Help with choosing PSU

Mr-Shark · Sep 19, 2014

Hi guys,

I'm not sure how strong my PSU needs to be for my PC I'm building:
-i5 4690k (i'll OC it)
-dark rock pro 3
-16gb g.skill ares 1866
-Samsung EVO 840 120 gb
-Seagate 1TB HDD
-gtx 970
-phanteks enthoo luxe
-for MB I'm not sure, Asrock z97 (killer?)

In the future I may add another HDD, but that's only maybe.

Traciatim · Sep 19, 2014

If you aren't planning on going SLI at any point in the future than any 500-550 watt supply that is good quality (Like Say a Seasonic, Corsair, XFX, Antec) will run a machine like that with no problems. Your machine will probably need in the 300-350 watt range and you want a little head room so even at 350 watts if you didn't want to go over 75% of your capacity the PSU only has to deliver 466.

Lots of people recommend the XFX 550 watt supply because they don't cost a huge amount and a solidly built.

rk_ftw · Sep 19, 2014

A good quality 550W PSU will do. If you're going to SLI in the future get a 750 one just to be on the safe side.

Mr-Shark · Sep 19, 2014

In my old Pc I have Corsair CX 500, will that do or should I go for a little stronger 600W?
I'm not planing on SLI, I prefer single strong GPU.

Traciatim · Sep 19, 2014

The CX500 should run fine if it's got a sticker on it like on this page: http://www.corsair.com/en-ca/cx500-80-plus-bronze-certified-power-supply . . . 12v line rated at 38 Amps, or 456 watts. That would put you at using 65-75% of your rated capacity. I'm pretty sure the CX500 had some other models where the 12V line was only rated at slightly over 400 watts, in which case it would run but it would be pushing the unit pretty hard in that case and I would recommend replacing it just for the added headroom. Just check the sticker on the side.

rk_ftw · Sep 20, 2014

The CX500 is a Tier 3 PSU. Get a PSU from Tier 1, 2A or 2B http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html

The XFX TS 550W / Seasonic S12ii 620W are both quality PSUs. Get the one which is cheaper in your country.

Edit : Just be sure to disable C6/C7 states in your BIOS to be on the safe side as these PSUs are not Haswell ready.

Mr-Shark · Sep 20, 2014

C6/C7 states? Can you pls explain, didn't know PSU are optimized for particular CPU.

rk_ftw · Sep 20, 2014

Mr-Shark :

Just check out these links.

http://www.tomshardware.com/answers/id-1720613/haswell-compatible-psu-haswell-states.html

http://www.tomshardware.com/answers/id-2049815/seasonic-620w-m12ii-support-haswel.html

Mr-Shark · Sep 20, 2014

Traciatim :

My PSU has different sticker on it, so I guess it isn't powerful enough?

@rk_ftw XFX TS 550W has lower price in my country compared to other PSU on tier 2 A list, so I think I'll go with that one.

EDIT: Should I go for the Bronze or Gold certified?
BTW thank you for explaining me what C6/C7 is

rk_ftw · Sep 21, 2014

You're welcome. Bronze or Gold.... Go for the Gold if it's a difference of 10-12$.

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Help with choosing PSU

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