Grigori Posted December 2, 2013 Share Posted December 2, 2013 The system containing the HX-750 was assembled in May 2012 and has been completely stable and unmodified since the initial build. Last week I began to notice a vibration in the case that got progressively louder over the course of a couple of days. The noise would cycle in intensity over the course of several minutes and I was able to trace this to the cycling of the power supply fan. This was occurring even under light usage where the system is only drawing about 145 watts. Since audio and video editing is one of the primary uses of this machine, quiet is very important. In response to the noise problem, I purchased an Obsidian 550D case and was planning to transfer the system to this case tomorrow. Earlier today, however, I suffered a complete power failure, no BSOD, just instantly dead as if the system was unplugged. Power is supplied through a 1350 VA sine-wave UPS which is in good working order. Initially, the system would not restart, but after cycling the PS power switch I was able to get the system restarted. Looking at user comments at Newegg and Amazon, there appears to be an unusually large number of complaints on early failures of the HX-750. I've always had good luck with Corsair (I have a VX-550 that's run for many years), but I'm not sure which way to go with the current system. Link to comment Share on other sites More sharing options...
Yellowbeard Posted December 2, 2013 Share Posted December 2, 2013 Try it without the UPS and see how it does. Link to comment Share on other sites More sharing options...
Grigori Posted December 3, 2013 Author Share Posted December 3, 2013 I powered the system down last night and bypassed the UPS. The system is running fine but the vibration issue continues to get worse, so I suspect that the bearing of the PSU fan is failing. I am going to set up the new case with another power supply that I have available. Another question. Do high efficiency power supplies have problems with UPS's. We have good quality power but are susceptible to power failures in storms. We have a 20kW generator that automatically starts in case of a failure. I am concerned about bad things happening when the transfer switch kicks in. Our computers, modem, router, and DVRs are all on UPS's. Link to comment Share on other sites More sharing options...
Grigori Posted December 4, 2013 Author Share Posted December 4, 2013 I transferred the system to the Obsidian 550D case today. In the process of doing so, I discovered that one of the motherboard screws had worked itself loose and may have been responsible for the increasing noise that I was experiencing. Therefore I went ahead and used the previously suspect HX750. Everything is quiet now! By the way, I was surprised that mounting holes on the HX750 did not match up well with the Corsair case. I got three screws in, but I was barely able to get the two bottom screws to thread. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.