hi,
let's see.....sapphire nitro and pulse, xfx Merc and mercury, power color hellhound, ASRock taichi and phantom, Asus dual OC, Asus tuf oc, gigabyte gaming oc, all the liquid cooled xtx.. liquid devil and ASRock extreme .. all have dual bios! I'm sure I missed some....I think even the yeston xtxs are dual but I can't say for sure..no experience with them.
I've owned 2 xfx black editions one XT and one XTX both came with hynix memory and have treated me excellent...excellent stock cooling.. only thing I could say I wasn't thrilled about was how loud the Delta fans are on them but they do cool well.. and are only loud when set aggressively.
prost.