Back in the ole days Sapphire used to build the Ati brand cards.I am not sure about now.
I have had Sapphire Cards in the past.They eventually died after many years.(out of warranty)
I now have an XFX 6850.It has dual fans and heat pipes for cooling.It is the quietest card I have had.XFX also has a double lifetime warranty(Whatever double lifetime means).My XFX did not come with any cables or adapters.If that is important to you it is something to consider.(I had to dig up a dvi to vga adapter).Also XFX seems to be a little more expensive than Sapphire.
If you are water cooling you might look around and see which card has a custom waterblock.
I can not speak for Powercolor or Gigabyte as I have never owned one.
I would not hesitate to buy either the Sapphire or the XFX.Depending on sale price, availability and overclock options.
|