XenoMorpH 2 Posted December 10, 2008 Hi, I have a CM850W ESBA PSU. In Windows, the 12V rial shows it's 10V? Other hardware I have: ATi Radeon 4870X2 3xHDD's 2xDVD-Writers Can't imagine this would drop the 12V rail?... Is there sumfn wrong with my PSU? **EDIT** Some additional info: On my old Asus M3a32-MVP Deluxe mobo the 12V line was stable in OCCT stress test, But now with my new Asus M3A79-T the 12 line dropped to 10V. Maybe Mobo problem? Quote Share this post Link to post Share on other sites
Otniel Ruelas 22 Posted December 12, 2008 Highly advise that you rma that power supply, if in north america, please go to http://www.coolermaster-usa.com/erma if in EU please contact support@coolermaster.nl. Quote Share this post Link to post Share on other sites
Zenphic 0 Posted December 12, 2008 Motherboards rarely report voltage in Windows properly depending on your motherboard. I suggest you check via the BIOS or use a multimeter instead Notice that if the power supply was only giving 10V, your PC wouldn't be running! Quote Share this post Link to post Share on other sites
Otniel Ruelas 22 Posted December 12, 2008 Motherboards rarely report voltage in Windows properly depending on your motherboard. I suggest you check via the BIOS or use a multimeter instead Notice that if the power supply was only giving 10V, your PC wouldn't be running! While I agree with your solution, that could be just one rail, the power supply has six, if the computer is using the other 5 to run, for example, that one rail wouldn't affect it. Quote Share this post Link to post Share on other sites
Russianhaxor 0 Posted December 12, 2008 Hi, I have a CM850W ESBA PSU. In Windows, the 12V rial shows it's 10V?Other hardware I have: ATi Radeon 4870X2 3xHDD's 2xDVD-Writers Can't imagine this would drop the 12V rail?... Is there sumfn wrong with my PSU? **EDIT** Some additional info: On my old Asus M3a32-MVP Deluxe mobo the 12V line was stable in OCCT stress test, But now with my new Asus M3A79-T the 12 line dropped to 10V. Maybe Mobo problem? Do you have a multimeter/voltmeter? The best way to test any power supply is to completely ignore the motherboard and any software on the operating system as almost ALL of them severely under report voltage. Quote Share this post Link to post Share on other sites
EsaT 0 Posted December 13, 2008 While I agree with your solution, that could be just one rail, the power supply has six, if the computer is using the other 5 to run, for example, that one rail wouldn't affect it.Except that so called rails are nothing more than added current limiters/circuit breakers all connected to one and same voltage sourceNeither can motherboard measure (or try to) voltage from wires other than ones through which it gets its power. Quote Share this post Link to post Share on other sites
