you can get a shitty asrock mobo for $30 that screws already after 2% overclocking.
4 days ago i purchased the parts for my new comp:
celeron d 336 2,8 ghz (will be exchanged in july when intels core 2 duo cpus arrive) - 50 bucks
asus p5w dh deluxe - 200 bucks
2x 300gb sata2 hd - 200 bucks
2gb ddr2-667 ram - 150 bucks
ati x1800gto - 200 bucks
plus case and cpu cooler - 70 bucks
im quite suprised that the celeron works still fine since i overclox0rd it to 3,6 giggahurtz D:
>>28
yeah, there are some desktop boards with onboard u-320 scsi controllers and even pci-x interfaces (asus P5WDG2-WS for example)
anyways, depending on your definition of "good gameing pc" you wont be able to play recent or older games with mid-low details for a $200 system :|