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I connected a new 6 pin pci e cable from my modular psu to gpuand pc wont switch on

i was running power to r9 270 through to molex connectors with a 6 pin adapter but replaced psu for a tx550m semi modular which came with no 6pin to 6pin for gpu so i continued running on molex to 6pin config but i bought a 6pin to 6pin pci e cable and fitted it today and pc started up but green led on gpu was not on instead had a red one so i paniced abit an cut the power by first trying front panel then pulling the mains lead out the psu now when i try to turn on nothing happens except light under mouse comes on , (first comma lol) ive removed gpu an refitted my original psu a cit 500w and checked psu plug fuse wall socket outlet ,ive checked cpu and 24 pin connections and any oters i remade refitting old psu and i fear the worse but is there anything else i can try before i go out and buy .my set up now is below but when fault started set up was with psu and gpu mentioned above
a10 7850k
8gb x1 1600mhz
asrock fm2a55m-hd+
cit 500w
any help would be great
Thanks
13 answers Last reply Best Answer
More about connected pin pci cable modular psu gpuand wont switch
  1. If this is your PSU, it should have had 2 x 6+2 pin connectors included: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139032
    Or was the PSU used from someone that didn't have all the parts?

    What was this "6 pin to 6 pin" PCIe cable you bought; can you provide a link to it or a pic?
  2. clutchc said:
    If this is your PSU, it should have had 2 x 6+2 pin connectors included: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139032
    Or was the PSU used from someone that didn't have all the parts?

    What was this "6 pin to 6 pin" PCIe cable you bought; can you provide a link to it or a pic?


    http://www.ebay.co.uk/itm/310880394973?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
    this is the cable i bought
    and below is the ad for the psu that i also bought
  3. Best answer
    Do you have any idea if that 6 pin cable was wired the same as your PSU's modular receptacle is?
    It looks like you bought a used PSU that didn't have all the parts. If the pic is the one you bought, it has a (home-made?) molex to 6 pin adapter in place of the 2 x 6 pin cables that would have come from Corsair.
    Take a voltmeter and check if the yellow wires from the new cable are (+12V) and the black are (-12V) If you have voltage between any of the same color wires, you have a dead short. If you can't get any reading from the cable at all, the PSU is probably shot. And it may have killed the motherboard if you can't get a known-good PSU to start the system.
  4. i did buy a second hand psu with no lead never again i new it was fools gold but couldnt resist the savings or so i thought ive refitted the old psu a cit 500w but nothing happens except mouse light is on ive ordered a new msi a88xm-35 motherboard today and wont be using the lead or the tx550m ill keep using cit 500w and save up for a decent psu thanks for your reply one more thing im curios about is when i was on pc last i was running a benchmark test with hwinfo on and it showed gpu as only using 24.0 wat while gpu in 99 percent use this was when i had gpu connected thru a six pin to 2 molex adapter 24.0 wat seems really low i thought but it worked as good as ever scoring 30 fps on ultra on uniengine i think anyway my point is 24.0 wat gpu power used as monitered by hwinfo64 on ful load running uniengine benchmark hope that make sense seems really low thats all
  5. what do you think of this psu or would you recommend another dont want to spend too much and thanks for your feedback

    http://www.ebay.co.uk/itm/121325099037?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
  6. The R9-270 is a 150W (TDP) card when topped out, which it sounds like it was if it was at 99%. http://www.hwcompare.com/16547/radeon-r9-270/
    You may be looking at the GPU VRAM of the card and not the GPU CORE. There are 2 different sections on Hwinfo.
  7. It is good

    look at this list: http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html

    You will see that it is in Tier two class A
  8. thanks guys btw does 24.0 wat sound like a gpu vram read out ?
  9. Corsair sells replacement cables for the TXM series, the full pack of custom sleeved ones is $80, but they sell individual cables for most of their other line ups, email their support and see if they can sell you a PCI-e cable for the 550TXM
    http://www.corsair.com/en-us/professional-individually-sleeved-dc-cable-kit-type-3-generation-2-black

    Odds are the pinout on the spot on the PSU and the PCI-e connector are not straight through, the PCI-e cable has all 12V lines on the top, and all ground lines on the bottom, but if corsair decided to split it left-right because it made routing easier in the PSU a straight through cable won't work, and suddenly they have a market for accessories! I'll try to find a pinout of your PSU to confirm.
  10. jimski53 said:
    thanks guys btw does 24.0 wat sound like a gpu vram read out ?


    Exactly!
    The Antec is a good PSU... if you buy it new.
  11. thanks hunter that would be great what damage do you think i have done by using a straight thru lead when i should of got the correct corsair one ive already ordered a new motherboard but could it have damaged cpu ,gpu ,ram or even the psu itself
  12. thanks grandmaster :)
    knowledge is power and i have none but im learning lol thanks for all the replies i get it know just hope when i fit the new board the cpu and gpu and ram are ok what do you think would this scenerio have stopped at the motherboard or killed the lot
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