http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-950/specifications
As per nVidia
950 Thermal and Power Specs:
95 C = Maximum GPU Tempurature (in C)
90 W = Graphics Card Power (W)
350 W = Minimum System Power Requirement (W)
1x 6-pins = Supplementary Power Connectors
As per Guru3D
Here is Guru3D's power supply recommendation:
GeForce GTX 950 - On your average system the card requires you to have a 400 Watt power supply unit.
If you are going to overclock your GPU or...
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-950/specifications
As per nVidia
950 Thermal and Power Specs:
95 C = Maximum GPU Tempurature (in C)
90 W = Graphics Card Power (W)
350 W = Minimum System Power Requirement (W)
1x 6-pins = Supplementary Power Connectors
As per Guru3D
Here is Guru3D's power supply recommendation:
GeForce GTX 950 - On your average system the card requires you to have a 400 Watt power supply unit.
If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.