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ATI HD7770 + Seasonic power supply 750W

Last response: in Graphics & Displays
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December 19, 2013 6:19:49 AM

Hi All, Just joined!!! :) 
I am upgrading my PC and I have already bought a new motherboard M5a99fx pro r2.0.
My CPU is phenom ii x4 955 black edition and Corsair 4 GB ram.
My question is i m really intereested in buying HD7770 (an upgrade to my current 5770), but i heard it needs an auxiliary psu. My current PSU is seasonic 750w 80 silver.

Will it be enough, or do i need to invest in an auxiliary PSU? Thanks in advance
a b ) Power supply
December 19, 2013 6:24:51 AM

It is more than enough.
If you can afford it, then you could get a much stronger GPU in that PSU.
In fact, you can fit 2 titans in that PSU.
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a b ) Power supply
a c 172 V Motherboard
December 19, 2013 6:30:48 AM

You could run 3, maybe 4 HD7770s. :D 
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a b ) Power supply
December 19, 2013 6:31:58 AM

Novuake said:
You could run 3, maybe 4 HD7770s. :D 


Actually, 6.
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a b ) Power supply
a c 172 V Motherboard
December 19, 2013 6:34:28 AM

cst1992 said:
Novuake said:
You could run 3, maybe 4 HD7770s. :D 


Actually, 6.


Not if you consider the rest of the system. But maybe.
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a b ) Power supply
a c 128 V Motherboard
December 19, 2013 6:39:10 AM

Measured power consumption R7770
1.System in IDLE = 155W
2.System Wattage with GPU in FULL Stress = 231W
3.Difference (GPU load) = 76W
4.Add average IDLE wattage ~10W
5.Subjective obtained GPU power consumption = ~ 86 Watts

Radeon HD 7770 - On your average system the card requires you to have a 450 Watt power supply unit.
Radeon HD 7770 Crossfire - On your average system the cards require you to have a 550 Watt power supply unit as minimum.

So you are fine to go, don't worry. And Seasonic is a solid PSU. You can increase RAM to 8GB will help on games.
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December 19, 2013 7:01:20 AM

cst1992 said:
It is more than enough.
If you can afford it, then you could get a much stronger GPU in that PSU.
In fact, you can fit 2 titans in that PSU.


Wow!! Thnks for the quick reply. I know this needs another post but if you can please suggest any other GPU better than the HD7770 that I am intending to buy in or about the same price range. That woul be great!! :) 
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Best solution

a b ) Power supply
a c 172 V Motherboard
December 19, 2013 7:03:51 AM

If you are planning to game at 1080p then I would suggest you get at least an HD7790 2GB or a GTX650 ti Boost 2GB.

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December 19, 2013 7:10:04 AM


Thanks for all your answers,really appreciate. :) 
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a b ) Power supply
a c 172 V Motherboard
December 19, 2013 7:12:22 AM

No problem. :) 
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December 19, 2013 7:17:41 AM

Upgraded my 5770 to a 7770 some time ago (I killed it lol) and its not bad at 1080p, 7790 is better no question :) 
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December 20, 2013 2:00:11 AM

I have decided to buy AMD Radeon HD 7790 1GB. 2 GB is expensive for me :( 
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a b ) Power supply
December 20, 2013 6:23:32 AM

shijin13 said:
I have decided to buy AMD Radeon HD 7790 1GB. 2 GB is expensive for me :( 

It'll do you just fine.

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