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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: ROI on gridseeds? really? on: April 17, 2014, 11:54:41 PM
Doubt it but hopeful.   Even at $80 and even if none of the next generation ships until Q4 , a metric shitton of the GSD blades which are 16x the 5chip ones are coming online as we speak..  Huh     You don't have to wait 2 weeks though ... 1-2 days is easily possible to have them in hand.
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: GridSeed 5-chip USB miner voltage mod on: April 17, 2014, 11:47:27 PM
Just a small note to all of you modding your units. I had 6 of mine not working and it seems they were not working because the screws were too tight and some solders snapped off. So be VERY careful when you put your pods back together! Right now, from 30 modded units it seems I only ended up with 1 paperweight (seems like one pod is too damaged Sad ) with the other 5 being recovered, which is good enough for me Smiley

Wow..how much torque did you use?  I've tightened some pretty tight and was a bit worried, but so far nothing adverse that I have noticed.  Still using the stock crappy blue maxipad and some added arctic silver 4 (yes I've read the warnings against using it...its fine in my opinion/research).  

I have noticed, as someone posted earlier, some that work great for awhile at >1150 stable then hours or day later start throwing HW errors and have to be lowered..permanently.   They also seem to perform better or worse at different times of day.   I don't think that is heat related where I have them, may be power sags?  

Personally if any of mine did >=1000 stock I don't think I would mod that one.  Best I have seen stable is 925, but I only have 7.   I have a few more ordered and after the trial at stock speed I may just do the two jumper mod, or leave them stock. 7W is pretty nice vs. 25+.


3  Alternate cryptocurrencies / Mining (Altcoins) / Re: GridSeed 5-chip USB miner voltage mod on: April 10, 2014, 12:23:18 AM
Also, after some testing here, it seems that these "mods" are somewhat bad. As far as I know, we get paid per share. I'm hashing away at ~530Kh/s (Running at 1213Mhz with 0 HW), but after 1 hour my machine that is hashing at 400Kh/s (900Mhz with 0 HW) is making just a few shares bellow the OC one (Like less than 5). I'm not even sure if I'm going to mod my other miners (I could be wrong). Anyone else who modded their units are running into this problem?

Thanks!

Yes.   Seen that.

I only have 7 of these, but, just about every single quirk someone has reported in this thread I have encountered on one or more of these.  These things are workhorses in some ways but can be really finicky.    

At this point I am almost regretting removing VMOD2 (2 jumpers) on the 4 I had done it to to go to VMOD3 (replace r52 with higher resistance).  Even with only 46k it seems the power usage is so much more for little benefit over VMOD2.    The one I put 49k on only now gets to 1163.    

I have definitely seen one of them seemingly hash for a long time and only report a few or no shares actually accepted.  Lowering the speed helped.    Also seen ones that seem to do better at lower speeds than higher, even though they never report a HW error.   Of course you fall into the trap of variance when watching them over any short period, but some of these were 12 hour runs(still short) on the same pi, same pool and same cgminer instance.    

I like to run per chip stats, it seems to usually be only 1-3 chips on each pod that throws HW errors, guess it depends on if the other chips produce more valid work or not by going higher whether it is worth it. 
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