When being in the top ten at Milkyway was not enough...another HD 7990 was added

Vester

Well-Known Member
USA team member
Yesterday, I had another lockup after almost four days of continuous running. I had another lockup this afternoon. Since I do not surf the internet on that computer and don't want to lose crunching time, I needed a way to monitor it from the next bedroom. Solution? I am playing music from a USB drive and will investigate if the music stops. I may get tired of Wynton Marsalis in a few days.

I suspect that the bargain OCZ 1250 watt power supply that I bought on eBay is the problem, but I don't want to run just two video cards on the other power supply to find out. (Wishing I had an oscilloscope.) I am considering a 2200 watt power supply, but I will have to get my brother, an electrician, to install a 220 volt 20 amp (NEMA-6) outlet in the front bedroom. It will save electricity, too. (Remember to tell Pam! I am glad I bought her a new Kindle Paperwhite just yesterday when her Fire failed!)
 

Nick Name

Administrator
USA team member
Hopefully you have been able to determine the problem. If not I would try running the latest card by itself and see if the problem is still there. If not then your guess about the PSU is probably right.

If you're now tired of Wynton Marsalis, check out Controlling BOINC Remotely. You can monitor the computer from another machine. You might also check out BoincTasks which is designed to monitor multiple BOINC machines / clients.
 

Vester

Well-Known Member
USA team member
Our small church is meeting at our house this afternoon for supper and Bible study. I have turned off my mining rig to reduce the load on the air conditioning system because the heat index is predicted to be 105 F and the large sunroom where we meet is on the west side of the house. I know you feel my pain. I haven't managed to run 24 hours straight for a few days (not due to lockups). On the bright side, I have AT&T fixed wireless internet since Saturday and Speedtest showed 79.55 Mbps down and 24.60 Mbps up.
 
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Vester

Well-Known Member
USA team member
I am running just two of the three video cards while troubleshooting. This will take a while because some of the lockups took three days to occur. I hope to be back at full power soon.
 

Vester

Well-Known Member
USA team member
I put the third card back in service yesterday after removing the latest Radeon driver and installing the Blockchain Beta driver.

We got our power bill in the mail yesterday. It has been really hot here, we had about 25 people here on three occasions, and we have swimming pool pumps. The bill was about $100 more than last month at $351 and change. I started to turn off the cruncher to save power, but my wife, Pam, said, "Don't do that. You like your hobby." Guys and gals, that is reason 1001 that I love my wife!
 

Nick Name

Administrator
USA team member
I put the third card back in service yesterday after removing the latest Radeon driver and installing the Blockchain Beta driver.

We got our power bill in the mail yesterday. It has been really hot here, we had about 25 people here on three occasions, and we have swimming pool pumps. The bill was about $100 more than last month at $351 and change. I started to turn off the cruncher to save power, but my wife, Pam, said, "Don't do that. You like your hobby." Guys and gals, that is reason 1001 that I love my wife!
And I thought mine was high! :eek: Congrats on finding a great wife and compliments to her as well for her good judgement. :D
 

Vester

Well-Known Member
USA team member
Lessons re-learned:
1. If you have just changed something to improve your computer's performance, don't leave the house. I lost about an hour and a half at Wow! Event. Seti.
2. Change one thing at a time so you will have a clue what didn't work!
 

Vester

Well-Known Member
USA team member
My rig is back online after I shut down in August due to heat (weather) and frustration with lock-ups. We had four months of summer weather here in Upstate South Carolina and the heat wave finally subsided about two weeks ago. I relocated the rig from a bedroom to the laundry/storage/back foyer room where the air conditioning return air vent is located. That is an ideal location for cooling, and it is about 12 feet from the power panel. I do not like running two power supplies and having input power loads on the order of 1050-1100 watts on 120 volt outlets. Since I have extra 240 volt breakers with no load (I converted the dryer and hot water heater from electric to gas), I want to put a 240 volt (1600 watts or more) power supply in the rig. I will get my brother, an electrician, to wire the 20 amp outlet for me.

Tuesday, I did a clean installation of Windows 10 Pro, updated, and installed only HWMonitor and the latest Radeon drivers before installing BOINC. I am running 7 work units per GPU on six GPUs (42 work units at a time). It boggles my mind.

The 1250 watt power supply is struggling to pull just one of the three video cards. I have the motherboard and two video cards on the 1000 watt power supply. If it would just quit, I would expedite getting the 240 volt power supply. Edit: I ordered a 2000 watt power supply and it is coming by slow boat from China arriving sometime between Thanksgiving and 4 January 2020! I also ordered a NEMA 6-20 power cord.
 
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Nick Name

Administrator
USA team member
Great to have you back crunching. I've never tried dual PSUs for the same system, I'd rather split that sort of load up into two separate systems.

A 15 amp 120 volt outlet can supply 1800 watts, although you wouldn't want to draw that continuously. You're well below that so you shouldn't have any problems unless the outlet or wiring is really old. 240 volt will definitely improve the power efficiency though. I plan to eventually run at least one 240 volt for my main system.

I don't know how well it would work on those older cards but I've had pretty good success reducing clocks and voltage on AMD cars from the RX 480 series up. Performance doesn't suffer much but it saves a fair amount of power.

Those shipping dates from Ebay are worst case scenario, I've usually gotten it within three weeks and never longer than a month.
 

Vester

Well-Known Member
USA team member
This is a mining rig motherboard (ASUS B250 MINING EXPERT) with three 24 pin connectors for three sections that have 6 PCIe x1 connectors in each section. My main problem, as I see it, is that I am supposed to fill the PCIe x1 slots in one section before going to the next section served by the second power supply. Getting a single 2000 watt power supply eliminates that possible problem, and it allows me to run the power supply loaded about 50% of peak power (which is a good practice). I look forward to getting the third video card online again. You have to admit that the US $46.81 price of my power supply is super cheap!
 

Vester

Well-Known Member
USA team member
We will go higher!

I just added my third HD 7990 and the rig is running fine. I decided that I did not need to connect the second power supply to the motherboard's second 24 pin connector. I removed the connector at the motherboard and installed a daisy chain connector that I had bought last spring.

I will install the 2000 watt power supply when it comes to save power.
 

Vester

Well-Known Member
USA team member
The 2000 watt power supply was cancelled by vendor. The current setup is working fine with the power supply adapter and the rig is running on about 100 watts less power than before, now about 950 watts.

I am having internet connectivity problems and my output will suffer until the AT&T Fixed Wireless service is restored. I am using my phone as a hotspot, but the computer keeps dropping the connection.
 

Vester

Well-Known Member
USA team member
The AT&T technician installed a new fixed wireless antenna and a new router today. It was not easy to keep my computer running Milkyway on my smartphone's hotspot for three days.

We should be able to get into 8th place with our current fleet, but it would be nice to have some more Radeon VIIs join us.
 

Nick Name

Administrator
USA team member
Internet problems can be very frustrating especially when it's completely out of your control. I pay way too much for my connection but I will say it's been very reliable over the years with just a few major hiccups.

It would be nice to get some more horsepower but this is the first time I can remember that we've been this high. I just hope my VII lasts a few years.
 

Vester

Well-Known Member
USA team member
USA is in 8th place and I have enough crunching power to get us past SETI's current RAC. Of course I would like more of our members to run Milkyway so that we can also pass L'Alliance Francophone (6th) and BOINC Australia (5th).

 
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