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Looking for a worthy, fully modular, successor of my HX850 - Page 3  

post #21 of 43
Quote:
Originally Posted by prava View Post

Whether the psu's fan spins at load is meaningless. Simply put: by that time the rest of the computer will be far noisier unless you go watercooling. If you do, then, we are talking about something very very different.

For instance, I have an EVGA G2 750W, powering a 2600K @ 4.4ghz + 290X Tri-X. Even when I'm playing Dota 2 the psu doesn't spin... and although it does spin on some other games, the rest of the computer fans make it so that I do not hear the psu's fan. I understand why you would want a psu that is silent at idle. I changed my Seasonic precisely because of it and I'm very happy that I made the change. Still, there is no need to go for a 1200W unit when you will be using less than 500W.

In any case, the psu will spin based on temperature and not wattage. Just food for thought... and since the temperature is based on the power consumption of the power supply, bigger capacity psu's doesn't mean less noise at same wattage. At the end of the day, a 1200W powering a 400W system at 95% efficiency will have to dissipate 20W... whereas a 750W powering the same system with the same efficiency... well... yup, the same 20W. Guess what the fan profiles will look like thumb.gif

In a perfect world yes they would dissipate the same 20W, but PSUs are largely perfect. For a 750w psu to be 95% efficient, youll only be able to load it to 300w. Of course depending on the psu, so no that argument doesnt work, again i said if ti was a perfect world.

Pretty sure again that hes settled on a 1000w psu and not 1200 and i do agree in this case 1200 would be pointless.

Depending on the psu as well a few do it off load and a few do it off temperature so depends which one you buy.

You would be shocked to see how much you can save by being more efficient. And again dont listen to the master of the universe. In one post he says there not efficient at low wattages (which is true in SOME not all psus) in another post he tells you to get a 550w psu for a 400w load (which contradicts exactly what he says about inefficiency as the more you load a psu past 40-50% the MORE inefficient it becomes. Again this is fact and not mumbo jumbo.
    
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post #22 of 43
Quote:
Originally Posted by sebna View Post

I would hope that I will be more like 105% of time not putting even close to 50% of its capacity wink.gif And this scenario is exactly the reason why I am interested in P2 1000W PSU because with this kind of loads it becomes effectively fan-less PSU but able to maintain top-notch regulation and ripple suppression which I will need for my OC. Also it will run coolish as not stressed and still at platinum efficiency so Win-Win situation. Overhead is also a welcomed bonus in case I would ever like to power two GPUs. Why is it so hard to get across?

RMi / RMx have some bizarre fan profiles :/, actually more or less all Corsairs independent of series do... looks like truly fan less are EVG out of those two brands.

Its just everything is becoming so power efficient. No worries though! youll be very happy with the p2 mines silent with two 980 ti and ocd x99 system.
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post #23 of 43
Quote:
Originally Posted by Stockings View Post

Its just everything is becoming so power efficient. No worries though! youll be very happy with the p2 mines silent with two 980 ti and ocd x99 system.

This is so true especially with the 1080/polaris 10 around the corner. Supposedly the 1080ti will be a bit more of a power guzzler then the 1080 though so still not too efficient. Im curious to see how Vega will do. As of right now 4690k and r9 390 with the hdds, 12 fans and water pump and what not im up in the 400w range easy.
    
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post #24 of 43
Thread Starter 
Thank you guys for an input it is very helpful.

I was going through the graphs from PowerUp test and they do not match-up (for 1000W unit). Because of it they do not make much sense, unless I am missing something.

For P2-1000 those two are published:

27295496305_94374e2ab4_o.jpg

From the above we can read that the fan only kicks in at 500W load and goes very loud very quickly.

But from below picture we can read that the fan kicks-in in fact at 300W - 309W depending on cross load.

27262221456_064051a0df_o.jpg

While for P2-1200 PSU the graphs do match up nicely:

26689477393_dfd911b809_o.jpg
27295628165_c4de01c543_o.jpg

From above we can read that the fan will kick in at around 375W depending on the cross load and it is same on both graphs.

It is probably a mistake in graphs for P2-1000 and I would imagine that fan kicks in for it at 300W... what do you think about it? Is it a mistake or am I missing something. If you think I am wrong in my interpretation please explain why you think so.

Cheers
Edited by sebna - 5/27/16 at 6:16pm
post #25 of 43
Thread Starter 
BTW , the fan on P2 PSU is of course sucking the air into the PSU and through it out of the case?
post #26 of 43
RM1000i has served me very well.
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post #27 of 43
Thread Starter 
How is the fan and noise on your Corsair?

At this stage I am pretty sure it will be either EVGA P2 1000 or P2 1200 for me.

Which ever spins its fan later...
Edited by sebna - 5/28/16 at 3:18am
post #28 of 43
Quote:
Originally Posted by sebna View Post

How is the fan and noise on your Corsair?

At this stage I am pretty sure it will be either EVGA P2 1000 or P2 1200 for me.

Which ever spins his fan later...

Ive had my rm1000 with my current setup for a couple months. At 400w load peak, my fan has never ever turned on, not even once so i cant answer your question. But at 500-800rpm pretty much all fans are dead silent so you wont hear it.
    
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post #29 of 43
Thread Starter 
I have just looked it up. It has best fan profile from all Crosairs I have checked so far. No Fan till 400W and very quite operation after that! That is what I am after. Such a shame performance is on the weak side. Still it is something worth considering as it is cheap in compare to P2 series.

Any views on graphs posted earlier?
post #30 of 43
Quote:
Originally Posted by sebna View Post

I have just looked it up. It has best fan profile from all Crosairs I have checked so far. No Fan till 400W and very quite operation after that! That is what I am after. Such a shame performance is on the weak side. Still it is something worth considering as it is cheap in compare to P2 series.

Any views on graphs posted earlier?

Performance on the RMi/RMx is FAR from weak, both PSUs are ranked Tier 1 meaning its the best of the best, youre probably looking at reviews for the older RM series. As far as i know the RMi/RMx are top notch with a 10 year warranty now.
    
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