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So a day of TZC mining went just went, no issues. Here are my current OC settings:
Power Limit: 73
Temp Limit (linked to PL): 71
Core Clock: 0
Mem Clock: 620
Fan: Auto
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Sorry, I am confused. You said you have 4 GPUs - (4) MSI 1070 GTX 8 GB GPUs, now 6.
Try to disable memory overclock, see how it goes for a test.
Sorry didn't mean to confuse  My end goal was to eventually have 6 in total. That's what I sized my MB and PSU for. The rig CURRENTLY has (4) 1070s. I'll see how it looks when I get home from a day of mining. I'll give the clock test a try later. |
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Unless you live in the desert, even with MPPT, the voltage won't be stable enough. The moment a cloud hits a panel, you're going to see voltage swings without a buffer. If the 5-8% loss is of that great concern, having a battery as a voltage buffer is the safest way of doing it. Not to mention the PSU and GPU don't keep a stable draw, it varies constantly. The MPPT needs something to power track against. If both the power source and load are constantly varying, that's not the best.
I think the OP is on the best route. Operating large solar systems at 12V is NOT cost effective. The cable sizing required to bring the amount of amps from any length of distance at 12V is outright impossible and certainly not cost conscious. Keep in mind there are MANY factors in the overall efficiency of a solar system, cabling and inverter are certainly big ones. Having the solar system bring in the high voltage (the whole point of strings) and invert it (that inverter is likely 98% efficient) to clean 120VAC is worth the few % lost.
I was a solar designer and installer for almost a decade and the question of can I do this right off the panel came up very often. I have a very similar mining/solar set up myself.
The normal PSUs running from the mains hold the voltage constant. The hacked PSUs (that accept on the order of 300V DC and perform MPPT) just take load off the normal PSUs when solar is available. Could also just tap into the primary side DC bus with one set of PSUs but then the solar setup will have a connection to mains, probably causing problems when connecting many PSUs together. For my setup, I can (and have) run it without a battery if I add a PSU with a series diode, connecting it where the battery would normally go. It just wouldn't be efficient at using the solar panel since the miners only use 16W or so and the 100W panel almost always makes more than that during the day. Correct which somewhat defeats the purpose of Maximum Power Point Tracking. The battery will store the energy that otherwise just turns into heat. If you're not utilizing the potential of the panel at all times, you're wrecking your ROI versus what you get off the grid. Also if you're doing this off a 12 volt panel and using it at a 12v power supply, you're artificially dragging the voltage down using the MPPT (unless your input tolerance is way higher). This makes cabling costs and voltage drop an even bigger factor and a full stop for anything larger than 1000W. |
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Have you tried putting 1 GPU directly on the MB, the rest 3 only on raisers?
How much do you Overclock the memory?
No because the 1070 it block one of the PCI slots so I could only put 5 cards in instead of 6. What would be the benefit of doing this? I'm open to it at this point. I do overclock, around 620 on afterburner. I also jumped power limit to 75 this morning to see if that would help. |
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What's coming down from his panels aren't 12V, they're likely strings somewhere in the 150-300V range. Even individually, larger panels like this individually are above 25V themselves. Not to mention the solar power isn't constant enough; you'd be varying input voltage constantly. You need the inverter to smooth it out and make it a clean and stable power.
Hack some cheap server PSUs to perform MPPT, then parallel the output with unmodified server PSUs to get a constant voltage. Hack the load share to give preference to the solar PSUs, with the normal PSUs supplying the remainder. It will take a lot of electronics knowledge to do it. Unless you live in the desert, even with MPPT, the voltage won't be stable enough. The moment a cloud hits a panel, you're going to see voltage swings without a buffer. If the 5-8% loss is of that great concern, having a battery as a voltage buffer is the safest way of doing it. Not to mention the PSU and GPU don't keep a stable draw, it varies constantly. The MPPT needs something to power track against. If both the power source and load are constantly varying, that's not the best. I think the OP is on the best route. Operating large solar systems at 12V is NOT cost effective. The cable sizing required to bring the amount of amps from any length of distance at 12V is outright impossible and certainly not cost conscious. Keep in mind there are MANY factors in the overall efficiency of a solar system, cabling and inverter are certainly big ones. Having the solar system bring in the high voltage (the whole point of strings) and invert it (that inverter is likely 98% efficient) to clean 120VAC is worth the few % lost. I was a solar designer and installer for almost a decade and the question of can I do this right off the panel came up very often. I have a very similar mining/solar set up myself. |
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And the blinking/red screen is back. Now I'm truly frustrated. ASRock has offered to RMA my board but frankly that would mean my rig is down for weeks. Any suggestions  |
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Have you thought about finding a way to feed the DC from the solar panels directly into the 12V consumers and bypass the two transformation stages?
That could potentially give you another 10 - 15% more net power by reducing losses. I know they do things like that in large datacenters sometimes. Unfortunately, 12V PSUs are still not mass produced and therefore expensive. However, compared to high end consumer PSUs and solar panels, it may be very profitable. You could perhaps implement it by using some properly dimensioned battery bank like an UPS and then add some custom wiring to the GPUs.
What's coming down from his panels aren't 12V, they're likely strings somewhere in the 150-300V range. Even individually, larger panels like this individually are above 25V themselves. Not to mention the solar power isn't constant enough; you'd be varying input voltage constantly. You need the inverter to smooth it out and make it a clean and stable power. |
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*UPDATE* Replaced the riser in question. I've been stable in mining ETH for the last hour. No blinking!!!  I'll report back if anything changes. |
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Well I'm back up to 3 cards again without distortion. I plugged in the 2 cards not functioning prior, one at a time, and found one being the problem child. I'll replace the riser on that one tomorrow and see if that does the trick. Do you only have one system you can test these on? If you're planning to continue mining and will be adding more cards in the future I strongly suggest to build some kind of a test rig. Doesn't have to be anything fancy, an old system with just one pci-e slot and some simple PSU will do just fine. Whenever you have some issues with your main rig(s) you just pull the parts in question and install them into that test rig to find the source of the problem. Having a spare rig like this simplifies the diagnostics greatly. Currently yes this is my only rig besides my very simple desktop doing BOINC. I was using my mining profits to grow my equipment so I'm at this point now since this summer. Well I threw some extra at it but you get the point. I think that's a very good idea to have a test rig before installing in the main one. Would definitely point out problem hardware prior to bringing it online. |
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Well I'm back up to 3 cards again without distortion. I plugged in the 2 cards not functioning prior, one at a time, and found one being the problem child. I'll replace the riser on that one tomorrow and see if that does the trick. |
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I just want to say I think it's awesome we have someone tied to the coin (Chekaz) here helping on the forum. I think that adds a lot credibility to the coin.
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It seems unlikely that both are bad, so what would you guys check next if swapping out the risers doesn't work?
I'd thoroughly check the GPUs. You said in your 1st post that "Each GPU works individually", but did you test them each with a display attached? It's just whenever there are some graphics glitches (and you said there was some blinking and color artifacts) there's always a chance that the actual GPU is the problem. Correct, NVIDIA asked me to do exactly that. I ran the system 1 card at a time using the HDMI outputs and they all functioned normally. Tech support said it was very likely not to be the GPUs but I'm not going to rule it out until this is fixed. |
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because I just had this issue with my mining rig last week, my money is on a bad riser.
I used MintCell on amazon and powering with a PCIe cable from PSU and fixed all my issues.
I'm going to try turning on turning on another GPU tonight and see if the issue happens. Then when the next 2 arrive I'll swap out what I can. It seems unlikely that both are bad, so what would you guys check next if swapping out the risers doesn't work? |
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Answered in order: My PSU has enough individual outputs on it that I run a separate cable from the PSU to each GPU. I felt this would be the safest way to avoid voltage drop despite the snaggle of cables. I'm getting tempted to see what voltage each one is seeing. At this point, I can't even get past the Windows login screen with 4 GPUs on let alone changing my undervoltage levels  I sure hope so! I picked the 1000W unit as I thought it would be enough to max out the MB with PCI slots. The highest draw I've seen at 72% is roughly 575W at the wall using a Kil-o-watt meter. I don't believe so but I'm sure I can check. The MB comes with 1 x PCIe 2.0 x16, 5 x PCIe 2.0 x1 I'd have to assume it was stock 2.0. Hell I didn't even know that was a selectable thing, figured it was a hardware protocol. Well if it locks out even before you enter windows that's odd indeed. Which version are you running ? W10 Enterprise patched anniversary ? I don't think gen1 would help, but doesn't hurt since it save up a bit of watts (5 to 10) Also the 1070 you use have 6pin + 8 pin power input, did you powered them both with different cables right ? Windows 10 Pro-Version 1703 Negative; I have a single PCIE cable coming from the PSU that branches into the 6 and the 8 Pin. Is that incorrect? |
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Ok sound like your setup is ok,
How do you power the 8+6 pins gpu power input ? 1 cable with a Y separation ? 2 cables ?
Have you tried to use for example 60% powerlevel ? does the issue happen before mining or at mining start ?
Your psu should be enough, with this configuration you should reach about 650w at wall.
Maybe a bad riser, but it seems odd it crash the rig completly. Are you using gen1 pci in motherboard bios ?
Answered in order: My PSU has enough individual outputs on it that I run a separate cable from the PSU to each GPU. I felt this would be the safest way to avoid voltage drop despite the snaggle of cables. I'm getting tempted to see what voltage each one is seeing. At this point, I can't even get past the Windows login screen with 4 GPUs on let alone changing my undervoltage levels I sure hope so! I picked the 1000W unit as I thought it would be enough to max out the MB with PCI slots. The highest draw I've seen at 72% is roughly 575W at the wall using a Kil-o-watt meter. I don't believe so but I'm sure I can check. The MB comes with 1 x PCIe 2.0 x16, 5 x PCIe 2.0 x1 I'd have to assume it was stock 2.0. Hell I didn't even know that was a selectable thing, figured it was a hardware protocol. |
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Do you use self-powered risers ? did you connected the additionnal molex power connectors on each side of the PCI-express slots on the motherboard ? What powerlevel you use ?
I'm using these risers: https://www.amazon.com/gp/product/B06XGTM694/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1I'm using the molex connectors that came with the PSU; each cable feeds 2 risers. Then each GPU has it's own dedicated cable back to the PSU. I also do have both molex connectors attached to the MB to stabilize PCI at the voltage per ASRock instructions. I normally sit around 72% power with the Afterburner. I've got 2 more risers coming that I'll try swapping out of the non functional GPUs tomorrow. |
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Hey all,
Last night my screen began blinking on and off with some red pixelation. It became so bad that eventually there was more screen off time than on.
What was going on before that? Has this rig been happily mining for days/weeks/months, or is it a new system you've just built? I started back in late august with just (2) 1070s. At that point, it ran well. When I added on the 3rd, I did notice some minor blinking on occasion when I probed the overclock limits of each board but went away after a restart and toned back Afterburner. After the 4th GPU came on board it started happening more frequently but again was fixed with a restart. As of last night, the restart no longer worked which is when I started going over everything, cleared the drivers, and went to NVIDIA. |
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Hey all,
Last night my screen began blinking on and off with some red pixelation. It became so bad that eventually there was more screen off time than on. I contacted NVIDIA tech support thinking it was a GPU issue and after 3 hours of chat tech support with them on my laptop, I gave up and went to bed. Here's what I know in a nutshell:
1) I have a Corsair HX1000i PSU, ASRock BTC H81 MB, 8 GB ram, (4) MSI 1070 GTX 8 GB GPUs, and a celeron cpu.
2) NVIDIA tech and tried musical chairs with the riser seating (BTW they said USB risers are NOT supported by these boards) to no avail
3) I have flashed my BIOS and updated the GPU drivers to the latest
4) Each GPU works individually
5) No issues found in msinfo according to NVIDIA
4) Currently I have (2) cards up and running. As soon as I add in the additional cards, the problem comes back.
This leads me to think there's either a MB issue (I have a help request to ASRock), a power issue, or a riser issue. I really despise not knowing where to take it from here and having essentially have $1K sitting around doing nothing. Anyone that can help me get up and running I'll even send a token of my appreciation. If this is in the wrong topic area, I apologize in advance.
Thanks
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I sent an email request to get CoinGecko to list your coin for price look ups. Thanks for the hard work TZC team.  |
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