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07-23-08, 04:06 PM #1
Using a second power supply WITHOUT connecting to mobo
I need to do a test run of my WC loop, without using the power supply in my computer. I have a 400W kicking around, and I thought to myself, why not use that? I don't know how to get it running without connecting it to the motherboard. The stickies have links that are about connecting two power supplies to one motherboard.
07-23-08, 04:11 PM #2
07-23-08, 04:26 PM #3
07-23-08, 04:27 PM #4
07-23-08, 04:29 PM #5
Well the point is to try and get the power on. PSU's don't just turn on when you plug them in, obviously.
OP (and now I) want to know how to turn on the PSU without hooking it up to a motherboard, correct?
07-23-08, 04:35 PM #6
07-23-08, 04:41 PM #7
07-23-08, 05:00 PM #8
It's not like that. A computer power switch is a "jumper" to engage the power on and stay on.
I don't see why this is so hard to understand here... Jumper the unit together via Green to Black, and control the unit on and off with the back power switch.
07-23-08, 08:43 PM #9
What if it doesn't have a rear switch?
07-23-08, 11:00 PM #10
Then you most likely have an older P/S, using the plug from the wall will act the same as a switch. Plug it in for "on" and unplug it for "off".
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07-24-08, 03:31 AM #12
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Let me rephrase and you tell me if I'm wrong.
When the green and black pins are connected, it will stay on. Therefore, insert the jumper and use the back switch to turn it off/on.
I basically rephrased "You jumper the PSU then use the back power switch to on/off the power... Following me?" but I added the jumper part.
07-24-08, 05:04 AM #13
heheh.. i love to use the paperclip (even if i have a psu tester handy), and then pretend im getting electricuted infront of an unsuspecting client.I7 4770k @4.5| Asrock Z87 Extreme6 | Crucial Ballistix Tracer 2x4gb @1866 |
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07-24-08, 09:06 AM #14
why is everyone so confused. From what I've read, (in one wonderingsoul post)+common sense, is that you need to follow these steps:
1)make sure the PSU you're trying to use is unplugged
2)connect the black and green pins on the atx connector with a wire
3)turn on the PSU or plug in the power cord (if you have no switch)
what is everyone asking about? lol
07-25-08, 04:10 AM #15
- Join Date
- Sep 2007
That is way clearer than any of the above post...
07-25-08, 10:16 AM #16
AFAIK, and from experience, you won't electrocute yourself by holding a paperclip to the green/black to turn it on. I've done this several times, with several power supplies, with my bare hand and a paperclip, and never been electrocuted. The green wire does not supply power, and the black wire is just a ground. If you're afraid of being electrocuted still, then just hold the paperclip with a clothespin or something. All you need is a momentary contact (while the power supply is plugged in and switched on) to start it. Stick the paperclip back in for 5 seconds or so and it will turn off. Just make very sure to only hit green and black or you're likely to fry something.ASRock 990FX Extreme9 - FX-8350 - 32GiB 1600 Crucial low-profile 1.35v - 7970 3GiB - 8.1 Pro x64 / Gentoo amd64 - AX760 - Crucial M550 x ~5 TB
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07-25-08, 10:22 AM #17
07-25-08, 10:42 AM #18
Premium Member #3
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You have to leave the "short" in to keep the PSU on, it isn't a momentary switch...
If you short green to ground, the PSU will turn on. If you remove that short, it will turn off. This is NOT like the motherboard power switch.Desktop: Gigabyte Z77X-UD5H | 3570k | 32 GB | GTX 770 Classified | 1 TB Samsung Evo & 2 TB HDD | Windows 3.1 | 4x 2560x1400 Monitors
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07-26-08, 05:04 AM #19
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and believe me, there is no way to electrocute yourself while doing this. The PSU can be plugged in, the back power switch can be on, it doesn't matter. the connectors are sensors and do not carry any electric load.Opteron 170 2.8ghz 1.49v (280x10) ---------> Xeon x3220 (G0) 3.83ghz 1.55v (425x9)
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07-26-08, 12:06 PM #20
forgive me if this is off topic but how the hell do you 'fry' a paper clip? what happens? does it melt or break in two -or does something far more mysterious happen?