A Detailed Look
The Seasonic PRIME 600W Titanium Fanless power supply enclosure is painted matte black and measures 170mm (6.7”) deep. The back panel includes an On-Off switch, AC receptacle and open honey-comb grill.
All four sides and the top of the chassis have an open grill structure to help maximize airflow. Without a fan to provide forced air flow for cooling the fanless model must rely on passive convection cooling to keep all the internal bits cool. High efficiency really helps but at max power this unit still will have to dissipate almost 50 watts of heat.
Caution: It is very important to provide excellent case airflow for a fanless power supply to operate properly. The last thing you want to do is install one inside a sealed enclosure (or standard case with no case fans).
The front panel on the 600W fanless PSU incorporates ten modular cable connectors, which are nicely keyed and labelled. The upper third has an open honey-comb grill.
All of the modular cables are the flat ribbon-style except for the 24-pin ATX cable, which is sleeved with a black nylon mesh covering.
Under the Hood
Here are a few pictures showing the layout and components inside Seasonic PRIME 600W Titanium Fanless power supply. The overall layout and build quality appears to be excellent.
The Fanless 600W PSU features an advanced Seasonic PRIME circuit design for high efficiency. All of the capacitors used inside the PSU a nice mix of Japanese made electrolytics and solid polymer caps. The PRIME 600W fanless PSU uses two primary bulk capacitors made by Nippon Chemi-con rated for 450uF and 390uF, 400V and 105°C.
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In what world is this
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In what world is this F*****G power supply going to stay below 40degC to keep from dropping down to 480W?
It will also dissipate much MORE HEAT into the main case anyway thus the other parts will have fans spin up more so it may be louder anyway.
I doubt you’d make a completely FANLESS system either (I know they recommend against that) since if you needed that much power and had no fans I doubt you’d keep the temperature below 40degC (especially in warmer areas).
Maybe I’m just stupid, but can anyone explain who might use this besides someone with relatively LOW POWER draw who wants a really quiet system (for which their already are PSU’s that turn OFF their fans anyway)?
At over 91% efficiency, only
At over 91% efficiency, only 9% of electricity is converted into heat, which in the case of this power supply, is 54 watts at 100% load. It’s negligible.
I use a Fanless SeaSonic SS-520FL2 in my system paired with an overclocked 1080 Ti. It’s a flawless operation. The system is liquid cooled with fans set to barely audible levels, so even under load, you can’t hear anything.
Your math is backwards,
Your math is backwards, although your error in this case is rather insignificant.
The 91% are what the power supply delivers. 100% is what it draws from mains. In a simplified scenario, if the PSU delivers 600 W with a 91% efficiency, then it draws around 659 W from the mains (659 * 91% = 600). Thus, the loss is not 54 W but 59 W.
To add to your point for
To add to your point for his/her benefit:
A simple shorthand for figuring out this sort of problem is to take the power out and not do any sort of multiply but rather perform a divide. Power out divided by efficiency equals power in. Power in minus power out equals power lost in conversion.
600 watts out / 0.91 efficient = 659 watts in
659 watts in – 600 watts out = 59 watts lost in conversion
You can always mount the PSU
You can always mount the PSU _outside_ the case (if the case allows of course)
Done it once at a system with dual Nocona Xeon’s.. That was the only option to lower overall fan noise..
Unfortunately back then the max fanless PSU you could find was topping at 300W..
Blower style GPU is probably
Blower style GPU is probably what this is intended for.
80+ Silver is a rating which
80+ Silver is a rating which no one seem to aim for anymore. You can find numerous power supplies rated for everything under the sun but not 80+ Silver. I wonder why that is.
Well many Dells, HPs and
Well many Dells, HPs and other PCs are usually been with 80plus silver PSU(With OEMs like Lite ONs, FSPs, Deltas). But now-a-days those too have been moving to gold rated ones…
I actually don’t remember seeing silver rated psus on normal retail sale.
Sort of agree, any power
Sort of agree, any power supply of this size should come with a fan. You decide to run it at the speed, sound of your desire. Heat rises.
Couple of fan headers would
Couple of fan headers would be nice.
40degC vs 9% heat
40degC vs 9% heat dissipation.
First off, HEAT and TEMPERATURE are certainly related but it’s the DENSITY of heat that matters most, especially if a temperature sensor is near components in the PSU that get hotter than the average temperature of that PSU.
Remember that the INTERNAL case temperature can get pretty high, though of course it’s much lower at the bottom. However, I have a sensor at the BOTTOM of my motherboard hitting roughly 50degC when gaming (i7 + GTX1080, 3xNoctua case fans at 700RPM).
So how hot is this PSU getting in a typical case at say 500W PSU load? (the spikes you should care about)
So adding 50W or so of heat raises the temperature above whatever it would normally be just sitting at that point in the case. If you’re at 35degC then maybe that’s enough to hit 40degC.
*As a solid product it may make sense as a long-term investment, but I’d like more numbers on how close to the 40degC cut-off it’s getting to based on (at 500W+ power draw):
a) ambient room temperature, and
b) case cooling
In the SUMMER if I hit 30degC for example would I drop down to 480W power load in a particular system?