Quote from: klondike_bar on November 16, 2013, 04:30:07 PM

Quote from: cypherdoc on November 16, 2013, 04:13:45 PM

Quote from: Xian01 on November 16, 2013, 03:56:38 PM

Quote from: cypherdoc on November 16, 2013, 03:49:02 PM

what did you do to get them going at that speed?
anyone have a recommendation for a voltmeter?

Played a game of "musical h-cards" where I ran the rig for about 5 minutes, took note of which cards were faster than others, shutdown, moved the faster cards to the front, and slower cards to the back, restart, etc.

Also, FANS FANS FANS ! Lots of airflow ! These guys really need to stay cool and ventilated.

http://www.amazon.com/gp/product/B005EK3NRS/ is what I'm using to tune my gear.

nice job. i think i can do that.

why did you need the voltmeter then?

check the voltage on the cards when running to determine how to best tune the trimpot.
0.78V is about as low as you should go, even without heatsinks
0.8-0.83V is good if you have reasonable airflow and no heatsinks
0.84-0.88V is good if you have reasonable airflow AND heatsinks
0.9V-0.95V if you have LOTS of airflow and heatsinks. might be hard to get this high if you have more than 8 cards in the rig due to the close proximity of eachother's heat

is there a pic showing the exact placement required of the probes during measurement? so you measure while it's powered up? how do you get to the boards in the middle like slot 9?