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Posts by Bralle

1) Message boards : Number crunching : Problem with tiny cache in MW (Message 33804)
Posted 27 Nov 2009 by Bralle
Post:
Some numbers for you.
Running quads on my 2 main crunchers.
One quad needs 3 hours +- per core for one milkyway WU, with a total of 24WUs with work, thats 18 hours of work in total for that batch of 24WUs.

My ATI 3870x2, which isnt fast compared to the 4000 and 5000 series, can do a WU in just under 2 minutes, with 2 cores that adds up to 1 WU per minute.
now, with 24WUs in cache thats a stagering 24 minutes of work.

Now, some of you say that we need that flow of steady WUs to return to generate more work, well, cant we atleast get "up to" a 3 hour cache on GPUs atleast ? or even better, full 18hours ?
If a CPU uses 18 hours to complete its batch, a gpu shouldnt slow down anything by having a larger cache, times 4-6-8x.

If the problem is not enough work, then I would like to know if its not possible to generate more work, 2-4-6x the current work ? or is this humanly impossible ?

And stop using the "credit Whore" comments all the time, ofc credits is a big driver, but in the end, we want loads of work to do. We mainly here for the science. And its your job to keep us fed with WUs :)

2) Message boards : Number crunching : Server Crash November 10 (Message 33325)
Posted 17 Nov 2009 by Bralle
Post:
Travis:
I read in the forums recently that you had a number of hard drives damaged due to construction around campus. To reduce the damage to the hard drives, have you looked at shock-mounted external hard drives or shock mounted hard drive internal cases?
See link:
http://www.quietpcusa.com/Smart-Damper-Hard-Disk-Drive-Antivibration-Mount-P525C3.aspx

Anti-vibration hard drive cases will protect your new hard drives on order.


I use these : http://www.coolermaster-usa.com/product.php?product_id=2814

fit 4 HDDs in this baby, with A 120mm fan, and anti vibration :) should fit any 3x5.25" slots :)
3) Message boards : Number crunching : 3rd.in - optimized apps (Message 31502)
Posted 25 Sep 2009 by Bralle
Post:
Guess you have Crossfire disabled. With the newer drivers it's generally okay to run it with activated crossfire so both GPUs can be used.

What, they finally got around that issue? And your 3870x2 (which I seem to remember has both connectors on one GPU) is using both fully?

If so, that's great news for those who haven't just sold their x2 cards (d'oh!)


I was running both gpus on COLLATZ earlier. But dont work on milkyway. 2 WUs on 1 gpu currently
4) Message boards : Number crunching : 3rd.in - optimized apps (Message 31501)
Posted 25 Sep 2009 by Bralle
Post:
Running Boinc 6.10.7 with CCC 9.9

ATI 3870x2,
2 WUs was Crunching
only 1 of the GPUs was running
What can be the cause of this ? any tips ?

Guess you have Crossfire disabled. With the newer drivers it's generally okay to run it with activated crossfire so both GPUs can be used.
If you want to use both GPUs without Crossfire, you have to connect a monitor (or dummy plug) to the second GPU (HD3870X2 have 4 connectors, 2 for each GPU). It can be the same monitor you have already on there, just connect it with DVI and VGA for instantance. To be sure, you should extend your display to the second monitor.


There is no "disable option" in CCC for this card, tho I can put cayalyst A.I to "disable - standard - advanced" This disable will make crossfire not activate, standard and advanced will activate it and start using 2nd gpu when running games. But I have yet to see the 2nd gpu active in boinc. :/ have also connected a 2nd monitor to check things out now, and still, gpu 2 is idle. CCC clocks the core from 850 +- down to 297 when idle. And it stays there until I start a game.
5) Message boards : Number crunching : 3rd.in - optimized apps (Message 31473)
Posted 24 Sep 2009 by Bralle
Post:
Running Boinc 6.10.7 with CCC 9.9
Have tried earlier versions aswell.

Here is my problem : running ATI 3870x2, installed the latest application from you guys, started up boinc, and got some WUs to work with. 2 WUs was Crunching when I noticed that only 1 of the GPUs was running, CCC and rivatuner says gpu 2 is idle, but nr 1 working its magic on the 2 running WUs. Read up and down and cant see anyone with same problems.
What can be the cause of this ? any tips ?

//bralle





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