Oops, that's 24Gb on the RAM.
Should say, "I should be able to use my current UPS."
I shouldn't have said bump up to a 1000W.
I do plan on overclocking.
Where's the Edit icon on my original post?
1000 W PSU should be enough. I tried it here eXtreme Power Supply Calculator Pro v2.5 and it came out at around 1050 W and UPS at 1750 VA, both with some safety margin built in, and taking some overclocking into account to 4.4 GHz.
Harm (and all), here's the deal: I bought the 1200W power supply when I was planning on upgrading my dual quadcore system to CS5. I was going to just add the 1200W PS, a GTX480 & an additional pair of HDs in RAID 0. Eric, from ADK, suggested that I bite the bullet and go for the new build, and I'm glad I did, even though it's not built yet! So, the power supply is apparently overkill, by your calc. Overkill never hurts unless it forces one to upgrade their UPS as well, for Eric also told me that a power supply has an initial power draw of its full rating, in this case 1200w when you first power it up. That's my dilemma. Do I go with the 1200w power supply I have on hand, or do I send that back to NewEgg and get the 1000w. Opinions are welcome! By the way, Harm, many thanks for your help on this matter.
I have never used a UPS before and dont know anything about them.
My questions is: Since its a UPS if you lose power your regular PS should not have to power up like it was a cold start right ?
How much draw does it really use when switching from wall power to the UPS ?
GLenn, that's a really good point about not needing to power up when on batteries though I think Eric would have taken that into consideration when we discussed this issue, even though I failed to mention it. I have a feeling though, that it's still an issue for a UPS, for all power to the computer, including startup, runs through the UPS even when there's active AC.
The scenario you describe only works on a standby UPS unit that just passes through the AC coming in. If you get a Line Interactive unit which has a rated transformer for the Wattage or a Online UPS that always feeds from the battery, then the UPS wattage rating has to exceed the total wattage rating of every item plugged into it. Disregard this at your equipments risk. I have seen the results of not following this and the damage it causes but ultimately it's up to what a person is willing to risk for the price.
BTW this UPS would handle that system as long as you only plugged that into this.