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Collatz Conjecture project support thread - Page 30

post #291 of 521
Quote:
Originally Posted by Lays View Post

Ok if I go by that, it's about 46.5-47.1 seconds per run, so let's call it a 47 second per WU, then if I do 60/47 that's 1.276, then I seem to be getting anywhere from 3700 to 4150 points per WU, so let's average that at like 3850, so 1.276*3850 = 4,914 points per minute, then 1440 minutes in a day 1440*4914 = 7,077,446 points every 24 hours, if no server downtime / any issues on my PC?

Not sure if I did that right lol

You will find that as you crunch faster the credit per WU drops a little bit each second you get faster. Don't know why this is but it isn't going to change.
that is why the 1080 is only a little bit faster/slower than the 7990. A tahiti does a WU in 1:40 or 100 seconds but it is doing two at a time so the individual time is 50 seconds per WU.

When you factor in the few seconds overhead of swapping WU, the 7990 overall is a few seconds faster. (at relatively normal clock speeds)

At high overclocks/power levels, a 1080 will match a 7990 WU for WU. but so will a 980Ti (almost {chuckle})

The 1080 is a great card and with Nvidea dropping cuda development for OpenCL, makes them just as good as the AMD cards at what used to be AMD dominated projects.

It's why when the time comes I will switch to them, besides, I can get three of them in each machine I currently have. biggrin.gif

Welcome to the forum, Enjoy put your feet up, grab a beer if your so inclined and set a spell....... thumb.gif

GO TEAM! sonic.gif
post #292 of 521
cheers.gifbiggrin.gif

I'm running at 1110 clock and 1750 RAM and running units in 94-97 seconds. The PCIx2 slot card is about three seconds slower. Temps are running 72/66 and 63/59. The outside card is able to get a lot more fresh air after I cut the bottom HD brackets out (Air 540). I'm lovin' these cards! Can't wait to to the triple setup up and running. Got the open air case today. Got to put it together and paint it before I assemble anything.thumb.gif
Edited by 4thKor - 10/3/16 at 2:27pm
post #293 of 521
I'm down for a bit. Got the X8DTH going with two cards, put the third in, and it's not recognized. Doing a re-install of Windows since it never would update. In my attempts to get everything going I corrupted files and couldn't re-boot without errors. Hopefully updates will go through in a timely manner.
post #294 of 521
Quote:
Originally Posted by 4thKor View Post

I'm down for a bit. Got the X8DTH going with two cards, put the third in, and it's not recognized. Doing a re-install of Windows since it never would update. In my attempts to get everything going I corrupted files and couldn't re-boot without errors. Hopefully updates will go through in a timely manner.

Hey brother, I'm sorry to hear this.

I've been gone for a couple of days.You are not going to be able to run three of these cards on a single machine.

Not possible, not for Boinc . You CAN run three of these on scrypt mining if that is even worth it anymore, but not for crunchin a project..

Mining accesses the GPU directly, not through the op system. Boinc has to use the operating system which means the AMD limitation to 4 GPUs is enforced.

Believe me I tried it a few years back. unless someone has come up with a workaround the last couple of years, AMD cards are limited to 4 cores in one machine when Boinc accesses the driver through the op system.

Hard limitation no way around it. (unless you have newer information I do not know about. Most miners I believe limit themselves to two 7990's and three single cards)

If you learn how to do it brother, please let us all know....
post #295 of 521
This blows my plan for world domination! redface.gif

Back up and running with two cards in my original setup.

Now to turn to Nvidia. I shall rule the world! sneaky.gif

tongue.gif
post #296 of 521
Collatz has apparently unleashed some new tasks. I can't keep the 7990's stable under 1.11v. I've tried re-loading drivers and Afterburner and get the same results. Driver crash and task failure at anything under that. Tried increasing Power Limit and that doesn't work either. Am I doing something wrong? headscratch.gif
post #297 of 521
Quote:
Originally Posted by 4thKor View Post

Collatz has apparently unleashed some new tasks. I can't keep the 7990's stable under 1.11v. I've tried re-loading drivers and Afterburner and get the same results. Driver crash and task failure at anything under that. Tried increasing Power Limit and that doesn't work either. Am I doing something wrong? headscratch.gif

Stay .05 volt above the core....

Then work downwards towards optimal. You were running at 1110 core, so start at 1.160 volt. Power limit in AB doesn't do much for an AMD card.

Always stay a bit above the core with the voltage....
post #298 of 521
I've dropped 'em back to 1000 mhz and 1.060 volts.

BTW, figured out why GPU usage wasn't showing. Un-check "Enable unified GPU monitoring". thumb.gif
post #299 of 521
Quote:
Originally Posted by 4thKor View Post

I've dropped 'em back to 1000 mhz and 1.060 volts.

BTW, figured out why GPU usage wasn't showing. Un-check "Enable unified GPU monitoring". thumb.gif

Thank you for that, I totally forgot about that one.

Let them settle in for a few hours before you start them back up the optimization curve.....

I"m running mine in full tower cases so mine are set up thusly....

7990 #1 the upper GPU is the hot one and 7990 #2 is the lower one which gets the freshest air.

1110 core at 1.165 volt and 1750 mem clock just like you set yours with GPU #1 as master. (excellent starting point BTW)

7990 #1 would run hot (>85) at those settings and #2 would run cold. (<65)

So, #1 has to go down and #2 up.

Take them out of master and slave mode.
I drop the #1 card down to 1000 core and 1.050 volt and come back to it later. (runs WU right at 2 minutes) then I go as high as I can go on the #2 card (GPU 0&1 in AB, why AB is backwards like that I haven't a clue)

In my machines, Card #2 will go to the max 1200 core at 1.200 volt on both GPU's and run at <75 degrees, 20% overclock at stock voltage 1:36 per 2 WUs (good air does wonders)
Card #1 gets tweaked upwards individually, keeping the core below the voltage until I reach 80 degrees then stop.

The various machines and cards in #1 position are all over the map as far as settings and temps go. 1 GPU will only go 2.5% overclock 1025 core and 1.075 volt before it goes unstable. But another (in another machine) is running at the initial settings still 1110 core at 1160 volt and staying under 80 degrees.

So i manipulate them to keep the average WU times on the machine as close to 1:40 and under 80 degrees as possible.

Card #2 the free air card will run to it's max right out the gate, It is card #1 that is the finicky one. Get clear air to the #1 card and the problem goes away, you can run it full bore...

But you know this already... smile.gif

But, basic rule of thumb, driver bails, up the power to the offending GPU, you know which one it is cause it will reset itself to 1.200 volts in Afterburner.

Card quits or computer shuts down, lower the core clock.

Bumping the voltage up causes the card to exceed 80 degrees, lower the core clock and voltage. (or revert the voltage to previous if it was the last bump)
post #300 of 521
Not sure what the deal is, but I can't get these things over 1000 mhz anymore. Set the slider to 1050 with voltage at 1.100 and hit apply and they go up for a brief period and clock right back to 1000. The voltage also immediately spikes to 1.200. The only way to get the voltage back down is with a re-boot. Even tried to get higher clocks after the voltage spike and no luck. Have installed and re-installed drivers and AB several times with same results. I'm at my wits end. Was running 1100 mhz on all four GPU's before at 1.060 volts. Verified that with GPUZ.

Finally figgered it out. Didn't have unofficial overclocking mode enabled. thumbsupsmiley.png
Edited by 4thKor - 10/9/16 at 1:16pm
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