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Need help connecting ATI Radeon HD 4870 Sapphire

I just bought ATI Radeon HD 4870 Sapphire, it requares two 6 pin PCIE connectors, but my PSU doesn't have them.
I have 2 free Molex connectors, so i can connect only one Molex to PCIE adapter. Do I need new PSU or there is other solution?

PSU Model: ATX-550W-P4
5 answers Last reply Best Answer
More about connecting ati radeon 4870 sapphire
  1. I would assume that if the PSU don't have enough cables, it means that the PSU is not designed for that matter. I would suggest changing the PSU.
  2. You need a new PSU, even with adapters I would not run that gpu on that PSU. In fact I wouldn't recommend using that psu in any system no matter the load. For a 4870 you want a PSU with aleast 32a on the 12v rail. Your generic unit can only deliver 25a and at that load the psu is likely to catch fire and burn your house down.
    https://www.youtube.com/watch?v=Ezk9OA7aKOE
  3. I'm using this PSU about 3 years and it works good. Btw i found that my configuration recomended PSU is 420W (370W min) so i think 550W will be enought and I'm going to split 2 Molex to 4 and then use two Molex to PCIE Adaptors
  4. Hristijan147 said:
    I'm using this PSU about 3 years and it works good. Btw i found that my configuration recomended PSU is 420W (370W min) so i think 550W will be enought and I'm going to split 2 Molex to 4 and then use two Molex to PCIE Adaptors


    Keep a fire extinguisher handy.
  5. Best answer
    I wouldn't risk it. A '550W' sometimes doesn't essentially mean 550W.
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4870 6 Pin AMD ATI PCIE Sapphire Graphics Molex to PCIE HD Radeon