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Will My 300W PSU Power a Radeon HD 7770?

Zackery Toler
By Zackery Toler
in Troubleshooting
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Go to solution Solved by Mira Yurizaki,

It really depends on how much amperage the 12V rail is providing. But if it's at least 20A (or 240W of power), I don't see any real problems. Wiki claims the HD 7700's TDP is 80W so with a SATA power adapter plus PCIe power, that should be plenty.

Posted

I purchased a refurbished HP Pavillion last year for about $100. It’s rocking an i5-2400, 8GB RAM and a GT 710 (didn’t come with machine, was gifted to me by a friend). All of that is running off a 300W OEM PSU that I’ve no way of upgrading because for some inexplicable reason there is no 24-PIN on the motherboard. I’m planning on purchasing a Radeon HD 7770 (found a great deal) and was wondering if my PSU was up to the job. Also, I’ve no spare six pin connectors on the PSU but I’ve plenty of SATA cables. I saw this adapter that would provide me with a six pin in exchange for two SATA connectors. Will this work?

 

The machine’s primary purpose is gaming. It’s rarely at idle: I use other devices for my general computing needs.

 

Much thanks in advance!

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Honestly, I'd lean towards not a chance myself....

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The only true wisdom is in knowing you know nothing. - Socrates
 

Please put as much effort into your question as you expect me to put into answering it. 

 

  • CPU
    Ryzen 9 5950X
  • Motherboard
    Gigabyte Aorus GA-AX370-GAMING 5
  • RAM
    32GB DDR4 3200
  • GPU
    Inno3D 4070 Ti
  • Case
    Cooler Master - MasterCase H500P
  • Storage
    Western Digital Black 250GB, Seagate BarraCuda 1TB x2
  • PSU
    EVGA Supernova 1000w 
  • Display(s)
    Lenovo L29w-30 29 Inch UltraWide Full HD, BenQ - XL2430(portrait), Dell P2311Hb(portrait)
  • Cooling
    MasterLiquid Lite 240
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  • Solution

It really depends on how much amperage the 12V rail is providing. But if it's at least 20A (or 240W of power), I don't see any real problems. Wiki claims the HD 7700's TDP is 80W so with a SATA power adapter plus PCIe power, that should be plenty.

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Dang, I’ve just got 16A on the 12V rail. Don’t suppose 320W would make a difference? ? 

 

Anyways, thanks again for the help! Much appreciated.

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