might as well hop on the bandwagon:
...i haven't had any problems yet, it's dead silent as well, can i ask for more? i'd say 400w would only be needed for high end raid setups or dual processors...
Looking at your setup (which is very close to what I am planning), and working from Tomshardware figures and the AMD "100% CPU load plus 80% of all other loads" rule, you're actually past the 15A max load the Nexus is rated for on the +12v rail... better not try any overclocking!
Unfortunately, an "upgrade" to most quiet 400 watt PSUs won't help - most of these units (including the SilenX) put all the extra power on the 3.3 and 5 volt rails for some reason, leaving the 12 volt rail at 15A
. The only ones I have found that seem to buck this trend are the 400/460w "Ultra-quiet" PSUs from quietpc.com.
I'm not arguing with the general consensus here that in most cases, virtually all of the time even heavily loaded systems will run well on a good 300 watt PSU. But from problems reported on other forums, PSUs that even momentarily
get close to their limits are much more likely to experience voltage drops on their rails, which can cause instabilities (lockups, looping, etc.), especially for overclockers. That 30 millisecond spike in demand every 8 hours, if it causes your system to crash, is the one spike you want to be prepared for. To give but one example from forums, some Intel 845PE chipset motherboard owners have reported problems cold booting with nominally "OK" PSUs because the momentary draw on drive spinup etc. is just too much for the PSU to reliably support at the right voltages
. I for one intend to err on the side of caution in PSU choice, as I will be doing some mild overclocking...
A related point for overclockers to consider is that some of these very quiet 1-fan PSUs push so little air that case temps (already raised by o'clocking) could rise enough that thermostatically-controlled CPU heatsink fans are triggered to run faster and louder, or a need could arise for more case fans, thereby obviating the noise reduction benefit of the PSU.