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Will i need to buy a new PSU?

post #1 of 12
9/19/12 at 7:47am
Thread Starter 
Hello,

I am going to buy a new GPU, the sapphire radeon HD 7850, but im not sure if my current PSU will be able to handle it... ive always had a sapphire radeon HD 5770 so far and it has always worked fine. this is what the label of my current psu (its a A-open one) says:

model no: Z450-08APAF (450W peak)
AC input: 220-240V~, 5A, 50Hz
Max DC output: (+3.3V & +5V = 180W MAX, +12V1&12V2 = 348W MAX) 400W
DC output: +3.3V --28.0A (org), +5V -- 30.0A (red), +12V1 -- 18.0A (yel), +12V2 -- 18A (yel/black), +5Vsb -- 2.5A (purp), -12V -- 0.5A (blu)

I know people say that you need atleast a 500W psu for a 7850 but then i hear other people say its not necesarily needed if you have a quality psu, so will i have to buy a new one..? and if yes do you have any recommandations?

other specs:

Intel core i5 750 @ 2.67 Ghz
8gb RAM ddr3 (4x4)
128 GB SSD ( OCZ Agility 3)
1 other 1TB HDD
Windows 7 64-bit

Thx alot!thumb.gif
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post #2 of 12
9/19/12 at 8:10am
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AMD recommends a minimum of a 500W power supply to power a system that has one 7850 in it, and the PSU you have right now is basically a generic 450W unit (not good).  So, I think  it should be replaced ASAP.

 

http://www.amd.com/us/products/desktop/graphics/7000/7850/Pages/radeon-7850.aspx#2

 

Are there any online stores you can order a new PSU from?

 

What would be your budget?

It's like advanced alien technology! :)
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It's like advanced alien technology! :)
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post #3 of 12
9/19/12 at 8:15am
Honestly, I couldnt find any real information about it, it looks to be a pretty low end unit. Not to mention, according to what you have written it can only support 348W on the +12v rails (which is the figure that matters). If you werent pushing it before updgrading GPU might put it over. A new PSU might be a good precaution to take.

You can get this antec EA-650 for 45 after the rebate and 10 off promo code.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371044&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=

Should be plenty for your setup.
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post #4 of 12
9/19/12 at 9:03am
Thread Starter 
thx for the quick reply!

would this be sufficient? a corsair CX500 V2

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027&Tpk=corsair%20cx500

that would be great cause i can get that from a store nearby
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post #5 of 12
9/19/12 at 9:07am
i wouldnt get that because its not 80+ bronze. you are much better with the antec one linked above.
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post #6 of 12
9/19/12 at 9:12am
Quote:
Originally Posted by Pavilion 650m View Post

i wouldnt get that because its not 80+ bronze. you are much better with the antec one linked above.

Plus the antec if 5 dollars cheaper and 150W more...
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post #7 of 12
9/19/12 at 9:12am
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Quote:
Originally Posted by Coffey View Post

thx for the quick reply!
would this be sufficient? a corsair CX500 V2
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027&Tpk=corsair%20cx500
that would be great cause i can get that from a store nearby

 

It would be ok, but you'd be getting ripped off because of the Rosewill Capstones.  They are much better PSUs and you can get the non-modular 450W Capstone for the same price.  Not only that, but the 450W Capstone has a +12V capacity of 444W while the CX500 V2 only has a +12V capacity of 408W.

 

The modular 450W Capstone has the same capacity as its non-modular counterpart, and it's only $10 more ($70).

 

So I'm just saying that the Capstones give you much more for your money, plus they are high-end units whereas the CX500 V2 is more of a budget unit:

 

http://www.overclock.net/t/654983/on-corsair-psus/0_100

 

It's entirely up to you what you want to get for $60, but if it were my money then I'd get the 450W Capstone.

It's like advanced alien technology! :)
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post #8 of 12
9/19/12 at 9:12am
Quote:
Originally Posted by Marioshi View Post

Plus the antec if 5 dollars cheaper and 150W more... free shipping!

What price is it at the store? Do they have a webpage?
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post #9 of 12
9/19/12 at 10:12am
OP 348w on the +12v rails is not bad. Your PSU should have no problem handling a HD 7850. HD 7850 is quite power efficient. here is power consumption with a core i5 750

http://techreport.com/review/22705/xfx-radeon-hd-7850-and-7870-black-edition-graphics-cards/7

the entire PC draws 200w.

http://www.techpowerup.com/reviews/Powercolor/HD_7850_PCS_Plus/26.html

HD 7850 draws around 110w .
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post #10 of 12
9/19/12 at 10:26am
7850 draw slightly more power than 5770.

http://www.anandtech.com/bench/Product/549?vs=538

Metro2033
289 Watts Vs. 258 Watts for HD5770 on the same system.

OCCT
218 Watts Vs. 206 Watts for HD5770.

I guess your PSU might be enough for the card if it handled the 5770.
Just don't do any kind of high overclocking with that PSU and you will be OK.
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