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AX vs RM quality / silence


warmmilk

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So I was all set on getting an AX860i for my next build (prolly ordering parts on sat) and then the RM come along with all of its silence optimized features and specially selected caps and stuff... Does this imply that the RM components are better than the AX? Silence is more important to me than efficiency, especially when it comes to coil whine. Or does the AX have even better components? Does the RM have any advantage over the AX in the silence department other than the fan not starting till 40% load as opposed to 20%ish?

 

If my ultimate goal is a silent build (lots of rads and very low rpm fans), money not being an issue, am I better off with an AX860i or an RM1000?

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Actually since these PSU just hit the market there has been no feedback here yet.

Does the RM have any advantage over the AX in the silence department other than the fan not starting till 40% load as opposed to 20%ish?

Where did you get those figures from? They are basically the same. The AXi series is 40% load and about 49c temp wise before the fan starts. And it can be any combination of the two. It doesn't necessarily have to be one or the other.

 

Looking at the fan curves of the new RM series, they appear to be identical or near identical as far as that is concerned. Although the graph for the AXi series shows up to 60% load for the fan. However RamGuy has stated quit a few times that it is about 40%.

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Actually since these PSU just hit the market there has been no feedback here yet.

 

Where did you get those figures from? They are basically the same. The AXi series is 40% load and about 49c temp wise before the fan starts. And it can be any combination of the two. It doesn't necessarily have to be one or the other.

 

Looking at the fan curves of the new RM series, they appear to be identical or near identical as far as that is concerned. Although the graph for the AXi series shows up to 60% load for the fan. However RamGuy has stated quit a few times that it is about 40%.

 

I'm more interested in the caps specifically selected to quiet operation and no coil whine that they advertise for the RM. If I get the AX psu, am I getting the same caps? Or maybe something even better? I'm just wondering why that specifically is advertised for the RM and not the AX, makes me wonder if the RM is better in this department than the flagship AX...

 

I was actually hoping to get a response from someone that works for Corsair, but if someone other than that knows the answer and not just guessing, that works too

 

 

as far as fan curve, got it off the Corsair page for each psu

 

http://cwsmgmt.corsair.com/media/catalog/product/a/x/ax860i-fan-noise.png

 

http://cwsmgmt.corsair.com/media/cms/psu_charts/RM1000-FAN-NOISE.png

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I just did a build with a AX760i , haswell i7 4770k, evga gtx770 acx, gb g1-sniper and the 70c case.

the only thing I hear is the hdd, the fan of the 760i is not most quiet one but also not a load one, the only time i heard the fan spinning was when I did several hours of heavy benchmark and stability tests and this with pc case side panel off and my ear close the psu, because I wasn't sure if the fan was spinning. After installing link I could see it in the software.

Only at start-up of the pc you hear how load it is.

I could say the AXi are dead silent, till you do heavy load for hours with your pc, consume more power from it and then you still have to hear very close to it, because it's still very silent, no coil whining with this psu.

That's why I always take one that has more power, like if the build needs 400w I'll take a 600 a 700w psu.

This way the psu only have to give 50% a 60% of his power, the efficiency is normally at it highest then and the fan doesn't have to make much rmp for cooling.

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