This 500w ATX power supply is perfect for building your RepRap style 3D printer or any other 3D Printer build where you need clean and reliable power to your RAMP's board. Easy to hook-up and is the model that is very well documented in all the RepRap guides for building the Prusa Mendel and Mendel90. This is the same power supply we use on all our MakerGeeks.com kits and built and we have never had a bad experience with these - I know you'll like this solid little power supply as well.

Features:
480-watts
One (1) 120 mm (4.72-inch) fan
115V, 230V switchable power supply
Compatible with ATX 12V 2.3, 115/230V AC input technology
High energy efficiency
Over Current Protection (OCP)
Over Voltage Protection (OVP)
Under Voltage Protection (UVP)
Short Circuit Protection (SCP)
Over Power Protection (OPP)
Under Load Protection (ULT)
20+4-pin cable
 
Connectors:
One (1) 14-inch 20+4-pin ATX power connector
One (1) 4-pin CPU power connector
Two (2) SATA power connectors
Two (2) large Molex 4-pin power connectors
One (1) 4-pin Floppy power connector
 
Specification:
 
Power Specifications:
AC Input Specifications:
115V/230V, 10/5A, 50/60Hz
 
DC Output Specifications:
+3.3V, 22A
+5V, 30A
+12V, 22A
-12V, 0.8A
+5VSB, 3A
 
Unit Dimensions:  3.25 x 6 x 5.4-inches (H x W x D, approximate)
 
Regulatory Approvals:
FCC
CE
TUV
BSMI
WEEE