I have noticed that certain operations on my Quad PowerMac with Aperture 1.1 seem slower than they did with Aperture 1.0 or 1.0.1. I think I’ve found the culprit, the Nvida GeForce 6600 video card. I’ve found several threads on Apple’s discussion forums:
Apparently, Aperture performance is significantly better with a 7800GT or Quattro video card. The 6600 card has been removed from Aperture’s system requirements in the Apple Store. I would have gone for the 7800GT BTO option, but they weren’t available when I ordered my Quad.
I’m a little disappointed that we can’t buy any third-party video cards for the latest PowerMacs. Sadly, Apple’s video card upgrades are for new systems only. There is the possibility of getting a reflashed 7800GT from eBay or from this store, but the idea of paying an extra $750 isn’t all that appealing.
tow.com 
Too bad Apple let go a lot of its Aperture team…I wonder what that means for future of the software?
See here.
(Or if I can’t use html – http://wiredblogs.tripod.com/cultofmac/index.blog?entry_id=1468591)
[…] my new Nvidia GeForce 7800GTX 512MB video card from rubytuesday. For those of you who have not been following the saga, the stock Nvidia 6600 video card that most Dual-Core G5 PowerMac owners have purchased is […]