Should I buy a new PSU?

Avalanchefighter · Feb 26, 2014

Hi!

I am currently upgrading my computer, but I'm having trouble determining whether or not I should also buy a new PSU.

So my future specs are going to be:
a rotating hard drive (don't remember which)
Samsung 840 EVO 120GB
MSI Z87-G45 Gaming
i5-4670k
MSI Radeon R9 280X GAMING 3G
4x 4 gb DDR3
cooler master 690 II plus
2 fans

I currently have the following PSU: Seasonic S12II-Bronze 520W.

Should I upgrade my PSU or not? I have read conflicting sources. If I have to upgrade, is the Seasonic M12II 620W a "good enough" upgrade?

Ahmadjon · Feb 26, 2014

Your PSU is good for your system!
But get 620W to be on safe and later upgrades!

enemy1g · Feb 26, 2014

From just a general glance around the internet. The r9 280x should only require anywhere from 21-33A on a 12V rail. Your current PSU supplies 40A, so you should be fine.

toyftw · Feb 26, 2014

Avalanchefighter :

Hi - A lot of people suggest more power than you need. Enemy1 is correct, your system needs at
least 30 +12v amps and your PSU has 40 +12v amps. No need to upgrade.

ko888 · Feb 26, 2014

The S12II Bronze Series and the 520W and 620W models in the M12II Bronze Series are not Haswell compatible PSUs.

Avalanchefighter · Feb 27, 2014

So after reading about Haswell compatible PSUs, I figure I need to buy a compatible PSU right?

rayzz94 · Feb 27, 2014

no you don't need haswell compatible psu. It's only required for c6/c7 state which will lower your idle consumption of CPU. Here's the test http://www.legitreviews.com/what-enabling-c6c7-low-power-states-do-on-the-core-i7-4770k-haswell-cpu_2217

ko888 · Feb 27, 2014

rayzz94 :

You're citing an article from 8 months ago.

My friend bought a Z87 chipset motherboard along with an i7-4770K back in October and the C6/C7 power state option in the BIOS was not disabled by default as stated in the article that you linked to.

If a potential problem can be avoided during an upgrade or at the time of planning a new build then that is what should be done.

ko888 · Feb 27, 2014

Avalanchefighter :

Haswell compatible PSUs are easy to find since any reputable PSU manufacturer that puts out a new PSU these days makes sure that it is compatible.

If you're overclocking the CPU, and it requires a bump up in voltage to do so, then you will need a new PSU.

If the CPU and GPU are only going to be run at their stock factory clocks then you don't need to upgrade the PSU but you should disable the C6/C7 low power states in the BIOS to prevent any potential problems with the system being unable to wake up from those power states.

rayzz94 · Feb 28, 2014

ko888 :

i just want to show him what is the feature of haswell compatible PSU and how big will be difference

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Should I buy a new PSU?

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