[NAME]  8940 uses Dell proprietary 6/4/4 pin TFX psu. This is partially incorrect. [NAME]   DELL proprietary is NOT TFX and a TFX unit will not FIT. 8940 Power supply is SMALLER THAN TFX which you can see by looking at the rear where the power supply is mounted. The other issue is that TFX12V power supplies combined output of the +3.3VDC and +5VDC rails is less than 61W. This does not meet the bare miniumum 140W required by dell. All of these specifcations are clearly documented.  Power supplies are not a single rail or a single spec of WATTS. Upgrade PSU is Specific Y7R0X 500W Chicony = XPS 8940, G5 ,Optiplex 7080 MT/XE3 [IMAGE]   [IMAGE]Note the larger Size for TFX  
I am waiting on delivery of a new XPS 8940 In reading many reviews and feedback in the Dell Community, I’m worried that the 360PSU with the 360W Night Sky Bezel Chassis including optical drive Is going to be underpowered? The configuration ordered includes: And I am hopping to add: Based on the information I see, this hardware configuration with the 360 Watt Power Supply will be underpowered? I am also considering adding a 1 or 2 internal fans to help temperature if needed. I tried to get a price to upgraded PSU to 500 Watts, but can not find it. Based on the configuration, would you suggest the more powerful PSU?  And what would the price be to do this upgrade?  ASAP? Please advise on any suggestions on what I can / should do?   Regards
XPS 8940, 360W PSU underpowered?