How much power do i need

[Illumotion]

Hi, im going to build a new system. it's my first system, i don't knew how much watt i need in my power supply. i got one old 450w powersupply lying around but i don't thing it will be enought.

Specs:

Cpu: i5 3570k @4.2 GHz

MOBO: Asrock extreme 4

Gpu: amd radeon 7970

and a ssd and a 500 gb harddrive

[LT403F]

Something like a 500-560W PSU would probably be enough. 600W to be on the safe side and more upgrade proof.

[firewist]

500-600 watt will be more than enough.

[simtransporter]

I would say 650W as a minimum for your build considering you are overclocking, although its good to go with something a bit higher that allows you to upgrade or expand in the future. Remember power supplies are a good investment, a good power supply could last you several builds. My advice would be to go with something decent, don't cheap out on it.

[killerx525]

Not sure what your budget is but a solid 600-650W power supply like the Seasonic X-660 would be a fine choice.

[andi1455]

check out this, it gives you some idea what psu you need

http://www.bequiet.com/en/psucalculator/expert

[Rob]

You could run it on a good quality 430W to be honest :) Corsair CX 430 would do the trick!

[bartekxx12]

You could run it on a good quality 430W to be honest :) Corsair CX 430 would do the trick!

I agree with Rob, even 400-450W would do as long as it's a good power supply from a good brand. The one you have lying around might work depending on what brand/model it is.

[Umeshwarnath]

any quality psu over 400w like a corsair cx430 or 500 will do just fine . get the 500 ,it will give a little head room for your future need like small upgrades!

[mralexkohl1993]

i would do a 650 watt for overclocking headroom. You didnt tell us how many fans or if your getting any new hard drives. there are many variables but i would get a 650 watt.

[Emkryan]

nowadays any single gpu config can do just fine on 400-450w easy, you can either get a decent 700w for upgrade room or a platinum 550-500w psu depending on what you plan with the future what with Xfire or sli and whatnot. I would suggest low-wattage platinum psu's just for the peace of mind you get with high quality parts and high efficiency

[cheti]

Yeah I would go with a 600-650W quality PSU for some overclocking headroom or if you know youre planning on Crossfire in the future, then get a 750-800W.

And remember, you do not wanna gimp out on PSU's when building a new PC. Theyre the most important part since they can take your whole system with them if they die or have a poor quality

Best wishes

- cheti

[ThemightPK]

Hi, as most other people have said around the 600w mark and you'll be set. I'm running a build similar to yours and have a 650w, it's nice to have the head room for possible future upgrades. Some posts state you can get away with a decent 450w psu, that is true but you may be limiting yourself a few years down the line, if for example you wanted to add a second card. Regardless of what watt you finally go for, make sure the brand is quality and you should have no problems at all.

[Vanderburg]

I've found this to be fairly accurate, too: http://www.extreme.outervision.com/psucalculatorlite.jsp

[LimeDk]

Get a good 650Watts power supply. Antec, Corsair, Thermaltake. and you got all the power you need.

[BathroomSecurity]

500-600w of power will be enough. Remember to go at least 80+ bronze certified. You should consider getting a power supply with more wattage for future upgrading capabilities.

[drfreeeeeman]

430 would be enough, but to be honest, pick one with 500-550 watts then you have plenty of room for upgrades or raid arrays

[ForumSage]

Go to google and type in how much power do I need and it will calculate the exact amount

[Art Vandelay]

500-600w of power will be enough. Remember to go at least 80+ bronze certified. You should consider getting a power supply with more wattage for future upgrading capabilities.

Those certifications don't mean very much about a power supply; in practice, many units that are certified don't actually reach those levels of performance.

Just go for a power supply that was well rated by Johnnyguru or another reputably reviewer who has actually tested the unit.

I'd go for a 500 watt one at least to be on the safe side.

[iarejesus]

i would go with a high quality 500W