Mobo confirmed to work 2/dual 5970's

[Steve]

I was all excited to plug in a second 5970 into my system, only to find that there is apparently a bug of some sort that keeps it from booting (can't even get to the bios screen and no video signal when both are plugged in).  This is an ASUS M4A89GTD/Pro USB3.  Don't not get this mobo if you plan on running dual 5970's.

So, now that I have to get another mobo (and desiring not to be a beta tester for the mobo manufacturers), I'd like to find one that is *confirmed* (by someone actually running dual 5970s) to work.  I need an AMD socket am3 mobo.

[ronaldmaustin]

It's not the mobo.  Your power supply is deficient.  Buy an 800 Watt Antec or 800 Watt Corsair.  And before you tell me, "Well, I have a 1000 Watt XXXX Brand" bear in mind that the ratings on power supplies are pure fiction.  Here's a 1000 Watt Corsair delivered to your local Walmart for under $230. http://www.walmart.com/catalog/allReviews.do?product_id=12457257

[Steve]

It's not the mobo.  Your power supply is deficient.  Buy an 800 Watt Antec or 800 Watt Corsair.  And before you tell me, "Well, I have a 1000 Watt XXXX Brand" bear in mind that the ratings on power supplies are pure fiction.

I do in fact have an Antec 1200W power supply...here's the model:
http://www.antec.com/Believe_it/product.php?id=MTc1Nw==

Based on the following thread, it seems I'm not the only one experiencing trouble with this mobo:
http://vip.asus.com/forum/view.aspx?id=20110211072855742&board_id=1&model=M4A89GTD+PRO%2FUSB3&SLanguage=en-us&page=1

I have opened an issue with ASUS.  But the question remains...I'd like to hear from people with a dual 5970 setup with a socket am3 mobo, which specific model are they using?