Here is a calculator for power supply wattage requirements.
http://www.jscustompcs.com/power_supply/
I didn't run your config but be sure to include SCSI adapter and video card.

Analabha Roy wrote:

> Free Hui wrote:
>
> > I have experienced a similar case as yours. I have two 50GB Seagate hds in
> > my system controlled by AHA2940UW2. The solution was to use another Power
> > supply. My original Power supply is a Generic 450W. I did not know if my
> > case is applicable to yours. However, it is worthy of a try.
> > F. Hui
>
> My power supply is a generic 250 W (specs here:
> http://support.gateway.com/s/PC/310_...00788sp6.shtml)
>
> I have the following devices connected to the power supply
>
> 1. mobo (obviously heh)
> 2. 2 weak but quiet Case fans
> 3. cpu with heatsink and a fan on that
> 4. IDE hard drive (7200 rpm)
> 5. The SCSI HDD (10,000 rpm)
> 6. DVD burner/CD burner/DVD ROM combo drive
>
> What is the best wattage for this type of configuration?
>
> Please throw me a bone here.
>
> Regards,
>
> AR
>
> >
> > "Analabha Roy" <daneelNOSPAM@physics.utexas.edu> wrote in message
> > news:ddni89$f8h$1@geraldo.cc.utexas.edu...
> >> Hi,
> >>
> >>
> >>
> >> I have a Seagate ST336607LW SCSI hard drive where I've installed my Linux
> >> (FC3) & windoze root partitions. It is a 68 pin HD with no internal
> >> termination. My scsi controller is an SIIG AP-20 PCI adapter (50 pin with
> >> internal auto-termination). I connected my scsi card to my scsi hard
> >> drive as follows:
> >>
> >>
> >>
> >>
> >> 50 pin ribbon
> >> 50-pin card---------------->50-pin terminator-->50-68 pin adapter-->SCSI
> >> Drive
> >>
> >>
> >>
> >> The hdd is on a dedicated connection to the power supply (no other
> >> devices chained to it along that power cable).
> >>
> >>
> >>
> >> Occasionally , irrespective of whether I'm on windoze or linux, the hdd
> >> makes a sickening "click" sound, shuts down (I can hear it) and spins up
> >> again. My entire compu freezes & I have to hard-reset.
> >>
> >> I checked the cable connections & they seem pretty tight, so I'm rather
> >> confused as to what's up. Is the termination bad? IS the HD overheating
> >> (it's typically at around 50 deg celcuis, & the operating limit is 54
> >> deg, I'm getting an extra case fan that should cool it down further)? Is
> >> there something wrong with the controller? Is the hard drive itself
> >> busted (no badblocks or anything like that, and I ran Seagate's
> >> diagnostics on the HD and there were no errors).
> >>
> >> Where should I start in trying to diagnose the problem? DO I require
> >> special hardware?
> >>
> >> Bear in mind that there are no syslog error messages in linux as syslog
> >> can't write to the HD when it shuts down, so...
> >>
> >>
> >> I would appreciate ANY advice offered on this matter.
> >>
> >> Regards,
> >> AR
> >>
> >>
> >>
> >>
> >>
> >>
> >>