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New TX750W, power issues


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I have just purchased a new graphics card, and decided to upgrade my PSU at the same time (Old PSU was coolermaster RS-430-PCAR) because it only has IDE power cables, no PCI-E cables & only a EPS/ATX12v 4pin (2x2). All my sata devices currently run off add-on extenstion cables off IDE power connections, and my 8800GT was also running from IDE power connectors.


so i installed the tx-750w into the case hooked all the power, plugged in all the rest of the computer stuff. put the case back together powered it up and it didnt work :(


all i can tell you is the case fans, graphics card fans & cpu fans spin for one tenth of a second or less then stop spinning for a tenth of a second then repeat for ever. is the power supply dead on arrival?


Steps i've tried (to no avail):

  • Re-seat all cables
  • Un-plugged all components so to leave just the 24pin and 8pin in use
  • remove all but 1 dimm of ram
  • split 8pin and just use 4pin
  • plug in old PSU just to test, all worked


what else should i try?


motherboard is Gigabyte MA785GM-US2H

Ram is 2x1gb Coarsair CM2X1024-6400C4DHX + 2x2gb Coarsair CM2x2048-6400C4DHX (4 dimms,6gb in total)

CPU is AMD 4600+

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