Topic: GridSeed 5-chip USB miner voltage mod - page 40. (Read 157009 times)

Why am I getting an average of 550 KH/s at the mining pool if I have this setup after OC?

 Block: ...ae7b1605 # 38916  Diff:16 (125.7Mh/s)  Started: [02:45:01]
 ST:6  F:0  NB:17  AS:0  BW:[ 19/ 11 B/s]  E:0.01  I: 1.23 BTC/hr  BS:0
 2            | 966.3/988.3/503.4kh/s | A:139 R:4+0(none) HW:4/none
-------------------------------------------------------------------------------
 GSD 0:       | 495.8/493.9/245.2kh/s | A: 66 R:2+0(none) HW:0/none
 GSD 1:       | 495.8/492.9/265.2kh/s | A: 75 R:2+0(none) HW:0/none


Is this an issue with my miners or is an issue at the Pool?

Thanks in advance for your input guys!

Wow.. what a beautiful site... is this the 49.9K or the 47.k?

and at what freq?

HURRY UP PUBLIC HOLIDAYS will you end already I have stuff waiting to arrive in the post and they will not come because of these holidays, I mean I do love a holiday but I would of loved to have it after I got my stuff lol

EDIT: DOHH Ignore my freq question its ifront of my face --- 1200mhz

Exactly what I think.  And this is too beautiful - why switch to dual mode?  No looking back for me...

 GSD  0: 6D87257F5650 1200 MHz | 508.4K/512.7Kh/s | A:2816 R:0 HW:0 WU: 39.6/m
 GSD  1: 6D80538C5650 1200 MHz | 508.2K/512.7Kh/s | A:2180 R:0 HW:0 WU: 35.2/m
 GSD  2: 6D8D369C5650 1200 MHz | 508.4K/512.6Kh/s | A:2764 R:0 HW:0 WU: 41.5/m
 GSD  3: 6D8E40594857 1200 MHz | 508.3K/513.2Kh/s | A:2640 R:0 HW:0 WU: 40.4/m
 GSD  4: 6D8415984857 1200 MHz | 508.4K/512.7Kh/s | A:2316 R:0 HW:1 WU: 34.9/m
 GSD  5: 6D80489F5650 1200 MHz | 508.2K/512.6Kh/s | A:3188 R:0 HW:1 WU: 47.0/m
 GSD  6: 6D7A375C5148 1200 MHz | 508.4K/512.8Kh/s | A:2604 R:0 HW:0 WU: 37.0/m
 GSD  7: 6D9534725251 1200 MHz | 508.4K/512.8Kh/s | A:2484 R:0 HW:1 WU: 38.4/m
 GSD  8: 6D91277E4853 1200 MHz | 508.3K/511.2Kh/s | A:2604 R:0 HW:0 WU: 36.0/m
 GSD  9: 6D8D35AC5650 1200 MHz | 508.5K/512.8Kh/s | A:2612 R:0 HW:1 WU: 37.6/m
--------------------------------------------------------------------------------

HAHA! bro id light me up some and end up turning on the tv... be like 361kh is alright for me ~ too smashed to even attempt to mod it..

Ok so the POTS 50K resistor is to go in the vmod 1 position? not the vmod 3 position? correct? as it is variable? just trying to wrap my head around these mods and the meaning behind them.

Also do you think this will work ok? to save power by only have 1 fan per 2 pod?  https://www.dropbox.com/s/8q278fnjgzd18hj/mash2.png Obviously its a photo edit, not real. but i am just thinking if I have one of the boards backing the fan it may block the airflow to the other board below , hmm maybe not a good idea, unless you some how stick the fan on the side but that would look shit lol

What are you going doing for power when you have them modded? currently i would like to have 10 grids per PCIE 6 PIN is this still a viable option when they are v3modded?

@ HappyDAze
Thanks Happy!, I think the most ROI option wold be to do Vmod 3 not dont even think about reversing it , unless someone else makes the SuperVmod, which gives you the option to switch from vmod3 even then unless you really love dual mining like yourself I don't think there is any reason to flip the switch ...

It's an option if you don't have a lot of gridseeds, maybe no more than 20, because of the power consumption.  In my comparisons I was only looking at LTC & BTC.  There are lots of Scrypt coins doing better so focusing on them would probably give you much better results long term.  I've almost convinced myself to switch to Scrypt only and do vmod 3.  I just like the idea of dual mining - hard to let it go. Also, I don't like that I don't have the skills to undue vmod 3.  I'll always have an axial type resistor there if I do it.  There's no way I could solder the type of resistor that is on the board now.  It is incredibly small.  I can undue the bridges easily enough. 

We need some opinions from the electronics gurus here re: the 66 watts used and long term use.  The gridseed is hardly warm. I'd guess low 20's Celsius.  It's actually cooler than one of my older gridseeds even though the power consumption is higher.

Good job, Happydaze ...!

Thank you for sharing your findings and results...

Do you think that dual mining is viable...?

ZiG

I did full vmod 1 on one gridseed and am testing dual mode now.  Cgminer in BTC mode seems to handle 1000Mhz.  I did not test 1000Mhz long though as I wanted dual mode results.  I have to clock everything down to 850Mhz to get cpuminer happily mining LTC at the same time.  900Mhz was too high for cpuminer.  Cgminer 3.8.5 has 50Mhz frequency increases so maybe 875Mhz would work but it is not in the options.  Everything looks stable at 850Mhz in dual mode with vmod 1 in place. 

Preliminary results indicate 9.5 Ghash BTC and 350 Khash LTC poolside.  That puts the performance right in between vmod 3 @ 500 khash single mode and vmod 1 @ 400 khash single mode.  I calculate (for me) that vmod1 dual would give 12% lower performance than vmod 3 and that vmod1 dual would give 11% higher performance than vmod 1 single.  That's all based on today's difficulty and prices and my power costs.

66 watts power consumption - to anyone who really understands this stuff; do I need to concerned about that?  Will it shorten the life of the gridseed?  That's approx 1 amp more than dual mode with no voltage mod (my other gridseeds).

Try this image: https://github.com/mox235/scripta

There is a link to an image in the readme.  I modded all 10 of mine and they are running at 1200Mhz with 0 rejects and 0 hardware errors.  I forked that repo and will be doing some work on that image to make it even better.

It uses a custom cgminer that supports frequencies for each miner so you can tune your rig.

Yes, pot is short for Potentiometer which is a variable resistor.  If I had 50k worth of "pot" I wouldn't be concerned about modding a gridseed

The physical switch is definitely possible.  It wouldn't really be all that hard either I don't think.  The software parameter is the real interesting one I think. 

Sorry I am not understanding pots? is that just resistor? Also Are we talking about this is based on Vmod3 right? I was thinking of Software switch but again, u said another good idea "physical switch" , 2 Wires on the 2 contacts in replace of the R52 resistor and those 2 wires lead you to maybe 4 different resistor with a 4 way switch hhaha.. Stock Mode - 47K Mode - 49.9K mode and then 52K mode

BOOOM we now have SuperVmod- Giving us the choice to Dual mine, BTC mine, Scrypt Mine, + Scrypt mine OC in 3 OC steps.  

Since I am not a electronic guy even though I have soldered a few chips and leds on mobile phones back in the Nokia phone days.. I would need detailed instructions to even attempt this. Also seems like it would be an AWESOME mod but seems like alot of shit that needs to be done... Which is why I initially thought, By doing the Jumper/short mod + changing over 1 resistor to the perfect Kohm amount.. then enables us to flick the swtich with software. Both are awesome ideas if they work , The Physical switch is a definite one that will work but = Harder to do... The Software/hardware mod is easier but Not 100% it will work.

I was looking at these miners and I thought of something to save room,

I was thinking of pulling apart 2 x Gridseeds and removing the fan on one, somehow attaching the heatsink without the fan to the bottom of the other gridseed with the fan , 1 fan is pretty powerfull, this saves us doing the 5v fan mod as now you are only using the 1 fan for 2, so bascially cuts the fan power in half. And ALSO saves room as you have basically mashed 2x grids together and giving the cooling from the 1 fan. WIth the mod this will make 1 double whopper grid with 10 Chips= 1000Kh +  

Something like this >>> https://www.dropbox.com/s/gaykii3dlqvqfjc/mashhh.jpg

Edit:
even better!!>>> I just thought of making it smaller by removing the sink directly under fan in the photo and having the back against one of the boards This makes it smaller  by only having 3 peices of sinks and the fan, like this >>> https://www.dropbox.com/s/8q278fnjgzd18hj/mash2.png - and maybe cooler as the fan is now closer to both boards. Not bad looking for a future 1000Kh little beast

Actually...if you REALLY wanted to just "flick a switch", you could wire up a 3-way switch with the resistance values you wanted, and mount the switch to the side of the gridseed (I stuck my 50k pots to the side of the fan and used the shortest wires I could) and label it.  That way POS1 = stock, POS2=mod.

The way mine is, I just unplug the gridseed and adjust the 50k pots.

Hmmm yeh i know what you mean , its hard to tell if its the mods fault or its just your stuffed up mofset Grid, hmmm I am still waiting on all my accesories to start modding. someone with awesome soldering skills would most likely have fun trying this , hopefully someone does as this will give me an idea - I beleive having a mod that allows you to choose if you want higher voltage or not would be the most ideal mod of them all. This means you do not ever have to revert back to normal all you need to do is flick the switch and boom your back to stock mode

I've done the voltage mod with 49.9kohm resistors and the 5V fan mod on 8 of my Gridseeds, but I'm having a problem. I'm using the Hashra image with a Raspberry Pi, but the Gridseeds are only stable up to 950 MHz. What's weird is, they run perfectly fine at 950 MHz, but the moment I try bumping it up to 1000 MHz, they basically fail to hash at all. To give an idea, at 950 MHz, my pool reports ~3.5 MH/s with about a 3-5% reject rate. At 1000 MHz, my pool reports ~0.01 MH/s with a 80-90% reject rate. Any idea what could be causing the problem?

So where on this gridseed do I find the measurement point for the voltage?

Just for the hell of it and since I couldn't sleep, I did the bridge mod, then wired up a 50k pot to the 36K resistor that corresponds to VID1 (Voltage = 1 parameter) and a 50K pot to the 33K which corresponds to VID0.  Since I know someone may ask...I removed the stock resistors.  I set them both to stock resistances and noticed some odd behavior.  At 800Mhz it seemed that without the Voltage=1 parameter the pod would hash away, get no accepted shares, and accumulate hw errors.  At the same 800Mhz speed using the voltage=1 parameter the pod would hash away, get accepted shares, and still accumulate some hw errors.  Not as many as without the voltage=1 parameter, but still errors all the same.  


It could be that my pod is just going to throw hw errors due to some damage when the mosfet blew...so someone else may need to give the idea a shot and see how it turns out.

*edit*  - yep...even with the 2 50k pots set to the stock gridseed values of 33k and 36k, and the clock speed dropped back to 800Mhz it generates errors at a frequency of about 1 per minute.  Client side hashrate shows ~350kh/s but poolside shows around 327kh/s. 

Dude this idea in theory is sick! If this works then basically this gives people the option to run in scrypt only mode at 510-515kh

And then with a simple switch they can go back to dual mining... fantastic !! Best of both worlds.. has anyone tried this? This would be vmod5 if it works someone who is a pro at soldering should test this so they can easily revert back if it doesn't work.. this would be great for the community and for people with 100+ seeds that is a potential 1TH of btc mining power available at the flick of a switch

I heard of these fifo buffers but not sure where this is.. i am using cgminer and all i did with zadig is replace the usb with the winusb driver once... now everytime i plug the seeds in it automatically goes under usb in device manager and Thats it.. should i also do the fifo buffer thing? If so where do i go to find this setting and is there someone constantly updating cgminer where is the place to find the latest modified version...not sure if i have it or not... i dont understand why i remember ppl having to restart the miners every 24 hrs.. i have been tweaking and testing mine ao i have not set and forget it yet but because of that i may have not needed to restart the miners.. can someone tell me when i start to set and forget it am i goin have to restart every 24 hrs with cgminer?

I don't know if the voltage option is in cgminer 3.8.5.   I don't know programming but I did read through the gridseed driver code in cgminer 3.8.5 and don't see any reference to voltage options.  I see voltage options in cgminer 3.7.2 gridseed drivers but I don't think that is meant for dual mode mining.

1200 MHz - Rock steady at 508kh/s with no HW errors the last hour.  Letting it run overnight and then I'm modding my other 9 miners tomorrow. 49.9k 1% FTW!

Here's the idea I had....and right now it's just an idea...
Do the single bridge mod so that you can activate the higher voltage by using the switch voltage=1 in the gridseed options.  Then change the resistor that corresponds to that VID setting (which should be the 36k as referenced here https://bitcointalksearch.org/topic/m.5767028 on post #33) to the higher value you're looking for (47.7k or 49.9k or even maybe higher).

Then, should you wish to run stock voltage, you simply leave out the voltage=1 parameter.  If you wish to mine scrypt only with increased hashrates, specify the voltage=1 parameter and the higher clockspeed.

Finished my first mod and it wasn't as bad as I thought.  Miner working and has no HW errors and no rejects since I swapped in the 49.9k resistor.  Testing with an updated Scripta image now to see how fast she'll go without errors and will update.

What's the power draw with the 49.9k resistor mod? 

Still okay to make the fan (quiet please!) mod as well?

Cheers!