Power Supply Unit choice

theProbe · Jun 28, 2013

Hello TH comunity.
The PSU will be powering:
MSI G45 z87 gaming
Intel I5 4670k (overclocked)
And possibly oc'd ram.
GTX 760 MSI (1x8 pin; 1x6 pin) possibly in 2 way sli in the future (not 100%)
~5 fans 1 ssd and 1 hdd.

The problem is that, where i live, the PSU's are pricey and choices are very limited.
Majority of PSU's on sale are CM, LC power and Chieftec

So i can either get a Cooler Master GX 650w for 103$, Cooler Master Silent Pro M2 620W for 120$ or a Seasonic s12ii 620w for about 118$ but which i would travel 200km for.
Im really struggling since the GX received very bad review's, and the other two are slightly out of my budget but i could manage if they are worth it.

Some other options are a variety of LC PSU's, cheftec, cm b series, thunder.

Help me Please!

luckiest charm · Jun 28, 2013

Go for this one -

http://pcpartpicker.com/part/cooler-master-power-supply-rs600pcare3us

I myself use it since last 1.5 years and it is as smooth as new.

Cooler Master eXtreme 600W PSU should be enough for your needs.

theProbe · Jun 28, 2013

Don't have that one neither

luckiest charm · Jun 28, 2013

Are Corsair PSU's available there?
Otherwise Seasonic ones are looking the best to me.

avenseth12 · Jun 28, 2013

Go with your 2nd choice. The CM 620 is a good PSU. It is semi-modular the main cables are fixed. It has single rail 12v with 50a which is plenty of power for your build.

ko888 · Jun 28, 2013

The Cooler Master eXtreme 600W can't even deliver 80% of the capacity specified on its label without going out of spec because of horrible voltage regulation.

For a system using a single GeForce GTX 760 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors. The MSI GTX 760 TwinFrozr Gaming requires one 6-pin and one 8-pin PCI Express supplementary power connectors.

For a system using two GeForce GTX 760 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 50 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors. For two MSI GTX 760 TwinFrozr Gaming cards you will need at least two 6-pin and two 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most important factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

If you plan on using Haswell's low power states you may want to get a power supply that is able to handle that without having to perform some workaround.

The Cooler Master Silent Pro M2 620W is the only one you've listed that has been verified as being Haswell compatible.

The Cooler Master models that you should stay away from are most of the ones that use Seventeam as its OEM (there are also other models that should be avoided).

The GX Series 650W (RS-650-ACAA-E3) is made by Seventeam and is now discontinued but there may be some vendors still selling them.

The GX Series 650W (RS-650-ACAA-D3) is its replacement and is made by Enhance Electronics. This is an attempt by Cooler Master to try to improve their product performance and reliability.

theProbe · Jun 28, 2013

I am also leaning forward to silent pro m2 620w. I don't know where avenseth found the information of 50a on 12v rail but if its true, 2 way sli with 760 will be possible?
I wont be doing any extreme overclocking. I want my pc to last many many years so probably only to about 4-4.4 ghz.
So, does the silent pro m2 620w get a green light? 5 year warranty is also nice.

ko888 · Jun 28, 2013

theProbe :

In theory the Cooler Master Silent Pro M2 620W should be able to handle two GeForce GTX 760 graphics cards in 2-way SLI mode.

You can see the specifications (i.e. Amps on each output rail) for the Silent Pro M2 620W here:

http://www.coolermaster.co.uk/product.php?category_id=3667&product_id=6799

theProbe · Jun 28, 2013

Oh, i was always getting the international site with google which has fewer details. Thanks for the link.
Another question. Model of this psu on the cm site is "Model: RS-620-SPM2" and yet in the site of the store i would buy from is
"model: RS620 SPM2E3 EU". Is it different or am i just being paranoid?

ko888 · Jun 28, 2013

theProbe :

RS620 SPM2E3 EU

E3 - this is the designation for the OEM. In this instance it's Seventeam.

EU - this is the region designation. In this instance it's the European Union.

theProbe · Jun 28, 2013

Damn... Should i not purchase it because of seventeam being the oem?

ko888 · Jun 28, 2013

theProbe :

The Silent Pro M2 is one of the series where it seems that they haven't royally screwed up.

In my previous post I said most of the Seventeam models not all.

Does the store that you buy from have the Cooler Master V Series?

theProbe · Jun 28, 2013

theProbe · Jun 29, 2013

I will probably be buying a new PSU next week but today i got the new MSI g45 z87, 4670k and 2x4gb ram(vengeance pro). i put this all in my new FD core 3000 and use my old PSU blueberry 560w that has a 4pin and 16A on 12v. and my old HDD with a windows 7 32bit on it.
My quiestion is should i even be turning on the PC with this PSU since it has only a 4 pin (i need 8 pin) and only 16A?

ko888 · Jun 29, 2013

theProbe :

The i5-4670K has a TDP of 84 Watts. A single 4-pin CPU power connector should be sufficient if you're not overclocking the CPU for now. Usually the requirement for an 8-pin CPU power connector is when your CPU's TDP is 96 Watts or greater and also if you're going to be overclocking your CPU.

theProbe · Jun 29, 2013

So is it safe to play dota 2 and some surfing and music listening some time before i get a new psu?

ko888 · Jun 29, 2013

theProbe :

What are you using as the GPU? Integrated Intel HD Graphics 4600 on the i5-4670K or a discrete graphics card? If it's a discrete graphics card what is its brand and model number?

theProbe · Jun 29, 2013

I won't be using a GPU before i get a new PSU for safety. So yes, im using integrated intel graphics.

ko888 · Jun 29, 2013

theProbe :

Then you should be fine.

theProbe · Jul 1, 2013

Its final. I will go with either Cooler Master Silent Pro M2 620w or Seasonic S12II 620w .
CM wins for modular and 2 more amps on 12v and larger fan (less noise?). Seasonic wins for slightly better efficiency and brand.

If you were in my shoes, which would you buy? They cost, near as makes no difference, the same.

ko888 · Jul 1, 2013

I like modular output cabling.

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