Which PSU calculator do you use?

[z1ggy]

Checking to see if my upgrades will get enough power from my current 550w PSU. I'm using multiple different websites to see if there are any discrepancies... And of course there are.

Upgrades will be going to a 3570k with a possible OC to 4-4.2Ghz, 4 sticks of DDR3 (total), 1 HD and 1 SSD, and either a R9 270x or a gtx 760, and a few fans.

Newegg said I'd need as much as 800w (wtf???) and most other places ranged from 400-480w.

I'm assuming my 550w will be okay, but under full load (intense gaming) I'd like to keep the stress on the power electronics as low as I can. However, I don't want to shell out more money if I don't need to.

Thanks for reading.

 

[TemjinGold]

You'll be fine.

 

[lehtv]

550W is more than enough for a Haswell CPU and a 150W GPU. You'll probably be at about 50% load while gaming, using the GTX 760.

 

[Bubbleawsome]

I have my lynnfield 870 and GTX 770 at 1332 (hits 100% TDP) on my (regarded as class 2) Rosewill HIVE 550w and it has never had a problem. I plan to get a 4670k and I doubt it will give me trouble. I used to use extreme PSU calculator but I've become pretty good at doing it in my head. 450w would be good, so the 550w is really good.

 

[jds1991]

I agree with everyone

 

[dave_the_nerd]

I usually use Excel. It's good at adding things up.

I double-check manufacturer power draw numbers against observed numbers from reviews. (Most review sites do power draw testing now.)

 

[z1ggy]

Thanks everyone!

 

[Blain]

Which PSU calculator do you use?

I have never used a calculator to determine what wattage PS to buy.

 

[schmuckley]

http://extreme.outervision.com/psucalculatorlite.jsp

 

[alexruiz]

http://extreme.outervision.com/psucalculatorlite.jsp

Spring the $2.99 for the lifetime pro subscription, it will give you the real important number you want: The consumption in the 12V rail. That way you can size the PSU properly, and you will be surprised at how little PSU you need for that setup

 

[TeknoBug]

http://www.extreme.outervision.com/psucalculatorlite.jsp

A tad outdated on component listing but gives a general idea.

 

[ericloewe]

Most so-called calculators grossly overestimate power consumption...

 

[thedosbox]

None of them. They're in the business of encouraging you to buy more PSU than needed. The outervision one even has a thermaltake and enermax branded version.