AAP's Internal UPS uses one (1, uno, single) step converter. AC->DC one time. (Did I say I opened up the power supply?)When AC fails, DC from battery directly works on the computer systems. When AC is fine, Ac will be converted to DC, and the DC will charge the battery, and support the computer system as well. So, ther is no more AC-DC-AC-DC crap anymore. (I am not sure about IPPS's Internal UPS.)
I have tried and compared UPS2 from AAP and IPPS. I perfer AAP's ups2
Reasons:
1. AAP's Internal UPS works with Pentium IV and T-birds. (atx 2.02, atx 2.03)
2. Longer support. AAP uses 400-500VA back-up unit. (Amsdell is 120VA.) I got 45 minutes on my PIII 550 station, and 35 minutes on my Athlon 1.2 GHz
3. Also supports Monitor. (Amsdell does, too)
4. I can double or trible the battery package if I need more back-up time. (so, I can get 90 minutes back-up if I want to).
5. Cheap. I got a 250 watt power supply and a back-up unit for only $99. (a COMDEX show special price). They told me an additional power back-up unit costs $49. If price is a major concern for some of you, just wait till they drop the price. I think the price will go lower than $60 in 12 months or so.
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AAP's Internal UPS uses one (1, uno, single) step converter. AC->DC one time. (Did I say I opened up the power supply?)When AC fails, DC from battery directly works on the computer systems. When AC is fine, Ac will be converted to DC, and the DC will charge the battery, and support the computer system as well. So, ther is no more AC-DC-AC-DC crap anymore. (I am not sure about IPPS's Internal UPS.)
Reasons:
1. AAP's Internal UPS works with Pentium IV and T-birds. (atx 2.02, atx 2.03)
2. Longer support. AAP uses 400-500VA back-up unit. (Amsdell is 120VA.) I got 45 minutes on my PIII 550 station, and 35 minutes on my Athlon 1.2 GHz
3. Also supports Monitor. (Amsdell does, too)
4. I can double or trible the battery package if I need more back-up time. (so, I can get 90 minutes back-up if I want to).
5. Cheap. I got a 250 watt power supply and a back-up unit for only $99. (a COMDEX show special price). They told me an additional power back-up unit costs $49. If price is a major concern for some of you, just wait till they drop the price. I think the price will go lower than $60 in 12 months or so.
6. The company is from Rhode Island.