Judging by your specs, the system should boot pretty quickly.  I run Leopard on 
a Dual 450 Sawtooth system and booting off the internal IDE bus takes less than 
a minute to desktop, including a pause for login.

A couple of thoughts:

1:  Does your processor upgrade require a cache enabler KEXT file?  If it isn't 
present, the machine may not be using the higher level caches, causing it to 
run painfully slowly.
2:  I seem to recall with Leopard that you have to remove or hack a particular 
KEXT file pertaining to the nVidia drivers that originally shipped with Leopard 
to avoid a long boot time when using a flashed 6200 card.  I can't for the life 
of me recall which one it is, but when I had my 6200 card in my Quicksilver, I 
remember it took FOREVER to load the progress bar when the computer started up.

Edit:

See attached website for additional help:  If you don't feel like reflashing, 
there's a comment at the bottom which tells which KEXT file to remove and where 
to remove it from.

http://everythingapple.blogspot.com/2007/11/os-x-105-leopard-g4-nvidia-boot-delay.html


On Jul 6, 2010, at 7:25 PM, Michael B. in Cincinnati wrote:

> Hi: I found a deal on a copy of Leopard, and updated my G4 DA. It's
> been extensively upgraded:
> 
> - 1.5 GHz OWC processor
> - 1.5 GB of RAM
> - DVD-RAM
> - Acard AEC6290M SATA card with a 160 GB HD
> - Reflashed Geforce 6200 256MB video card
> - USB PCI card
> - maudio Delta 2496 sound card
> - Sweet Multiport front panel
> 
> but the boot time has gone up to 3 min. 15 secs! It's about 20 sec
> just to the grey apple, another 60 sec of spinning gear, and then two
> mins plus of blank blue screen before the desktop shows up. A friend
> of mine here claims that this isn't normal. What boot times are folks
> seeing with 10.5.8? Is there some setup that I can change? I installed
> the drivers for the SATA and sound cards, but that made no difference.
> Does anyone have a clue what it's doing?
> 
> Thanks in advance.
> 
> -- 
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