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AMD 7700 HD Series Power Requirements.

Tags:
  • Power Supplies
  • Hewlett Packard
  • AMD
  • HD
  • Graphics
Last response: in Graphics & Displays
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August 13, 2013 4:38:16 PM

Hey guys, I have an HP pc

AMD Phenom II x4 820 @2.8 GHz
8GB Ram
300W Bestec atx0300d5wb Power supply , with no 6-pin ( I can use 2x molex to 6-pin )

so i'm planning to buy 7750 HD or 7770 HD or the 7790 HD
i'm not planning to upgrade my PSU

but i heard that my PSU can't handle any of them , please tell me if it handles the 7790 HD if not , does it handle the 7770 HD ?, if not does it handle the 7750 HD?

Thankss!!!

More about : amd 7700 series power requirements

a b ) Power supply
a b À AMD
August 13, 2013 4:45:19 PM

I would definitely not run a 7790 on it.
A 7770 would be pushing it but it would probably work.
A 7750 would run safely.
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August 13, 2013 4:47:56 PM

Your power supply should handle the HD 7750 with no problem.
I would recommend upgrading to at least 450W for HD 7770 or HD 7790.
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Best solution

a c 131 ) Power supply
a b α HP
a b À AMD
August 13, 2013 4:51:45 PM

Bestec has offered some of the worst in the business; they had one 300W PSU (model ended in -12E) that had motherboard-killing +5VSB spikes.
Assuming that isn't a -12E, you should be able to run a HD7750 on it, but that's it. It doesn't have enough amperage on its +12V rail(s) to safely use adapters to power any card needing a PCIe power cable.
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August 13, 2013 5:18:27 PM

it delivers 18 AMPs at 12+ rail

@Onus
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a c 131 ) Power supply
a b α HP
a b À AMD
August 13, 2013 5:53:56 PM

It claims to deliver 18A on +12V; being a Bestec, that may not be true. I wouldn't count on it for anything more than 15A-16A. Fortunately, that is indeed enough for the HD7750.
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a b ) Power supply
a b À AMD
August 13, 2013 6:02:35 PM

Not to mention that 18A isn't exactly alot. 216w
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August 13, 2013 6:09:27 PM

Thanks a lot guys , @smeezekitty , i can't choose 2 best answers but you also helped me thanks :D 
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