Did the lack of powered risers cause this?

[qiuness]

Hello,

I just had this happen on a rig with 4 cards. This is the second rig with 4 cards that is pulling 980w out of a 1200w PSU.

just wandering.
Thanks

[barwizi]

yup mostikely your cards are drawing more power from the board than they should. which 4 cards?

[qiuness]

1x5970
2x5850
1x6970

[tacotime]

yes.

i have a similar setup.  put the higher draw cards (5970 and 6970) on powered risers.   I have a 4x6950 rig with two cards on powered risers that has never seen problems and draws about 900w.

[CaptainPicard]

I believe pci-e devices are powered by the 4 pin (or 8 pin) power connector, so this doesn't make sense.

Edit:  Also, it seems you've had a short between the 3.3v rail and ground.  PCI devices would utilize the 5v rail.  This doesn't appear to be caused by too many graphics cards onboard.  I've run 4x 5870's severely overclocked in each rig without any powered risers for months straight without any issues.   

[Fuzzy]

Hello,

I just had this happen on a rig with 4 cards. This is the second rig with 4 cards that is pulling 980w out of a 1200w PSU.

just wandering.
Thanks

Yes it did

[qiuness]

yep also found this:
http://buyahash.com/powered-riser-faq/

thanks for clearing it up.. ordered some powered risers... god dammit.. i have another 2 rigs with 4x6970s and 4x6950s. Gotta check them soon... Until my powered risers arrive... i`ll build some

[Hydroponica]

Why does this happen all the frigging time? You put ~ $1300 in video cards, into a $200 motherboard, and you skimp on the $35 or so, for the powered risers.

[m3kt3k]

I had that happen to the 12V Aux on a mb that was very overclocked. Sucks but I was able to solder in makeshift pins and "Fix it". It is odd though powered cards not need that much from the MB unless they are not getting enough from the PCIe power feeds.