Just because Sapphire make cards for ATI doesn't not mean that their own
brand cards are of the same quality. For example, the JVC and Technics
hi-fi equipment is made in the same factory by the same workers, but the
Technics brand is the 'higher quality JVC', and tend to have better parts in
them.
During a summer vacation holiday in the UK, I worked on an audio speaker
production line, where we would be building low quality Panasonic speakers
one week, and high quality Mordant-Short ones the next. The only thing that
really changed was the number of blemishes we had to look for before
rejecting an empty cabinet carcass (for the MS ones it was 'zero blemishes',
for the Panasonic, we were told to fill in small scratches with a black
crayon), and which box the speakers and muffler wadding came from. I
personally used to sneak the odd $300 Mordant short speaker set into some
$60 Panasonic speakers, because (a) It felt good and (b) getting caught
doing it meant the sack, so it broke up the boredom
Having said that, it seems that many recent batches of Sapphire cards are
simply rebadged ATI cards. It seems like the price differential between the
two sets of components is less that the cost of retooling the production
lines, and in many cases, its all ATI spec cards.
I think the upshot is that the Sapphire cards are likely be the same quality
as the ATI ones, but *this is not guaranteed*, because they are not defined
to the same spec, and the Sapphire ones may have slightly inferior memory,
depending on availability.
S