I'm thinking of getting a UPS in conjunction with a new pc - dual core and flat panel monitor (the monitor appears to have wattage of upto 65W) what would the pc draw?

Dell provide the option for a Belkin 6-Socket 500VA Battery Back-Up which appear to provide cover of upto 300W or an APC Back-UPS CS 650VA 230V which I think is about 400W. Presumably as Dell are offering the Belkin with the system the Belkin would be adequate for the pc and monitor?

Why do you want the ups m8, just to clean up the power? it's really designed to let you bring the system down in an "orderly" fashion in the event of a power failure.

APC's website has a utility to tell you what UPS would be suitable based on your needs.

fluff'

yes I am aware it is to bring down the system in the event of a power failure and that is what I want in for - ups will only back up a certain amount of wattage in total hence my question re how many watts the pc would use.

I'll check out the apc site if I can get on it - it was down earlier today.

It depends on your PC. ie how many drives, processor type, no. of fans and whether or not you have integrated graphics etc on your motherboard. The average pc will draw up to 200w but to be safe (even with a relatively standard system) I would allow for 300w. Check the wattage of your PSU. A properly sized PSU will have 20-25% more capacity than the average load on it.

I would recommend against the Belkin units tbh. I had one which blew the ring main fuse in the house when the power came back on after its very first geniune operation after 6 months of installation. The unit itself was smoked and not far off catching fire. That's not something you want to be happening when you are off on holiday.

I found on the dell website that the chassis is 375W rated - the monitor was 65W so I make that 440W the ups offered by Dell for the system is Belkin 300W and an APC 650 which is 400W. In my mind both would appear to be insufficient unless I'm missing something?

Dell do offer the APC 800 under power which is 540W rated and which would appear therefore to be the one to go for?