either except the powercolor. though i will be biased and say sapphire(their products are usually of high quality, including their old PSUs which cannot be found in the market anymore. their mobos are hit and miss)
I have all brands mentioned ( HIS = 1x4890 3years, Power Color = 2x4770 2.5years, Sapphire = 2x6950 9months ) & never have problem with any of these brands. But I am more comfortable with Sapphire too.
HIS = likely fan noise
PowerColour = cheap capacitor may cause ticking noise
Sapphire = silent fan but base of heatsink kinda rough which may not dissipate heat as good as the others. Has better customer support than the other 2
sapphire and his iceq x will be the way to go instead of powercolor.
in my opinion you should go with his iceq x hd 6870 for cheaper price when compared to the performance,better performance then both card,better cooling,better overclocking i mostly use sapphire cards but between that sapphire and his iceq x the his iceq x will be the way to go.
not sure, these are just more than showing off thier products but HIS brand isn't a bad choice..
Sapphire overclock very well than those others.
his iceq x is one of the best overclocker its cooling is also better then that sapphire one i m
always buying sapphire gpus but when the simple sapphire vs his iceq x then i will go with i ceq x its better then it seems