I don't think anybody has actually explained what ACPI *is*. Basically it allows Windows to make all the IRQ arrangements (I can't believe we're still using IRQs these days) and set up IRQ sharing. The problem a lot of people have is that Windows forces all cards to operate at IRQ 9. While that normally shoudn't be a problem, some cards (like Scope) might not like sharing an IRQ with other devices and might have performance problems. Standard PC mode, on the other hand, lets the motherboard BIOS make the IRQ arrangements, and you can even (on some boards) change what PCI slots get which IRQ. So this has improved things for some people (I personally operate in Standard PC because everyone else said to!).
Here's where you can get even more confused: modern motherboards have a feature called APIC (not to be confused with ACPI) that, along with ACPI, allows Windows to assign 24 IRQs instead of 16! In this case you DO want to run in ACPI mode *and* APIC mode. (Do you have a headache yet?)
Peripheral suggestions:
It's really best if you build your own PC from scratch. I know that sounds awful, but PC makers always skimp on something and have proprietary cases and other weird things.
I think everybody here agrees that ASUS motherboards are the best. You can use either Intel or AMD CPUs at this point: there were some issues a couple of years ago, but those have been ironed out since then. Find the latest chipset from either Intel or nVidia (nVidia seems to be the best for an AMD system) that uses DDR RAM, not Rambus. I think memory is up to DDR 400 now, so go with that.
I have an ATi video card with my triple-CreamWare system, and it works fine. I'm sure nVidia and Matrox are great too -- they're probably all about the same for normal applications. The big differences lie in the 3D games.
Buy a big hard drive. Windows can run its setup program off the CD and allow you to partition and format the drive -- you'll want to use NTFS. I know everyone thinks you should have two hard drives, but honestly I've never, ever, had a problem with one. Serial ATA seems to be the latest greatest thing, but since hard drives themselves operate at a far slower speed than the bus, I don't know if there's a huge improvement over ATA133, or ATA100 or ATA66 for that matter.
If at all possible, get a motherboard that includes FireWire!! Don't worry if it has an onboard audio chip -- you can use it alongside Scope or turn it off in the BIOS.
When you first boot up your new computer, you'll want to enter the BIOS by pressing "delete". There you can make changes to your system, including turning off the old, ancient serial and parallel ports to save IRQs. Most of the items you can leave alone.
Assembling the computer should be fairly easy if you know how to screw things together! Have fun.
Cheers,
Shayne
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<font size=-1>[ This Message was edited by: Shayne White on 2004-06-30 03:51 ]</font>