How to Pick the Right Power Supply

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jado

i have two power supply , and i've nvidia which slow down my pc, can i parallel my two psu with 12V=12V, 5V=5V, 3.3V=3.3V . plz sugest me

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nesrinamb

I always get customers to my repair shop asking whats wrong with the computer since they had already replaced the PSU months before. Then they tell me it cost them $15 and I have to tell them they will need a new one. PSU due tend to be one of the few components that you get what you pay for.

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EthicSlave

always rig my old PSU's to car audio amps to speakers using the simple paperclip trick/(well shielded wire)

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bling581

It's not always the case, but usually the higher the price the better the components. However I don't think there's a "cheap, good" PSU. You can get cheaper ones but a PSU is something you don't want to skimp on because a bad one can affect the performance of your entire system and even damage other components. If you're buying it from a brick and mortar store it helps to pick them up because the cheaper ones will sometimes be lighter (this works if there's not a ton of packaging). My first PSU I bought was from PC Power & Cooling. It lasted for the life of two different systems with no issues for a total life of 8-9 years.

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dgrmouse

The bit about getting what you pay for is poorly written.  Either the statement is a colloquially written idiom or it is just flatly wrong. There are, as a matter of fact, plenty of overpriced power supplies. There always have been. There are also plenty of opportunities to catch quality devices on sale. While the most extreme bargains may set off warning flags, using retail price as a measure of power-supply quality (although it certainly remains an important value metric) is not a sound practice.

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ceator3571

This is the kind of stuff I enjoy reading! Thanks!

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Cooketh

I find that Amperage is the hardest thing to balance when shopping for power supplies, especially if your doing Multi-GPU and double especially if the PSU is dual or quad 12V rails.

It's actually difficult to get the rated amperage for the rails from most of the PSU manufacturers and I've almost never seen it posted on spec sheets.

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voltagenic

I really appreciate this article, there are many new system builders that are totally ignorant to PSU's and hopefuly this'll help them become more knowledgable and help them make a good decision before thet waste money.  There aren't too many guides like this online, just lots and lots of thread on numerous forums. 

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Dartht33bagger

Just get anything Corsair.  Can't go wrong with that brand.

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yu119995

I'm in complete agreement.  Although recently I've tried Seasonic out for some of my builds based on reputation and if I'm not mistaken Seasonic either used to or still does make Corsair power supplies.  They're wonderful also.

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szore

I dropped a Corsair 750W PS in my rig 2 years ago and never looked back. I have the H90 on my 2700 SB, same deal, works perfect.

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Danthrax66

While generally correct, I'd rather get anything from Sea Sonic.

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warptek2010

I second that.

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JoetheMobster

I third that!

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BrandNewJesus

Also you may want to mention the type of PSU. ATX or whatever. I puchased an OZC modular PSU a few months ago only to find that it could not be mounted with the fan facing down, and that the cables were really short. Comments on Newegg complained of the same thing, with the response from OZC being that the PSU type is not meant for our motherboard or case. Something I have never heard or thought about before buying. (PSUs a PSU, unless its antec...so I thought.)

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Danthrax66

How to pick the right power supply:

Go here http://www.jonnyguru.com/modules.php?name=NDReviews&op=Review_Cat&recatnum=13 or here http://www.hardocp.com/reviews/psu_power_supplies/ Buy a power supply they recommend within your budget. If they don't review it or recommend it don't buy it. It is that simple.

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Gezzer

A big vote from me on Jonnyguru.

The guy really really knows his stuff and is the only tester that completely tests out a PSU.His humor can be hit or miss but he's the only one I trust with PSU recomendations.

How I came across him was I had a OCZ 850 in my main gamming system. Well I had upgraded my video card and it only lasted a year, of course just out of warranty too. I was really surprised it had happened and a buddy said it might of been my PSU even though it had a lot of head room. Googled it and ended up at Jonnyguru's site. He was the only one that showed my great PSU had a major ripple problem past a certain point. Everyone else said it was a great PSU with very little voltage fluctuation. Would of reused it and killed at least another card if I hadn't read Jonny's review.

Now I'm running a Corsair AX 1200. It's over kill but it's also one of the best unit's he's ever reviewed and I know I'm going to have it for a long time so if I decide to go with an extreme system I'm covered.

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Danthrax66

Hard OCP uses the same tester as Jonnny only slightly modified, and they also test at higher temps. (they actually might use a newer/better tester if I remember correctly)

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daveok

Loved the article Loyd! I never knew that insufficient current delivery at startup would cause the PC to freeze or not startup - I wish I knew that in the past. Also, thanks for showing how a bigger PSU can increase efficiency as the larger PSU will be running at a comfortable level, unlike the smaller PSU that is running at level. Less noise and heat = a happer system and me.

 

Thanks again Loyd!

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reutnes

Don't forget to buy a tester along with your new power supply.  Godo for diagnosing issues, and will help you make a case if you need to RMA it.

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Supall

I intend to buy a SeaSonic X650 and place that in a P280.  I'm pretty sure the PSU will fit, but I wonder if it will be snug enough to eliminate any vibration that might occur.  Would you guys know?

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AETAaAS

I haven't come across any PSU that causes significant vibration in my experiences building PCs. Just make sure you tighten the screws properly but if somehow you do encoutner rattle, you can usually get rid of it by using some rubber washers in your screws.

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