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Power supply for hd 5770

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February 5, 2011 5:46:11 AM

Hello,
i am buying an XFX ATI Radeon HD5770. The processor is AMD Athlon II X4 640 which consumes 95watt and the motherboard is MSI 760GM-P33.So should I buy a 500watt power supply or a 550 watt power supply?

More about : power supply 5770

a c 85 ) Power supply
February 5, 2011 6:06:04 AM

Depends on who makes it. I wouldn't use any PSU from Athena, diablotek, or other low end providers.

Your CPU is 95W, lets toss in another 50W for board, drives, etc and call it 150W. The TDP for the 5770 is 108W, so you'll need around 260W on the 12V rail. Any quality PSU that has 22A on its 12V rail(s) should be fine. Look at Antec, Corsair, Seasonic, or XFX. 380-450W should be fine.
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a c 85 ) Power supply
February 5, 2011 8:26:01 AM

Quote:
Corsair VX 450W - 33A on a single +12V rail
Corsair CX 430W - 28A on a single +12V rail
PC Power & Cooling Silencer 420W ATX - 30A on a single +12V rail
Corsair CX 400W - 30A on a single +12V
PC Power & Cooling Silencer 370W ATX - 27A on a single +12V rail


Why suggest these if they don't have enough amps (according to you)? If he needs 34A you should be suggesting PSUs with enough amps on them.

OP, this is probably your best and cheapest bet.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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a c 85 ) Power supply
February 5, 2011 9:02:35 AM

OP, don't worry about the list, you don't need 34A to power the 5770. As I said before anything 22A or better will be fine. I stand by the corsair I linked.
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a c 85 ) Power supply
February 5, 2011 9:47:26 AM

Naeem, look at the charts that Diggle provided. The highest power draw is 251W. What estimate did I give you? 260W. I was 9W off. Again, you don't need a 34A or 40A PSU, one with 22A+ will be fine. (I'd get a bit extra to have some wiggle room.) A 28A Corsair 430W builder series like I linked is fine.

Looking at your user name, are you in the USA? Can you buy from newegg? If not, what PSUs in the 380-500W range are available to you?
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a c 80 ) Power supply
February 5, 2011 10:22:34 AM

It may be better when you post that list to mention these specs are to include all those no name 500 watt psus.

I am just saying this as clearly your charts show the cards do not draw that much power in an average system.

I personally have a 5770 in my MCE system and it is paired with a nice 300 watt psu.

That CX430 should work fine.
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a b ) Power supply
February 5, 2011 10:42:36 AM

The 5770 is pretty low powered as everyone has stated. Just try to find something around 30 amps and you will be fine.
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February 12, 2011 3:06:25 PM

4745454b said:
Naeem, look at the charts that Diggle provided. The highest power draw is 251W. What estimate did I give you? 260W. I was 9W off. Again, you don't need a 34A or 40A PSU, one with 22A+ will be fine. (I'd get a bit extra to have some wiggle room.) A 28A Corsair 430W builder series like I linked is fine.

Looking at your user name, are you in the USA? Can you buy from newegg? If not, what PSUs in the 380-500W range are available to you?


well i dont live in usa! And the best available PSUs in my country are of Thermaltake!! So most probably i'll be buying a Thermaltake 500W for safety coz there are sometimes voltage problems in my country!!btw thanks alot!
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a c 85 ) Power supply
February 12, 2011 3:26:58 PM

What models from ThermalTake? (TT) They do have some good lines. They have others that you should never run.
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!