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Replacing PSU fan in Silverstone SFX 450w...? - Page 2

post #11 of 68
Will a Noctua Fan work on this PSC in terms of power specifications.
I understand that it needs to be a 15mm fan to fit inside but I was thinking of installing it on the outside of the PSU case.
I just want to know if it will work properly or if it’s a chance of burning the fan or even worst burning the PSU?

post #12 of 68
Originally Posted by sieade245 View Post

Further to Lemon's post, I have also successfully carried out this procedure on the modular version of the PSU the ST45SF-G. It was slightly easier as the fan in the modular version is not soldered to the board. It instead uses a standard two pin fan header connection. This made it easy to remove from the board. I used the same fan, the BlackSilent Pro 80mm x 15mm. This comes with a 4pin PWM connector and also two 4 pin to 4 pin extension leads. I snipped the end off one of the extension leads, and also snipped the 2 pin header off the stock fan. I then used a terminal block to join the two leads together and voila.. the blacksilent pro now has a two pin header connection. The actual fan is untouched so can be used as a standard PWM fan in the future if required, only the extension lead was modified.....

I'm seriously considering trying this exact upgrade. The only thing holding me back is my lack of electric wiring know-how. Could you please go into more detail about how you converted the 4-pin connector to the 2-pin connector. I understand you used a terminal block, but where did you place each wire? Much appreciated!
post #13 of 68
How is your modified ST45SF-G holding out ?
The standard fan sounds like a hairdrier and I would like to follow your lead.
post #14 of 68
Just replaced the stock fan with the Noiseblocker fan. It makes a HUGE difference. My installation method was a little bit more ghetto than sieade245's. I just cut the 2-pin connector off the stock fan, stripped the wires and fed them into the black and red pin leads on the new fan. Then I super-glued them in place and wrapped it with a bit of electrical tape. I'm not too worried about this coming apart, and it was a lot less effort then soldering. Took me about 15 minutes from removing the PSU from my system to having it reinstalled with the new fan.

I've got the modular version of the PSU in case anybody was wondering.
Edited by seanjohn182 - 7/3/13 at 11:47pm
post #15 of 68
I have ordered my BlackSilent Pro, and I plan to use these:-

I was hoping that Sieade245 would have given us a progress report. Hope he hasn't had a fire.
post #16 of 68
I have been looking everywhere to get the BlackSilentPRO in Canada, but so far can't find it... frown.gif

After some searching, the best replacement i can find is the
on Digikey.

I have access to a thermal camera, so I will try it out and let you guys know.
post #17 of 68
The digikey fan clicks loudly, so thermal performance is moot.
post #18 of 68

stock fan : 36.72 CFM 5.90 mm H2O static pressure

PC-P 80mm x 15mm Ultra Silent Fan: 30.6 CFM 1.89 mm H2O static pressure

the fan of a PSU is MATCHED to the thermal demands OF the PSU.

what you are doing is not just destroying the PSU but also put EVERYTHING ELSE connected to the PSU in danger. if you don't mind your entire system go up in flames, feel free.
Originally Posted by SilverStone View Post

The fan inside the ST45SF is regulated to spin up in relation to its internal temperature. So the cooler you keep it, the slower its fan will run.

We have a rough fan speed graph on our ST45SF product page that shows the fan will spin up to only 2800rpm at full load. But this is in a 25℃ ambient environment:


At 40℃ environment however , the fan in the ST45SF will spin up to 2800rpm at only 70% loading (around 300W) and up to 3700rpm at full load.

I would definitely recommend against replacing the original fan with a slower one if your ST45SF is already running hot!

there IS a reason why he posted this....
post #19 of 68
Just to post a quick update. It’s now been about a year since I swapped in the Noiseblocker NB-BlackSilentPro and it has held up perfectly and still virtually silent. Sitting on my desktop, this is my primary gaming rig with a full sized hot-running graphics card.

Also, based on a tip from another forum, after swapping the fan I reinstalled the power supply module UPSIDE DOWN. Configured this way the fan now intakes in cool ambient air from the top of the case versus dragging hot air from inside the case over the PSU components. Before making this change, the back of my case would get very hot to the touch but it’s completely cool now.

Surprised to hear some folks are having trouble finding the Noiseblocker. I got mine from frozencpu.com and last I checked it’s still in stock there. Great enhancement for the acoustically conscious. If not, or unsure on the wiring probably best to stick with the manufacturers configuration as others have suggested. Small form factor rocks!
Edited by Lemon-scented - 8/9/13 at 4:56pm
post #20 of 68
So is it correct to say that the currently used fan in the PSU is a Young Lin Tech DFB801512h ? According to the PDF, it only moves 30.16CFM of air with 2.38mmH2O airpressure.

I ask this because it's shown in to the JohnnyGuru review, and I am trying to find out whether the Noiseblocker PC-P should suffice as a replacement, from a technical point of view. If the fan is indeed the DFB801512h, the specs are perhaps not as overpowered as psyclum suggested earlier, and I would feel a lot better about the fan-switch mod.

Can some-one confirm the make of the fan in the PSU? Am I missing something important here?

@ Psyclum: where did you find those specs? Could you direct us/me to the source?biggrin.gif
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