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How can i tell if my psu is dead or not?

I have a computer that has been freezing on me many times so I took a quick peek at the hardware and found out 1 of the psu fans wasnt working because of a cut wire. I took the psu out to replace it with another psu but it didnt have the right cords for the mobo. I plugged in the cords to the mobo anyways. The mobo needed one of those 8 thing connector thingys instead of the default 4. I dont know what you call that but i hope someone knows what im trying to say. Anyways after i put those cords in i tried to turn on the pc. the pc would not boot. Then I took apart my old psu and taped the cut wires together and put the psu back into my pc. After i plugged everything into the right places, i tried to turn it on. The pc would not turn on again.

Now I don't know why my pc wont boot. It was booting fine before I did all of that(explained in the paragraph above.) And also I would like to note that the mobo LED light turns on with both psu's. So that is really trippin me out. I dont know if my psu is dead or not because the LED is on. How can I tell if my psu is dead or not?

Please if you see what I did wrong here, let me know so I can hurry up and buy a new part to fix it. I dont know if its the psu,mobo, or case thats at fault. >_<
8 answers Last reply Best Answer
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  1. When you plugged in the 4pin did you damage the connector on the board? http://www.playtool.com/pages/psucompat/compat.html
  2. i know putting the PSU in another comp is a way to test your PSU. i did see that pulled one from an old PC. does your PSU from the old comp meet the requirements of ur new comp? and was wondering if there are other ways to test my PSU
  3. i dont think i damaged the connector. If i plug in a 4pin into an 8pin slot, will the mobo break? and if i plug in a 20pin into a 24pin slot, will my mobo break?
  4. from what i have read no. the 8pin (unless your using a lot of power consumption) is more like a safety feature. not so sure about the 20/24 pin but i would think its the same as the 4/8 connector
  5. i have just decided to buy a new psu. I am having a hard time finding one because I need one that has the 8 pins for the motherboard. The 8 pin thing im talking about is usually between the ps2 ports and cpu. And its usually a 4pin. For some reason this computer is the only one Ive seen using 8 pins. Anyways can someone post some links for power supplies under $75.

    My specs are

    Intel Quad Core 2.6ghz
    2x 1GB ddr2 Corhair ram
    1x500gb HDD
    1xCD/DVD Drive
    5xFans
    8600gts
  6. http://www.newegg.com/Product/Product.aspx?Item=N82E16817341016&cm_re=ocz_psu-_-17-341-016-_-Product

    thats what im looking to get but i want someones opinion first.
    the mobo this psu is going to be connecting to has an 8pin thing instead or the normal 4 so im wondering if this one will fit.
  7. Best answer
    sunhashin said:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817341016&cm_re=ocz_psu-_-17-341-016-_-Product

    thats what im looking to get but i want someones opinion first.
    the mobo this psu is going to be connecting to has an 8pin thing instead or the normal 4 so im wondering if this one will fit.

    That is good for the price (after MIR) and has all the connectors you need.
  8. Best answer selected by sunhashin.
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