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What is the min PSU for HD 4850?

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January 15, 2010 3:30:05 PM

I have a 400w, 12v1 - 18A, 12v2 - 17A power supply. It says that the loadlimit on the rails is 300w???
Will this run a HD4850? I know it is not the recommended PSU.

More about : min psu 4850

a b ) Power supply
January 15, 2010 3:33:27 PM

What PSU is it? If it is a good quality one, I think it ought to run it fine. If it is a cheap one, it might not work well, and possibly damage things.
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a b ) Power supply
January 15, 2010 4:42:55 PM

The recommended minimum from ATI or anyone else is generally a good bit more than you actually need. A decent 400W supply should be more than enough.
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January 15, 2010 6:20:15 PM

flyinfinni said:
The recommended minimum from ATI or anyone else is generally a good bit more than you actually need. A decent 400W supply should be more than enough.


How do I know if it is good. This is a "Delta". The rails are 18 and 17 amps.
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a b ) Power supply
January 15, 2010 7:02:23 PM

Delta :p 

Well, it's not horrible. If the rest of your system does not draw too much power then it should be o.k., but personally I would recommend purchasing a quality PSU of at least 450W. Well, you can get away with a 380W Antec Earth Watts or a 400W Corsair/FSP/ or PC Power & Cooling.
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January 17, 2010 4:23:01 PM

OK. Same question with a HD 4770. It is more efficient but still calls for 450w. Would I be "safer" with that card? And would the poosible damage give me warning signs?
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a b ) Power supply
January 18, 2010 1:31:46 PM

I think they recommend a min of 450W or more for any GPU that requires a 6pin PCI-E power connector. the 4770 does use less power than the 4850, so you would be safer with that. If the card is underpowered, you'll probably know pretty quick because you'll probably get poor performance, artifacts and things like that if it is.
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