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New PC - PSU advice needed

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December 28, 2010 1:31:27 PM

Hi guys im currently putting together some ideas for what i need to buy for my new pc. My 550w PSU died the other day and i am going to upgrade my hardware so i was wondering if a decent 550w would be sufficient.

I am intending to get :
AMD Athlon x4 @ 3GhZ
Cheap AM3 800 chipset mobo
2x2gb DDR3 PC-12800 RAM @ 1600Mhz
Radeon 3870 gpu - 1gb

I think that GPU asks for 550w alone, i know thats recommended, but does the processor need another load ontop of that too?

I was looking at a 750W one, but i'm sure you guys would have a better idea than i would!

As always, any help is appreciated and would be a massive help!

Thanks guys!

More about : psu advice needed

a b ) Power supply
December 28, 2010 1:36:19 PM

Newegg has the antec ea650 for $50 in one of it's current email promos. Can't remember if you need to submit a rebate. It should work fine with your system.
a b ) Power supply
December 28, 2010 1:50:42 PM

You don't need that much power, a decent 450w would cover your needs unless you are thinking of adding a 2nd card then you would need a 550w.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The higher powered ones are for a 2nd card, the Seasonic 520 would be my pick for your current setup.
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December 28, 2010 1:52:07 PM

Hey man, thanks for your quick reply, i'm from the UK so i can'tt buy from the US without paying customs handling charges. That PSU costs £70 here which is like $100! I can get a corsair 750W for £90 and a 650W for £70, will a 650 definitely be ok with that system, i saw that my processor says 125W edition, with my GPU that would be 675. I know that they're jut covering themselves by saying that, but i'd rather be safe than sorry, so to speak!

Thanks again!
December 28, 2010 1:55:15 PM

beanoslim said:
You don't need that much power, a decent 450w would cover your needs unless you are thinking of adding a 2nd card then you would need a 550w.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The higher powered ones are for a 2nd card, the Seasonic 520 would be my pick for your current setup.


Thanks for replying mate and also for clearing that up for me, i know that corsairs PSU's are made by seasonic, so i'm guessing their equivalent would be ok for my PC. I think i'll get a 550W Corsair if that's the case as im not sure if you can buy them in the UK, i;ve not seen any on the online retailers i use anyways! But yeah, thank's a load, you have just saved me £40 :D 

Everybody on here is so helpful :o  thumbs up to all :) 
December 28, 2010 2:41:50 PM

beanoslim said:
I'm UK but default to Newegg. :D  I use Scan in the UK, good prices and reliable delivery.

You could run your current setup with a 450w but the price of the 500w is about the same so you might as well have the extra horses.

http://www.scan.co.uk/products/550w-corsair-cmpsu-550vx...

http://www.scan.co.uk/products/650w-xfx-xxx-edition-mod...

http://www.scan.co.uk/products/620w-seasonic-m12ii-620-...


Ahh, i didn't realise many people from the UK came on here! I'm looking at overclockers and aria mainly, i forgot about scan! I found this corsair 600w one :

https://www.aria.co.uk/Products/Components/Power+Suppli...

is that ok, it's a bit cheaper than anything else i can find! If not i think that 550w one you picked out sounds good, going to look on scan now and see if i can get any of the others bits i found a bit cheaper :) 

Sorry about taking ages to reply, i'm using an ancient netbook :( 

Thanks again mate! :D 
a b ) Power supply
December 28, 2010 11:51:27 PM

antec basiq series 550w.
if you can get that...
its cheap and decent enough

the 550w recommendatin for a 3870 is ridiculious, my friend's said on the box 300w iirc, but anyway that recommendation is for the entire system, not just the gpu.
December 29, 2010 2:50:46 AM

If the price is right, I would always recommend 3 things when it comes to psu's. First I personally prefer 80+ certified, modular, and then higher voltage, in that order. Even if you do not need the "extra" volts now, if you change parts, you do not have to worry about buying another psu when you still have a perfectly good one. Also the 550w recommendation is meaning for the pc as a whole. Basically the gpu companies want to give you a number that they feel that if your pc had that power supply already in it, the card would have no problem running. It is not 550w for the card alone.
a b ) Power supply
December 29, 2010 3:48:52 AM

voltage? surely you mean wattage?
!