I've built plenty of machines with 915 and 925 chipsets, combined PCI and PCIe and not seem any performance problems so the reason why other forums dont talk about it is because unless you are very unlucky there isn't a problem - it's the sort of thing driver writers like to get all hot and bothered about.
M-Audio's Delta range is now soooooo old that i really dont think they would complain if PCI became obsolete, it would give them an excuse to ditch them - great though they are. Emu are the only ones i worry about as their whole range is PCI based... I have noticed that Digidesign are developing PCie versions of their HD cards - who'd have thought that they would ever be ahead in the technology game?
My only worry is what to do with my Powercore and Delta 44 when i make my next upgrade jump to whati imagine will be a PCI-less systems...
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