I've noticed lots of folks on here with HIS X1800XTs. Is there any particular reason this card seems to be popular? I was scoping out newegg today and the HIS card is about $90 more than the ATI. Of course the ATI is OEM and the HIS is retail. Also the difference is only $40 after you factor in the mail-in rebate. However I'm still curious about any differences. NewEgg shows a bunch of these cards ranging from about $489 - $599 but they all show the same clock speeds and features, even some are identical brands, but different models, so what's the difference?