PC hardware: DVD Burning Slows System to a Crawl

DVD Burning Slows System to a Crawl

First, the basics:
I've got:
Homemade Box PC
Windows XP Pro SR1
ECS Elitegroup 848P-A7 Mainboard
P4 2.6
768 memory at 3200
5GB Paging File, +/-
300GB IDE Hard Drive (Master on IDE-0)
200GB IDE Hard Drive (Slave on IDE-0)
Pioneer Slot-load DVD-ROM (Slave on IDE-1)
SONY DRU-530 DVD+/- Burner 8x (Master on IDE-1)
2 USB Mouses, PS2 Keyboard, USB Webcam, USB Brother Printer/Faxer/Copier....
(is that enough info?)

Whenever my DVD burner's burning, whether the source is a disc image/ISO, Hard drive 1, hard drive 2, the DVD ROM, where ever, the system slows to a crawl without fail. Last night, I was copying (not encoding, compressing or anything else...a straight 1:1) and Clicked the Start button in Windows. It took over 90 seconds for the menu to come up. Is this just the way things are, or might there be a tweak or something fun i can switch to make this better? I've tried all kinds of media (generic, Fuji, TDK, SONY) and it's always the same. Note: this only happens with DVDs. When I burn CDs, it's not noticable at all.

Anything anyone can tell me would be appreciated.

I fear that the problem might be the mainboard itself and the way it's made (it was a bargain at Frys)

THANKS in advance!
TONY
nine8102@gmail.com
feel free to contact