gigabyte 990fxa-ud3 running 6 cards or 4 cards?

[mrkubanftw]

Hey guys a I have a nice Gigabyte gigabyte 990fxa-ud3 with an AMD Fx-8350 and 16Gb of dual channel XMP memory. I am trying to get a hold of a few nice radeon cards, currently im picking up a HD6870.

Question one, iv seen what theoretical hash rates are but what are some real numbers you guys have mined with?

Second has anyone ran 4 cards in this board? How about 6? Obviously the more cards i can stick in one machine the less machine i will need to run.

Any input appreciated guys!


p.s. I ordered a 50gh/s from butterfly labs a short while ago. Assuming I ever get it... I will ultimately move to litecoin or namecoin with this rig once asic destroys bitcoin any forseeable issues with that? I know next to nothing about litecoin or namecoin except one thing i read that asic cannot process them which makes them a last hope for gpu i guess.

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[batman, not crabman]

I've got one and can only get 4 cards to work.  I get ~1.8 MH/s mining litecoin, your mileage may vary.
All cards are 6950s (different brands), 3 are flashed, all are overclocked in cgminer which also underclocks if they get too hot. Stock voltage.

I tried a 5th card, it booted but I couldn't get it to mine.

https://bitcointalk.org/index.php?topic=7216.msg1950922#msg1950922

[mrkubanftw]

I've got one and can only get 4 cards to work.  I get ~1.8 MH/s mining litecoin, your mileage may vary.
All cards are 6950s (different brands), 3 are flashed, all are overclocked in cgminer which also underclocks if they get too hot. Stock voltage.

I tried a 5th card, it booted but I couldn't get it to mine.

https://bitcointalk.org/index.php?topic=7216.msg1950922#msg1950922

wow thanks for the info man! Are you running risers or right into the board? Know anything about the risers people mention?

[batman, not crabman]

Hopefully the link works, I use the x16 to x1 risers and a x16 to x16 riser for the main card that I plug the monitor into.

http://www.ebay.com.au/itm/PCI-Express-PCI-E-1X-to-16X-Riser-Card-Extender-Ribbon-Cable-for-1U-2U-chassis-/161013743576?pt=AU_CablesConnectors&hash=item257d2abfd8&_uhb=1#ht_4196wt_979

They work fine for mining, but you won't be able to play games.