Hooking up Power Supplies without them being in the case, doable?

[Falling Anvil]

Let's say I want to test a power supply, but my present rig already has one in and it's either very hard to pry out of the case or I'm feeling lazy(or both). Instead of doing that, what if I set the new power supply beside the case, hook it up to the motherboard/hard drives/DVD drive while the unit is outside of it, and then test it there? There doesn't seem to be anything keeping that arrangement from working, though I'm not an expert at that kind of thing. What does everyone here think? Would it work or not?

 

[302efi]

Theres way to jump the 20 pin connector with a wire and it will turn on...I've done it before...but I'm to lazy to find the link


EDIT: Here you go :

http://www.duxcw.com/faq/ps/ps4.htm

 

[Falling Anvil]

I'm not looking for that though, my test would be a bit more extensive than the paperclip test.

 

[Arcygenical]

Works just fine. This is how I tested my system with my new HX620 after my Ultra XVS 600w went boom

 

[Falling Anvil]

Ah, thank you.

 

[digital_exhaust]

Although having one of these handy never hurts either....

 

[Dave3d]

I would be afraid to do that, as the case will no longer be grounded.

But thtas just me.