Using an Older Power Supply on a New Motherboard


The motherboard in my PC finally died. I purchased a Gigabyte 78LMT-USB3 and a AMD 4100 FCX CU for it.

My computer has an older Antec 450W power supply. The motherboard has an 8 pin connector on it. My power supply has a 4 pin and a 6 pin PCI connector. I do not have a separate graphics card and wont overclock the CPU.

The motherboard specs say that the 8 pin connector is an ATX 12V ( it doesnt say eps)

My question is this should I:

1.) Plug the 4 pin connector into the 8 pin on the motherboard
2.) Purchase a 4 pin to 8 pin Roswill adapter

I looked up power supplies and they all seem to come with the 6 plus 2 connector, including this power supply, Thermaltake TR2 TR-500 500W ATX12V v2.3 SLI Ready CrossFire Ready Power Supply which tiger direct includes in a bundle for this motherboard.

Thanks in advance for the help!

5 answers Last reply Best Answer
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  1. Best answer
    Purchase a 4 pin to 8 pin Roswill adapter
  2. Thanks for the quick feedback!
  3. You should be able to plug the four-pin into four of the eight pins (one side or the other, not the middle four). Do NOT try to plug a 6+2 pin plug into the mobo power connector; it shouldn't fit, but might be able to be forced, so DON'T; that's a graphics card power connector and is wired differently.
    The Thermaltake TR2, if the older version (I'm sure it is, with a little voltage switch on it), is NOT a good PSU. Consider it good for no more than ~430W.
  4. Agreed with everyone else, use a 4 to 8 pin converter, or just plug in your 4pin and hope it works. as Onus said don't use a 6+2, and I think it might fit IF you put it in upside down. I had a user do this a while back, not pretty. Fried his board. (12v going into grnd)

    Regardless of what wizardry he used to get it in there.... Just... no...
  5. Thanks everyone for their feedback and help!
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