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What psu do i need for my system?

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September 26, 2012 11:02:02 PM

what psu do i need for my system?

cpu - AMD Phenom II X4 965 Black Edition - £87
graphic card - GTX550Ti 1GB - £90
motherboard - Asus M5A78L/USB3 - £58
ram - G.Skill 8gb DDR3 1600Mhz RipjawsX Memory - £34
case - cit vantage - £32



i used a psu wattage calculator and it saids i need 701w but that sounds a bit too much for my build. please help.

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September 27, 2012 1:52:19 AM

okay thanks, will 600w be enough?
September 27, 2012 1:53:37 AM

cuz, i did that psu power count thing and it said it recommends an 701w
a b ) Power supply
September 27, 2012 2:00:53 AM

Your system should barely touch 300W so even a quality 400W PSU would do the job. The reason why everyone is inflating recommendations to 2-3X actual power requirements is because over-rated PSUs are too common and almost nobody believes even quality PSUs will hold up to their claims for the whole warranty period.

A little sad but that is how things are.
a c 76 ) Power supply
September 27, 2012 2:07:15 AM

adamyjake said:
cuz, i did that psu power count thing and it said it recommends an 701w


How? Even a max OC on both the CPU and GPU couldn't possibly pull 701W...

Yes, the 965 uses a fair amount of wattage when OC'd, but a 550 Ti barely uses any power.

Nvidia only recommends a 400W PSU for a stock 550 ti and it maxes out at 116W. Even with an absolute max OC, I don't think it would pull more than 150W.

A good 500W PSU would be plenty. If you still doubt, go for a 600W unit, but that's WAY overkill.
September 27, 2012 2:07:36 AM

InvalidError said:
Your system should barely touch 300W so even a quality 400W PSU would do the job. The reason why everyone is inflating recommendations to 2-3X actual power requirements is because over-rated PSUs are too common and almost nobody believes even quality PSUs will hold up to their claims for the whole warranty period.

A little sad but that is how things are.


okay thanks, im going to go with a 500w just in case i want to add an extra graphic card or more hdd.
a c 76 ) Power supply
September 27, 2012 2:18:28 AM

Eh, we're picking nits here, but I'd still take the XFX unit over either of those.
a c 76 ) Power supply
September 27, 2012 2:23:28 AM

adamyjake said:
will this one be alright? its coolermaster and there meant to be very good products ?
http://www.coolermaster.co.uk/product.php?product_id=66...


Nope.

Go with the Antec, OCZ or XFX. All three are good. Most Cooler Master PSU's are marginal, at best (there are a couple of decent ones, but overall you should stay away from them).
a b ) Power supply
September 27, 2012 12:13:18 PM

adamyjake said:
okay thanks, im going to go with a 500w just in case i want to add an extra graphic card or more hdd.


Mind that a 500W PSU is for a single graphic card configuration.

If you want to upgrade it to 2 graphic cards in the future you will need at least a 750W PSU.
a b ) Power supply
September 27, 2012 1:30:14 PM

If you want 2 graphic cards get one of these power supplies:

Corsair Enthusiast TX V2 CMPSU-750TXV2UK 750W Power Supply http://www.scan.co.uk/products/750w-corsair-enthusiast-...

or

Corsair Enthusiast TX V2 CMPSU-850TXV2UK 850W Power Supply http://www.scan.co.uk/products/850w-corsair-enthusiast-...

Now for a single graphic card config get Corsair Builder Series CMPSU-500CXV2UK 500W Power Supply http://www.scan.co.uk/products/500w-corsair-builder-ser...
September 27, 2012 3:21:00 PM

Well i just did the thermaltake calculator for you factoring in some guesswork and it comes out at 410w so a decent 500-600w PSU will do fine! Pick the same one that toms uses in its 1000$ pc build.
a c 83 ) Power supply
September 27, 2012 3:38:58 PM

Why are people saying 750W for SLI? He has (or is getting) the GTX550TI. It only needs ONE PCIe plug. You don't need four of them, only two. The 550W units already posted can do this.

XFX is fine. Most of their PSUs either are or were made by Seasonic. I think I read many of their current ones are built by CWT. Don't run and hide your head in the sand, CWT made the excellent 750W corsair many people probably still use. You don't need a 600W unit for the build we are talking about, and you don't need a 750W+ unit for SLIing the 550TI.

I put this one up for consideration. 80+Bronze, plenty of power and plugs. Only 55pounds.

http://www.ebuyer.com/245671-antec-520w-high-current-ga...
a b ) Power supply
September 27, 2012 5:03:35 PM

adamyjake said:
okay thanks, im going to go with a 500w just in case i want to add an extra graphic card or more hdd.


I recommeded a 750W PSU, because the above quote from the OP.
a c 76 ) Power supply
September 27, 2012 5:49:55 PM

Quote:
I would not go with OCZ or XFX power supplies. They are not good, at least from what I have read about in forums.


Both the XFX and OCZ units listed here have fine reviews, FYI.

And who told you/where did you read that XFX was bad? OCZ, yes, sometimes, but XFX is one of the best. http://www.eggxpert.com/forums/thread/323050.aspx
a c 83 ) Power supply
September 27, 2012 6:37:21 PM

A 125W CPU and two 120W GPUs mean you need a 750W PSU? 125 + 240 + 50 for system is 415W by my math. And you want him to buy a PSU that is 300W+ more? No need to spend that much.
a b ) Power supply
September 27, 2012 7:39:07 PM

4745454b said:
A 125W CPU and two 120W GPUs mean you need a 750W PSU? 125 + 240 + 50 for system is 415W by my math. And you want him to buy a PSU that is 300W+ more? No need to spend that much.


415W is not enough for 2 graphic cards.

People here seems not read things before post -- the OP mentioned on the other post he/she wanted 2 graphic cards in the future, in this case, and only in this case, 750W is necessary. I did recommended a 500W PSU for one card, and I provided the OP with a link.
a c 243 ) Power supply
September 28, 2012 12:04:36 AM

jemm said:
415W is not enough for 2 graphic cards.

People here seems not read things before post

OP has a GTX550Ti, they're rated at 116 watts
http://www.tweaktown.com/reviews/3936/palit_geforce_gtx...
As was stated any 550 watt psu that was mentioned would be fine, you just have to realize that pushing a psu to 70% capacity won't hurt it if you're not doing it 24/7
a b ) Power supply
September 28, 2012 12:38:02 AM

People in this thread just refuse to read the posts, and all together start to bashing me for nothing!

After the first post recommending a 500W PSU, I was the second one, and I just recommended a 600W PSU, because both 500W and 600W were the same brand, but the 600W was cheaper! READ IT!

adamyjake said:
i want to add an extra graphic card or more hdd.



Then the OP manifested his willing to get an extra graphic card, and then I say that for 2 cards the OP may need a 750W PSU -- is it wrong or what?



a c 76 ) Power supply
September 28, 2012 12:52:55 AM

jemm said:
is it wrong or what?


For two 550 Ti's, it is.

Now, you're assuming that he's talking about using multiple power hungry cards, and he never said that. It makes more sense to assume that he would add another 550 Ti (not what I would do, but still), in which case, 550W is just fine.

If he speaks up and says "oh yeah, I want to SLI with two GTX 680's", then sure, 750W makes sense.
!