raja1234 Posted March 22, 2009 Share Posted March 22, 2009 I'm gna get a Corsair 600W SMPS ... But i found in some posts that it requires a real sine way generating UPS ...But those posts were posted in 2004-06...is it still incompatible ??? or should I go for a passive PFC??? my sys config :: Quad core , Intel Classic seriesMB, 2GB ram,250GB SATA HD , XFX 9800 GTX card....and my UPS is a old model APC 500VA one. do i really need a Active PFC PSU ????? or can i go for smeone else??? suggest some PSUs plz....itz urgent plz!!!!!!!!!!!!!!!!!! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 23, 2009 Corsair Employees Share Posted March 23, 2009 Quality non sinusoid UPSs will work. However, we do not make UPS recommendations so you will need to consult the UPS manufacturer for their specifications. Link to comment Share on other sites More sharing options...
moogman79 Posted March 24, 2009 Share Posted March 24, 2009 If you have a PSU with active PFC you MUST use an UPS with a clear sine output! The switching steps are so large that the pfc can only on or off, this will result in very hard switching loads! And this will damage your PSU with the time! This will get more complicate if you are using "redundant" PSU configurations, they are more sensible to such loads switchings I have had about 200 Customers with that problem. The problem was... the PSU was defective, we have swaped it against a new one (with active pfc) and the old UPS did trash most of them within 1-2 years. Sorry for my bad english... Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 24, 2009 Corsair Employees Share Posted March 24, 2009 NP and thanks for taking the time to post that I think it will help others. And let me know if you need help getting the failing PSU replaced, but I think from what you posted it was some other manufacturers PSU. Link to comment Share on other sites More sharing options...
lalittle Posted March 25, 2009 Share Posted March 25, 2009 If you have a PSU with active PFC you MUST use an UPS with a clear sine output! The switching steps are so large that the pfc can only on or off, this will result in very hard switching loads! And this will damage your PSU with the time! This will get more complicate if you are using "redundant" PSU configurations, they are more sensible to such loads switchings I have had about 200 Customers with that problem. The problem was... the PSU was defective, we have swaped it against a new one (with active pfc) and the old UPS did trash most of them within 1-2 years. Sorry for my bad english... I recently had this exact discussion with tech support from another PSU company (I'm not sure if it's okay to mention the other company or not), including an exchange with one of their power supply engineers in Taiwan. Their advice differed from the information offered by moogman79, so I thought I'd offer it here. Note that I have no personal technical knowledge of this stuff -- I'm merely conveying the information I received. The conclusion of the conversation was that if you're on a 120V system (i.e. N. America), you can still run their active PFC power supplies on a non sine wave UPS. He said that while the situation is not "healthy" for the PSU, the actual damage to the PSU would be effectively negligible in normal situations, i.e. as long as you don't run your system on battery power for unusually long periods of time, which he defined as "every day and every hours." The engineer compared it to smoking, saying that it was "unhealthy," but it doesn't kill you immediately. He said that using a sine wave UPS was NOT a requirement for their power supplies in 120v areas. (Apparently, this was not true for 240v systems.) Anyway -- I just thought that this might be of interest here. I don't know exactly how it relates to Corsiar PSU's, but the engineer I spoke with said that the information he was giving me would apply to most PSUs. Larry Link to comment Share on other sites More sharing options...
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