too fast and start miners within milliseconds of each other if not tamed .

Hope this helps you avoid any catastrophic loss of any of your miners etc.

Good luck!

You probably want these to mine something other than Litecoin. Depends, it's probably a better idea to just buy the other currency instead, if you can find a seller or an exchange that has the volume you need.

I'll probably buy a bunch of them if they go down to $70 per unit. (Note: I will buy from you at 70% of the lowest retail value, any working units you have.)

Prices have dropped fast on these...down to $100 a unit. Not nearly the $14.40 price they should be sold at to compete with the Titan but getting there.

Must resist ordering...next week they may be at $80  

For kicks I ran it through the profitability calculator. Not looking good:

I notice when I stop all instances of cpuminer (or minerd, or minerdOC) for windows, and then do the batch file to start many instances, the fans seem to hum a little bit louder at the start, as if it gets full power then turns off the BTC core (for single mode scrypt only).

Would it make sense to pause half a second between starting each instance of cpuminer?

I think I'll do that anyway. If you have 120 devices, it will take a minute for all of them to be fully running. I'm having fun with this batch file thing.

So far, I can start them, one at a time, or all at once. Stop them all at once. Set each unit its own frequency, or the same for all. Set them all to one pool, or one worker, or even a different pool and different workers.

I can do it.
Someone buy a blade and send it to me to volt mod. If it can be done, I can do it.
PM me for details....

You would be surprised.  It was the same with the October Jupiters which ran for 7k a pop.  It did not stop the tinkers and EE's messing around to get more bang for the buck.  It is just a question of when.

I do not think we need a Rpi to run them. And yes would be awesome if we can voltmod the blade, but who is going to buy one and has the knowledge to find out how to mod it?? that's the question.

it's not like a cheap 120$ gridseed that anyone can get their hands on

I wonder if the blades will be able to be OC'd to 8Mh/s similarly to the 5 chip miners. That would be stupendous at this price point.

Is a Rpi required to run them though, I would hope not?

I had issues with my RPi running Raspbian freezing/crashing for almost two weeks, but have now been up and running for 3 days since following the advice in this thread- http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=70437

I appreciate the help of everyone in this thread, hopefully this info can help others.

One question for you pros out there; now that it's running stable, every so hours one of my miners will stop working and instead of hashing cgminer shows it as "OFF". Simply turning the powered USB hub and then back on gets everything working again, but it's a little frustrating. It's happened a few times and is a different unit every time, so I can't see it being a problem with the hub or a cable. Any suggestions?

Maybe....
Or....
You can just use cpuminer... You can set each miners hash rate separately, overclock them with cpuminer OC version if they are modified, and you can run each instance separately or via a batch file so you don't have to set and start each instance separately. It's a piece of cake to use, works great with 5 or 10 and up to 20 or even 30 miners easily!

www.Hashra.com is having a sale now... the new Gridseed Blade Plus - 5000KHs miner, complete with psu, controller, cables, software etc. Only $1600 for the whole smash! What a deal!
GC3355 miners for only $105 each in lots of 10 or more! The price has come way down!
I'm gonna pick me up 10 or so right now and, maybe a blade or two, too!

And, if you need your GC3355 miners modified to increase their performance up to 500KHs+ each, let me know via PM. I can take care of your mods for you if you can't do it yourself!

Could someone please help me understand what the errors mean in the picture below. If I get  58 errors and 416 accept does it mean I'm losing 10-15% hashrate for that miner. Would it make more sense to run it at a lower speed instead? Thanks.

Connected 5 per. Then after 3 minutes, one set of 5 died. The bad thin wire melted. I bought some speaker wire that was defective, but it was only 3 meters (10 feet) long, so I'm not going to bother having it replaced. It's colored black and red, the red one is corroded all throughout. So I just replaced that one with another black wire, but noted that it should still be positive.

The rest of the power wires use 18 AWG or equivalent, no problems there.

From everything I've researched, all yellow wires are 12V, so I'm going to use all the yellow wires, maybe maximum of 5 gridseeds (in scrypt only mode) per yellow / black pair. This includes even the ones for the cpu and the 20/24 connector for the motherboard.

I've already shorted the green wire for always on operation.

Yes, for the Molex connectors, the yellow is 12V, the red is 5V, and the blacks are the grounds. I would recommend that you stick to Molex connectors because you can easily buy or find the male connectors and solder them to barrel connectors to make them removable. You can buy 8-to-1 barrel splitters on eBay, cut the end off, and solder it to a Molex connector.

Ok. I've been using a cheap ATX power supply to power some gridseeds, now I'm going to really hack it (cut the wires). I take it, from all the googling I've done, all the yellow wires are 12 volts positive, and I just need to use the closest black wire as the ground. So that gives me power from the molex, the sata, the cpu, and the main atx bunch of wires.

I'll let you guys know. This PSU won't be used for anything else.

I've finally figured out the source of the problem. It was the power adapters! I purchased 4 of the 20-Gridseed bundles, so I received 10 power adapters (each one can power 8 Gridseeds). After pulling my hair out for weeks, I finally narrowed the problem down to the power adapters. Only 2 of the 10 I received were working properly when powering multiple Gridseeds. When I cracked them open, it became really obvious as to why:

http://i.imgur.com/TKh1lyr.jpg

http://i.imgur.com/LfOVqlI.jpg

Look at those capacitors bulging! All 10 of them had bulging capacitors. The capacitors in the 2 power adapters that were working had the least amount of bulge, but they were bulging as well. The worst ones were even leaking, and one even had a capacitor that was loose and barely connected!

If you're using one of these power adapters and are having issues where your Gridseed miners look like they're hashing, but are not submitting shares after a few hours, you can run this simple test to see if the power adapter is at fault:

Plug the barrel connector of the power adapter directly into a Gridseed and listen to the fan noise. It should be a fairly audible whir. Next, plug the 8-to-1 barrel splitter into the power adapter, then plug one of the barrel connectors on the splitter into the Gridseed. Listen to the fan noise again. If it sounds the same, your power adapter is working properly. If it sounds like it's spinning slower, then you have a bad power adapter.

I've since switched all my Gridseeds to use an ATX power supply and now they're happily hashing away.

Is anyone here running multiple gridseeds at different frequencies on windows? If so can you please help me out I have been trying to figure this out for a few days now with no luck!! Thanks in advance!

***edit. I figured it out :-D