After assembling everything there are two issues that are troubling me:
i) the Seasononic P-520 suffers from electronic whining. I find this very disappointing from what is broadly recognized as a high quality component from a top notch manufacturer. The review on SPCR
actually mentioned this, but I thought Seasonic had fixed this. Fortunately the noise does die down a bit as I move away from the PSU, however I can still hear it slightly over the noise of the FANs while sitting at my desk (my ears being about 1 meter away from the PSU in this position). When I keep my ear next to the PSU, the noise is much more audible (seems considerably louder than the -10 dBA mentioned in the review). Considering I'm not part of the 1% mentioned in SPCR review, is there anything I can do about this? Is there a chance that the electronic whining goes away after the capacitors have seen some more usage? Or should i RMA my PSU asap?
Sorry to hear you got the coil noise, i own 2 Seasonics X400 and X660 and both been perfect for me. Check the Seasonic 520W Platinum Fanless: Sample No. 3
As mentioned in the review, Seasonic reports that adjustments in the BIOS of some recent motherboards eliminates electronic noise completely with many earlier production samples. The settings are:
>BIOS set up to ENABLE ErP/EuP (S4~S5)
>BIOS set up to DISABLE Audio Always On
ii) Not being able to control the two 120mm CPU fans on the Scythe Mugen 4. Both fans are 3-pin FANs that are connected to CPU fan outlets on the motherboard (1 4 pin and 1 3 pin). I would expect the FAN controller on the motherboard to do PWM on the 12V line or even scale down the voltage on the 12V line in order to be able to control the fan speed. However, nada. I guess my best bet would be to get a pair of quiet 120mm PWM-controlled aftermarket FANS and daisy-chain those of the CPU FAN 4-pin connector? At 20 euro a piece that's an other 40 euro.
I thought you were going with the single PWM version =(, the single Glidestream 120 PWM is pretty good, its the version that was reviewed by SPCR and got the editiors choice. Scythe Glidestream imo is the best bet in terms of price, there are two versions, check the rpm range (i would go with the lowest). But if you are going with more noctuas, consider NF-P12 PWM and NF-F12 PWM both should work fine on heatsinks, check Noctua NH-U12S Slim Tower Heatsink
as they reviewed the fan there, the NF-S12A PWM is more for case fans and might have trouble with heatsinks, but its up to you.
The PC is definitely the quietest I've ever owned and is a huge improvement over my previous gaming notebook. However it is not inaudible at the moment. I want to see if I can reduce the noise footprint even further. Apart from the PSUs, the main culprits seem to be the CPU fans and the VGA cooler (30% is the minimum fan speed that I can set using Afterburner). Does anyone know of a method to reduce the fan speed of the VGA cooler below 30%? Any custom vBios around that allows this?
edit: I am impressed by the ability to control the Noctua NF-A14 PWM, controllable speed range is 126 RPM (10%) up to 1391 (100%).
You can flash the vbios with lower settings, but the main question is weather the fans on the GPU will allow to run lower than 30%, there are a lot of PWM fans that they have like deadzone where lower than that PWM % it will remain the same, this can be seen in a lot of noiseblockers and thermalright fans (noctuas are different), the questions is if the GPU fans can or not go into lower PWM %.