Recently tried using a 1kw PSU that uses a 20 pin for cpus instead of the 4 pin (Precision 690). Do I need to use a converter or will it run without a CPU connector? Everything was free.
this is a cpu power connector
this is a 20 pin motherboard connector
i think you are getting things messed up
if it is a atx spec power supply, then if it has the same pin number and looks the same shape then you should be good
now if it is a cheap chinese knockoff of a power supply then throw it out.
but to answer your question then no get a molex to 4 pin cpu power adapter
Dell power supplies are made for their proprietary motherboards and aren't quite ATX standard. Read this and see what you can switch around
http://www.playtool.com/pages/psuconnectors/connectors.html
Go here for connectors
http://www.frozencpu.com/cat/l2/g44/c155/list/p1/DIYMod_Parts-Connectors_Pins.html