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Unless I've misread something, BD only works on AM3+, which is the 990 chipset only...
http://www.asus.com/Motherboards/AMD_AM3/Crosshair_IV_Formula/#CPUS does not list bulldozer on the support list eitherYou might get lucky and get a bios update later, but right now it looks unlikely.
For instance, if all I had was a bulldozer and a 890fx how would i get the bios update installed?
Thanks for reply,
I mean that if the bulldozer was the only cpu I had, how would i boot up, download and install the bios update?
It says not recommended.. not that you can't use it, so you'd flash with your old chip.. and replace with the BD once complete IMO.Crosshair IV Formula 3017 Test BIOS
For use with AM3+ CPUs only. Not recommended for use with AM3 or earlier CPUs.