Couple different machines, one with 6 cards and my desktop with 1 card.  After about 30 minutes or so, NBMiner on NH restarts itself.  Comes back up fine and keeps mining, but I don't like the interruption even if its for a few seconds (It adds up!).  I recently switched off Phoenix Miner due to the post on twitter, and am getting frustrated with NBMiner.  I tried excavator, but the MH is like 1 less per card, and it has the same issue.  Randomly the miner will restart itself. Both rigs ran stable as hell before today.  Is this possibly on Nicehashe's end and not mine?  I figured due to so many people switching miners maybe thats why...but not sure.  Anyone else seeing this?

I actually have tried 3 different risers for this card, now that I think about it.  The 3rd being a riser that is running just fine in another rig, I really dont think its a riser issue.  Also I've tried powering the card in question with each of the two PSU's in the rig, no difference.  I swapped out the Add2PSU device thinking maybe that is somehow causing a weird power issue...no effect.

I just think its really damn odd this card's memory runs over 200mhz higher than the other 5 1070 ti's at the same exact power level. 

Thanks for the replies.

The motherboard is an Asus z270-a, same motherboard as in my other two 6 card mining rigs.  The PSU is dual 750 watt EVGA G2 golds, so there is plenty of juice for these 6 cards. 


Also someone mentioned the riser, I have tried two different risers and gotten the same exact result.  So I dont think its the riser.  My main question, if this card is causing the mining rig to crash, is how its running fine by itself in my desktop with these higher memory and clock speeds but it crashes when its put in the rig with the other 1070 ti's?  What could possibly be causing that

My 6x 1070 ti rig was having major stability issues, constantly crashing every few hours.  After a lot of troubleshooting I narrowed it down to the 6th card...whenever its plugged in the machine crashes.  I've tried different PSU cables, different risers, nothing helped.  I was trying to narrow it down to the GPU or the motherboard so I thought I would take the card in question and install it in my office desktop PC and mine with it from there.

So far, its been running over 24 hours no issue.  I was about to call the card good when I noticed something odd.  With no overclocks (for stability testing), my other 5 1070 ti's are running around 1650mhz on the core and 3802 on the memory at 80% power.  I glanced and noticed the one in my desktop is running around 1700 on the core and 4006 on the memory, still at 80%.

What gives?  Same brand and model of card, same exact power setting yet the card I had questions about is running faster than the other 5 on the core and the memory.  Even though its been stable in my desktop, could the issue still be with this card somehow not playing nice with the others?

Anyone ever seen this?  Thoughts?

Thanks in advance

This might be the most frustrated I have been in a long time.  I'm about ready to just resell the cards on ebay and make a profit and walk away, I can't for the life of me figure this thing out.  Feeling pretty down

Update - issue persists

So the issue is still not fixed, although I feel like I am getting close.  I would love some advice from this forum.

So I ran 1 GPU on each PSU for 48 hours, no issue.  Then I ran 2 GPU on each PSU for 48 hours, no problem.  Then I plugged in the 5th GPU on the PSU that also powers the motherboard.  I wanted to test the PSU that shoulders a bit more of the load.  I ran this for 48 hours, no issue.

I then plugged in the 6th and final GPU, which is powered by the 2nd PSU.  Crashed after 3 hours.  I changed out my Add2PSU for a different unit and started mining again.  Crashed after a few hours or so.  I changed out the VGA cable from the PSU to this GPU, crashed after while too.

I checked my event viewer and see:  Kernel-Power Event 43 (63).  I googled and a lot of people found this error ties back to the memory or PSU.  I ran a memtest, came back clean.  I have a new PSU on order, a slightly beefier EVGA G3 850 that I got a good price on.  

Anyone ever seen this error?  Am I headed in the right direction with my troubleshooting?

Thank you


*edit*  for the record I have tried 3 different risers as well

One more question, as I am no riser expert.

Is it acceptable to power two risers with one peripheral cable that splits into molex?  So the periph cable directly into the 4 pin power for two risers

Update -

So since its been running fine now for over a day and a half with the three cards without the splitters, I thought I would try to narrow down what card/splitter is causing me the issue.  I plugged in a 4th card and fired it up and started mining.  While I was updating NiceHash I was looking at the two remaining splitters, I noticed one of them had one out of the eight pins only coming halfway up, probably not even making contact with the cable out of my PSU, effectively running on 7 pins...or 7.5 pins at best lol.  

That was probably my issue all along, I hope at least.  It's a cheap fix, and in the future I will more carefully examine each cable.  It was a little difficult to notice, in my defense.  

For now I am just still running the four cards to play it safe and ensure stability.  I did email the vendor to try and get a replacement though.  

Thanks everyone for tips and advice along the way, I greatly appreciate it.  I will continue to update this thread though in case anyone else out there runs into a similar issue

Thanks for the reply.  Do you think I should try running a single 8 pin connector to the cards instead of trying to use the splitters?


Also as far as the add2psu adapter, the 3 cards I have running stable right now are split up between the two PSU's.  One PSU is currently powering the HDD, mobo, cpu, and 2 GPU's and 2 risers.  The other is powering 1 riser and 1 GPU.  So they are both powering things right now just fine, so I would THINK that the psu adapter is ok, but I cant be 100%

Update -

So I have been running 3 cards just fine for coming up on 48 hours, so I'm pretty sure the rig is stable and my issue revolves around the power somehow.


As I explained before, the Zotac 1070 ti Amp Extreme requires 2x 8 pin power, and my EVGA 750 watt G2 Gold's only have 4 VGA ports each, so there isnt enough to run cables directly to each card.  I have the three running now powered directly to the PSU's, but the other 3 I had VGA splitters. 

I had a cable from my PSU connected to one of these:

https://www.amazon.com/gp/product/B07611QXG4/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

Then that would power a card.  I am new to this so bear with me, is this a no-no?  Or did I just possibly get a bad splitter?  Im fairly certain the system freezes I was having was due to these splitters in some fashion. 

Thanks for any tips! 

The cards would be powered from the PSU, not via the risers themselves

Sorry I should have been more clear.  Power draw from the riser power connector

Thanks! 

Having trouble finding a good estimate for the power draw on a riser.

Thanks! 

I think the RAM stick is fine.  Like I said, this system ran fine for a couple of weeks with just the single PNY card before the other Zotac's showed up.  I would think if the RAM was bad I would have seen the problems before I installed the rest of my GPU's

I think you may be on to something with the power aspect.

So last night I swapped out all my risers and changed virtual memory to 16gb.  I started mining and went to sleep.  I woke up and the machine was frozen up again.  The 1070 ti Zotac AMP EXTREME cards require two 8 pin connections, so I was forced to buy these adapters:

https://www.amazon.com/gp/product/B07611QXG4/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

I ran those adapters for 4 cards.  I unplugged all four of those cards and just ran the two cards that I am running without adapters, nearly 9 hours of up time so far.  It has not locked up today.  I think 1 or more of those splitters might be bad.  

About to head home and tinker, any last thoughts?

I think I will swap out all my risers with this other set I have and increase the virtual memory size.  Also I will check every connection to make sure its seated properly.

I have these risers:

https://www.amazon.com/gp/product/B077JYBDYT/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1

I use the 6pin to sata adapter.  I power only 2 risers with each sata cable from my PSU, as per the norm.  My 1060 rig uses molex adapters and I never tweaked virtual memory on that PC and its fine.  Do you think these 6 pin adapters are requiring it though?

Using Nicehash miner, sorry I should have included that.  I haven't done much to background processes and I haven't tweaked virtual memory.  I have a 6x 1060 rig that's stable as a rock, I never did anything to the virtual memory on that one either.  Is it worth a shot? 

Rig:

5x Zotac Amp Extreme 1070 ti
1x PNY Dual Fan 1070 ti
2x EVGA G2 Gold 750 using the Add2PSU adapter.  One PSU powers 3 cards and all the risers.  The other PSU powers 3 cards and the mobo/SSD
4gb Ballistix DDR4
Asus Z270-A
Intel Celeron CPU
120GB Adata SSD
Windows 10 64bit
Nicehash Miner



So I initially got this rig without the other 5 Zotac cards so I just set the motherboard on a box and used the single PNY card for a couple of weeks while I waited for the backordered Zotacs.  Once I got a stable OC on the card, I ran the system without issue with the card plugged straight into the motherboard, no riser.  

Last Thursday I got my other 5 cards so I fully assembled the rig.  I got all the components in the frame and all the cards on the risers.  Booted up fine and I got all 6 cards detected by doing the bios mods for this mobo that are on youtube.  Everything looking good I thought.

I put a mild OC on the cards and started mining.  About 12 hours later the machine was frozen, locked up.  I rebooted and halved the mild OC to just +100 core and +200 mem.  Started mining again, froze.  Ok...so I did no overclocks at all, stock speeds.  80% power in MSI afterburner this whole time, FYI.  Started mining again, froze up in just a few hours.  What the heck?  Then I tried one more time, stock speeds but this time 90% power instead of 80...although 80 should be just fine especially with no OC.  Froze after 10 hours.  

I don't get it.  I'm pretty sure my motherboard and RAM are fine, considering the machine ran for a couple weeks with no issue when I just had the single PNY card.  I have 6 extra risers for a new 1050 ti build I have coming this week, should I try swapping out the risers and see?  Anything I'm overlooking here?  

Its so frustrating to see your rig frozen up on your dashboard and you are helpless at work. Sigh

I have 2x evga 750 g2 to power this 6x 1070ti build.  I was planning to run 3 cards off each PSU.  

I guess I'm looking for the best way to power these dual 8 pin cards