Hey there
 
Recently I assembled myself a completely new system:
 
E6750 Duo Core
2x1GB Crucial Ballistix PC6400
Asus Maximus Formula
ASUS EN880GTS 512MB
Antec Phantom 500W PSU
 
The thing is, after installing Everest, my rail voltages seem rather low: 5V is 4,94, 3V is 3,21 and 12V is 11,76.  
 
This isn't really that much but I've been having quite a bit of problems with this setup without finding a reasonable culprit. I'm now looking into if it could be the PSU, so any help is appreciated.  
 
By the way, I'm completely clueless when it comes to anything regarding a PSU, so please bear with me    
 
Thanks in advance!

Tolerance is 5% per rail. What problems are you having? Using a Digital Volt Meter would give more accurate voltage readings.

I'll second using a more accurate means to test voltage.  Invest $13 or so in a PSU tester.  Still, those voltages appear to be within tolerance.

I kinda figured that it was within tolerance, but still thought it might be worth taking a look at since they are all low.. But if you don't find it alarming I'll try solving my problem another way
 
In short I've been having problems with both my RAM giving errors (probably bad), also not being able to install a certain PCI WiFi card.  
 
It's probably my mainboard then

go get a dmm to measure the voltage, the software measurement is base on the sensor reading, it could be off