Print Page - How Much Power Do I Need??

Title: How Much Power Do I Need??
Post by: Gone_Away on September 15, 2015, 10:05:45 PM

Hi Folks,

Looking at a new case and PSU and it dawned on me that I have no idea how much power I need..

Is 1000w too much? Is 850w too little??

Title: How Much Power Do I Need??
Post by: Tutonic on September 15, 2015, 10:13:14 PM

Depends entirely on what's going in that case :)

I run mine on a good quality 600W which is enough for most builds. You generally only need to go right up to the 850-1000 mark if you have more than one GPU, but the key is to get one with a good efficiency rating.

Title: How Much Power Do I Need??
Post by: Chaosphere on September 15, 2015, 10:22:44 PM

Modern GPUs use less power than their older counterparts.

Tut hit the nail on the head.

1 GPU, get a good 600W or so.
2 GPUs, bump it up to 800W.
3 GPUs, you have too much money and should consider giving me a hangout in addition to a getting a 1,000W PSU for your shiny PC.
4 GPUs, I don't want to talk to you anymore.

EDIT - and for reference, I own this -
http://www.amazon.co.uk/Corsair-CP-9020055-UK-Series-Modular-Supply/dp/B00FG9FTDI
and have ran 2x 980 TIs on it with no issues (nah, I don't own them :( )

Title: How Much Power Do I Need??
Post by: BrotherTobious on September 15, 2015, 10:29:33 PM

I am using a 750 on a 980gtx with no issues

Sent from my Nexus 5

Title: How Much Power Do I Need??
Post by: Gone_Away on September 16, 2015, 10:32:55 AM

Looking at a new case with psu at the bottom. Any issues with cable length?

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Title: How Much Power Do I Need??
Post by: Tutonic on September 16, 2015, 10:49:52 AM

Quote from: Ninja_Freak;403822Looking at a new case with psu at the bottom. Any issues with cable length?

Sent from my iPhone using Tapatalk

Probably not. Having the PSU at the base of the case has been the standard design for a while now, so PSU cables are usually designed with this in mind. Unless your case is an absolute monster *glances at TeaLeaf* it shouldn't be a problem.

It's worth spending the extra pounds to get a modular PSU - makes it much easier to manage the cabling inside the case.

Title: How Much Power Do I Need??
Post by: Gorion on September 16, 2015, 10:55:38 AM

I use this one (http://powersupplycalculator.net/) for my builds.

Never had any issues when I started using it. I would still go a little bit higher than what it told me.

Cable length problems will depend on the case you choose. Which one are you getting?

Title: How Much Power Do I Need??
Post by: Gone_Away on September 16, 2015, 11:45:57 AM

Not entirely sure. Would like to go full tower but most likely settle for mid.

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Title: How Much Power Do I Need??
Post by: BrotherTobious on September 16, 2015, 11:48:01 AM

The corsair 760 is modular and fits very nicely in a matx case

Sent from my Nexus 5

Title: How Much Power Do I Need??
Post by: Gorion on September 16, 2015, 12:23:05 PM

You have to consider cable routing as well.

If you will be hiding cables underneath the mobo tray, then you will be using more cable length. I didn't have issues with an AX1000i in a Cosmos2 case, however them 5" bays are at the absolute limit.

Title: How Much Power Do I Need??
Post by: Tutonic on September 16, 2015, 12:27:25 PM

You may want to give http://uk.pcpartpicker.com/ a browse. Select the case(s) you're interested in, and check out some of the completed builds people have done with them.

That should give you a good idea on what PSUs have been used successfully.

Dead Men Walking

dMw Chit Chat => The Beer Bar => Technology Section => Topic started by: Gone_Away on September 15, 2015, 10:05:45 PM