v2chrisb Posted October 5, 2007 Share Posted October 5, 2007 Greetings, Thanks in advance for taking the time to assist me with my inquiry :biggrin: Last night I replaced a Thermaltake Purepower W0100RU (500W) with the Corsair HX520W and noticed a difference in the +5.0V rail readings being reported in BIOS *and* from Asus' PC Probe software. The PSU *is* plugged in to a brand new Cyberpower 685AVR UPS (rated at 390W). Both the Thermaltake *and* Corsair PSUs were plugged in to this UPS. Please see the data below and please advise. My questions are: 1. What should I conclude about the -0.13V difference between the Thermaltake and the Corsair? 2. Should I exchange the Corsair, i.e. is the 4.84V within spec? The old Thermaltake Purepower W0100RU: VCore @ 1.34V +3.3 rail @ 3.31V +5.0 rail @ 4.97V +12.0 rail(s) @ 12.03V The new Corsair HX520W: VCore @ 1.34V +3.3 rail @ 3.31 +5.0 rail @ 4.84V +12.0 rail(s) @ 12.03V Thanks again! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 5, 2007 Corsair Employees Share Posted October 5, 2007 As long as the +5v rail stays between 4.75v and 5.25v then it is within spec. There may be minor fluctuations between different PSU's however the BIOS and software voltage readings will never be 100% accurate. The only way to know the exact voltages would be to use an electronic VOM. Link to comment Share on other sites More sharing options...
v2chrisb Posted October 5, 2007 Author Share Posted October 5, 2007 Ram Guy, Thanks for the quick response -- greatly appreciated! I understand that the motherboard BIOS isn't the most reliable source to obtain voltages, but speaking candidly, it's still a bit unsettling to spend a good amount on a PSU and only have 0.09v headroom on the +5V rail. Hypothetical question: if my +5V rail falls out of spec in 2 years, will Corsair replace it under warranty? Thanks again for the rapid response. I must say, it's great to be able to "air out" issues on a forum like this! :biggrin: Link to comment Share on other sites More sharing options...
EliteKiller Posted October 5, 2007 Share Posted October 5, 2007 I understand that the motherboard BIOS isn't the most reliable source to obtain voltages, but speaking candidly, it's still a bit unsettling to spend a good amount on a PSU and only have 0.09v headroom on the +5V rail. As Ramguy mentioned you should erase any doubt and test the rails with a $20 DMM from your local Sears, Radio Shack, or other fine establishment. I'd wager that your TT was reading the 5V on the high side. Hypothetical question: if my +5V rail falls out of spec in 2 years, will Corsair replace it under warranty? Yes. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 5, 2007 Corsair Employees Share Posted October 5, 2007 Yes they have a 5 year warranty, but before you did that I would suggest testing the PSU in another system to be sure. Link to comment Share on other sites More sharing options...
v2chrisb Posted October 6, 2007 Author Share Posted October 6, 2007 I'd like to thank everyone for their excellent advice and assistance! I'm fortunate to work at a technical college, so I'll bring the PSU to the Electrical and Computer Engineering Department and ask them to test the +5V rails. I'll be sure to post the results (probably some time next week). Thanks again! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 9, 2007 Corsair Employees Share Posted October 9, 2007 Yes please do let us know! Link to comment Share on other sites More sharing options...
v2chrisb Posted October 12, 2007 Author Share Posted October 12, 2007 Ram Guy, Today a professor from our Electrical Engineering Dept. helped me measure the voltages on my HX520W. Two separate readings on two separate VOMs showed exactly 5.01V. I can rest easily now :D: Thanks again. I'm going to put this beautiful PSU to work now! Cheers! --Chris Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 12, 2007 Corsair Employees Share Posted October 12, 2007 Glad to hear everything checked out! Link to comment Share on other sites More sharing options...
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