Which UPS will handle this ?

The BR series and Smart-UPS series usually use 2x12V Exide SMF batteries in series. The external connector is directly connected in parallel with these batteries.

The SUA1000UXI has quite a noisy fan. But it only runs while charging.

You'll need at least 800W output from the UPS to be on the safe side for that config. The rating of your PSU alone is pushing it close to the SUA1000I's 670W. With the parts listed aboue, even 670W will be enough, but you'll run into problems if you add more stuff.

^ How much for this Rig

AMD Phenom X2 550BE @ 3.8Ghz
1x2GB + 2GB Rams
2x HDD
MSI GTX260 216
22" Samsung 2233sw
Corsair 450VX
4 Fans

Oh man this is seriously becoming the one stop shop for UPS stuff!!

^^ From what I understand, an 800 VA UPS should be fine for you, with room for future upgrades. And of course, get an APC.

Basic calculation to be completely safe is to take your PSU rating, add 10%, and add the wattage of whatever extra stuff you connect additionally to the UPS. The will give you the ACTUAL output in watts required from the UPS. The VA rating for the UPS will be much higher due to the power factor loss.

That setup is maxing out your PSU. The GTX 260 216 alone consumes around 280W under load. In a few months time the PSU will fail as the output decreases due to capacitor aging.

1) Does the 1000UXI have a built-in charger that can charge 2 x 150Ah batteries or even 2 x 200Ah batteries?

2) If my maximum power draw is abut 300 watts, how long do you think it would run on a 2 x 100Ah battery setup?

Totally, this seems to be becoming the one-stop place for all UPS queries.

Also are you guys aware of any UPS (a tiny one like the Back-UPS series with USB data port) that can run off a non-sine wave inverter?

1) Yes It can easily charge 2x200AH 12V batteries in 4-5 hours. Mine takes around 3 hours to charge 2x150AH batteries. Its charging functions just like an internal battery UPS. In fact it doesn't know whether the batteries are internal or external as even in the models with internal battery, the external connector is DIRECTLY connected in parallel with the internal battery wires.

2) Depends on the C rating of the batteries. 100AH C10 means if the battery is loaded to an exact amount such that it takes 10 hours to discharge, then it would have provided 100AH till then. But suppose you discharge the battery in 5 hours, it will probably only provide 65AH. Which means another name for the same battery is 65AH C5. The slower you discharge a battery the more AH it gives. A 150AH C10 battery gives approximately 100AH when discharged in 3-4 hours.

When batteries are connected in series the AH remains the same. So for 2x100AH C5 12V the total VAH is 100x(12+12) = 2400VAH. Consumption of the computer is 300VA (For consumption VA and W are the same). Dividing 2400VAH/300VA you get 8 Hours. This is assuming your batteries are 100AH C8. Now theres a problem here, you derived a runtime of 8 hours, but you used C5 rating while calculating it, so the answer is inaccurate. The battery AH vs discharge rate follows a curved graph, so its impossible to directly calculate how much runtime a battery of a particular AH and C rating will give. The run time is accurate only if the answer you got is equal to the C rating used in the calculation. In any other case you will always get less runtime.

If you buy 2x100AH C10 battery, you will probably get 2-3 hours for a 300W load. It depends on what the UPS considers low voltage. The runtime of the same batteries will drastically vary between different UPS models.

^^ Torch, dude that is some crazy in depth knowledge you have man!!

I am totally clueless as to what all you said but it sure sounds amazing!

I have a APC BackUPS RS1100. It would always trip, never able to support the load of my rig (incl LCD monitor) when it was folding using two video cards while pulling only 480 Watts at the wall (checked using VoltCraft EnercyCheck meter). The rig config at that time was

CPU = Q9550 (non-OC), 100% load (FAH SMP clients)
ATI Radeon HD4850 (non-OC), 100% load (FAH GPU client)
nVidia 8800GTS 640MB (non-OC), 100% load (FAH GPU client)
WD 640GB
2 x Seagate 500GB
2 x 2GB RAM (non-OC)
Corsair TX650

Theoretically, at 65% efficiency, the UPS should have been able to support around a 650 watt load but it was nowhere close to that.

This is the same problem I faced. At load neither smart ups 750i works nor apc 1.1kva . Theoretically both must support my system. Now opting for apc 1500i hoping this works, a big hole in my pocket when already in cash crunch situation.

So no battery no back-up right?? It'll need a battery even to switch off your system?

I dont think I'll be adding any more components in the future but anyways what is the cost of a basic battery that I would need to the config??

What is the price SUA1000I?

You've misunderstood. You'll always have battery runtime no matter the load. You need sufficient wattage so that the UPS doesn't TRIP into overload and cutoff.

Similar to my BackUPS RS 1000. Could only support 400W before overloading. And the internal battery died within a few months.

The Smart-UPS 750i is only rated for 480W. If its for the rig in your signature then there is no way it will work.

Hmm.... I was actually asking about SUA1000UXL.... If I don't add battery will the system shut down when there is a power failure ?? Or will I have enough time to shut down my system??

I'm just asking as I don't have the budget to buy batteries....

^^^powerchute shows power consumption to be around 400W. That's the load it's not able to handle when power goes off. Am I missing something?