ANTEC NSK2400 PSU SU380 FAN SWAP

udi13 · Post by **udi13** » Thu Nov 29, 2007 12:50 pm

Hi
After i decide to give up my warranty I hade swap me PSU fan to
Nexus 80mm Fan SP802512L-03

Here is some number:

PSU (after fan swap)in idle mode:
Fan set to fix 1000 rpm with the zalman ZM-MFC2 fan control
Exhaust temp 29c â€“ 30c
Heatsink 35c â€“ 37c
The fan swap take me no more than 15 mints

I will late the picture talkâ€¦â€¦

The PSU is out of the case...

The fan is out...

The original fan...

The fan connector...

The new Nexus fan is in...

The exhaust temp sensor...

Here is the link to my HTPC quiet rig on the General Gallery
viewtopic.php?t=44880

Hope i was helping

djkest · Post by **djkest** » Thu Nov 29, 2007 4:42 pm

Very nice, thank you. I would suspect many people are interested in this, as it is probably very similar to the Earthwatts PSUs, which many of us have, and are a little loud for our SPCR tastes.

So your temperature readings are after the fan swap? Have you tried loading up your power supply as much as possible to see if it overheats? Also, it is obviously quieter, but could you please describe the before and after noise you perceive? Thanks.

bendit · Post by **bendit** » Thu Nov 29, 2007 8:59 pm

hmm nexus usually was not used for fan swap because it wouldn't start at low voltage? I hope yours starts! most use the L1a or m1a or the Scythe equivalents.

udi13 · Post by **udi13** » Thu Nov 29, 2007 11:36 pm

Hi djkest
The temp is after the fan swap, i didn't load it to the maximom,
Only up to w150 (for me is more than the average use i usually dont go above w110-w120)
As for the sound of the fan, the best way to describe it, is that the sound
Is blended with environment (and the environment is quite

)

Bendit, the fan is set to fix 1000 rpm with the zalman ZM-MFC2 fan control

All the best

dannotto · Post by **dannotto** » Mon Dec 03, 2007 3:09 am

My hint, soft mounting for Nexus 80mm PSU Fan. At 1000 rpm is verry quiet, but this fan has high level of vibration.

udi13 · Post by **udi13** » Mon Dec 03, 2007 5:35 am

Thanks dannotto I will do it

bp · Post by bp » Tue Dec 04, 2007 8:45 am

hey !

wonderful ... I was thinking about changing my earthwatt 380W fan ! I also have one of those ADDA fans ....

mine will be a noctua NF-R8 ... lot of airflow, ultra low noise (reviews says so).

My question is : is it with a 2 or 3 wires connector for the fan ? because you did it in 15 minutes, I think your nexus fan already had the matching 3 wires connector ? Am I right ?

thanks very much. I feel wayyy more confident in changing mine ...

Best regards,
bp

udi13 · Post by **udi13** » Tue Dec 04, 2007 10:12 am

Hi bp
The nexus fan already had the matching 3 wires connector,
But i didn't connect it to the psu, i connect it to the zalman fan control,
The fan is set to fix 1000 rpm & give me the same temp as with the original ADDA fan...(I test the temp on the psu up to load of w150, it is more than the average daily use w60-w90 & I don't go above w110-w120 in anyway)

Probable the noctua is moving less air than the ADDA fan in the low voltage, so maybe your psu will be a little more worm, but I don't think
That you need to worry about it, cause the ADDA fan keep it very cool
So anyway the little extra temp with the noctua fan will not harm your psu
But if you want to go on the safe side, I will suggest you to monitor the temp before & after the fan swap

Are you going to connect the noctua fan to the psu or to a fan control?

Regards
Udi

bp · Post by bp » Tue Dec 04, 2007 10:54 am

I was thinking about the PSU fan control.

How do I measure the thermal condition of the PSU, from a motherboard point of view ?

Is the PSU not secured to avoid running when no fan is connected ?

but yes I could instead use maybe the molex connector of the noctua and hope the airflow will always be high enough ...

bp

udi13 · Post by **udi13** » Tue Dec 04, 2007 11:54 am

If your PSU fan control is like mine (ANTEC SU380)
Its mean that the Fan Voltage is set to v4.4-v4.8 Up to w150
http://www.silentpcreview.com/article592-page2.html
I don't think you can measure the thermal condition of the PSU, from a motherboard point of view...
And i really don't now if your PSU secured to avoid running when no fan is connected...
If you will set the fan to v12 via molex connector it will be very good from
The airflow and cooling point of view but not good from the silent aspect.

Regards
Udi

bp · Post by bp » Tue Dec 04, 2007 12:09 pm

yes but when talking about molex connector, I tought about also using the ULNA resistor available with the new fan. Of course without, 12V is too loudy. That way, I loose total thermoregulation.

4.5 V is already a bit high for the noctua fan, but I am not sure about that. Could stilll think about some resistor to adjust versus the integrated fan regulator, if needed.

Also, the 4.4-4.8V are on your PSU, not exactly the same as mine (earthwatt 380W)

Thanks anyway.

Still need to find out how to measure temperature in and out of the PSU.

udi13 · Post by **udi13** » Tue Dec 04, 2007 12:16 pm

Good luck with the fan swap

bendit · Post by **bendit** » Mon Dec 10, 2007 11:30 pm

udi13, what is the black housing on the wire from the nexus? Did you rig that up or is that the nexus wire? Did you have to extend the nexus wire? Did you connect fan controller to 3 pin mobo connector?
thanks!

udi13 · Post by **udi13** » Tue Dec 11, 2007 6:12 am

Hi Bendit
The black housing on the wire was just cut out from the original fan wire
And put on the nexus wire.
I didn't need to extend the nexus wire, because I connect it to
A fan control on the 3.5 bay

Udi

bp · Post by bp » Tue Dec 11, 2007 2:48 pm

My antec earthwatt fan swap :
1st of all, I could open it without too much damaging the warranty sticker. Second think, I found the ADDA fan and it has the sticker on it not centered at all -> removing it already made the fan less vibrating and less noisy. I guess I got a rare example... I was surprised my PSU was so noisy when it was reviewed on this website (and other) as nearly as good as a seasonic (from a noise point of view, with low to medium load).

I insisted and proceeded to the fan swap (with a noctua NF-R8 ). I found a way to swap the wires into the 2 pin-connector (pushing with a screwdriver on the pins into the connector allows to remove it), so that I could connect it to the regulator into the PSU. But at startup, the noctua fan didn't start ! with some finger help, it could run, but it is too slow to move enough air. So I use the normal 3 pin connector, bundled it with the other wires coming out of the PSU and powered the fan from a molex connector (with the L.N.A. to reduce voltage and noise). Connecting it to the motherboard wasn't possible since my fan connectors are located too far (on the bottom of the case).

I also changed my antec tricool with a 12cm noctua.

My next noisiest component is the harddisk, so I am happy with the fan swaps.

note : I will post more details and pictures in a few days...

bendit · Post by **bendit** » Tue Dec 11, 2007 3:26 pm

bp can you talk more about the two pin connector and how you worked that and how it connects to the 3 pin connector of the fan? what did you do with the screwdriver? thanks! I am going to do this swap with a medium speed scythe 80mm minebea.

udi13 · Post by **udi13** » Tue Dec 11, 2007 11:44 pm

Hi bp
Congratulations and welcome for the big family of fans swaping

try monitor (if you can) the temp, and see if the PSU don't
Get very hot....

Hi Bendit
You can use this articale in concern of the two pin connector:
http://www.silentpcreview.com/article83-page1.html
The connector in the articale is the same like in the ANTEC SU380

Good luck
Udi

bendit · Post by **bendit** » Wed Dec 12, 2007 7:04 am

udi I have the earthwatts 380w! It seems a bit different.

udi13 · Post by **udi13** » Wed Dec 12, 2007 7:34 am

Anyway, good luck with the fan swap

bp · Post by bp » Thu Dec 13, 2007 7:29 am

Hi Bendit,

about the connectors :
original state :
* a 2 pin-connector for the ADDA fan (red = power, black = ground)
* a 3 pin-connector for the noctua NF-R8 (read/black wires + yellow = speed measurement)

To unlplug a wire from the white plastic connector, I use a screwdriver. First you have to now that the wire ends with some metallic pad attached to the wire. That metallic pad is some kind of V : one side attached to the wire (wire come from above the V), the other to clip onto the plastic connector. when pushing with a screwdriver the metallic pad, the V gets smaller, and by pulling on the wire, it gets out of the plastic connector. This is a bit tricky, and with such small connector you better have good dexterity (and a small screwdriver too). Swapping the plastic connector isn't a perfect match (the V isn't exactly the same heigth onto the two fans), but that way the wires doesn't need to be cut, and there aren't exposed metallic pads (I bend the yellow wire and used some tape to isolate it, you never know what it could touch into your PSU). Also check the wires are well clipped into the plastic connector, it could be weird to have your PSU fan unplugged after some time ...

good luck.

See you.

AznJason · Post by **AznJason** » Fri Dec 14, 2007 4:00 pm

For someone who doesn't want to remove the plastic stuff (not can't, I've done it before, just... I want to leave it as is this time), which of the four adapters is it? I can't tell between C and D.

http://www.coolerguys.com/32pa.html

winguy · Post by **winguy** » Fri Dec 14, 2007 8:02 pm

dannotto wrote:My hint, soft mounting for Nexus 80mm PSU Fan. At 1000 rpm is verry quiet, but this fan has high level of vibration.

Aleksi says it is not possible.

udi13 · Post by **udi13** » Sat Dec 15, 2007 12:17 am

Hi winguy & Thanks...Yes I read Aleksi post....
Anyway I order 4 Nexus soft mounting from Ebay,
After I will resaved them I will post a replay...

Udi

udi13 · Post by **udi13** » Mon Dec 17, 2007 4:08 pm

Hi winguy
I just replace the 4 screws with the Nexus Ultra Soft Silicon Fan Mounts,
It is almost not possible but in the end it become possible,
It is true that the PCB board is literally touching the fan frame,
So I band a little bit the frame of the holes that is opposite to the PCB,
And mange to put the silicon mounts and everything is working just fine,
Here is some picture:

Thanks dannotto

for the hint

yamahaSHO · Post by **yamahaSHO** » Mon Dec 17, 2007 6:21 pm

Bendit wrote:hmm nexus usually was not used for fan swap because it wouldn't start at low voltage? I hope yours starts! most use the L1a or m1a or the Scythe equivalents.

What is the output voltage to the fan from the PSU. I have some spare Nexus fans and I was planning on using one for this swap. Would that be a bad idea? Should I find a different fan?

udi13 · Post by **udi13** » Mon Dec 17, 2007 11:35 pm

Hi yamahaSHO
According to the silentpcreview test the output voltage from the PSU is v4.4-v4.8 up to 150w, my Nexus swap fan start at v7, but he is conect to A Zalman fan control & not to the PSU & set to work on fix rpm1000.

bendit · Post by **bendit** » Tue Dec 18, 2007 7:54 pm

I am going to use the scythe dfs fan that came with the mini ninja. it's fairly low speed and is known to start at low voltages!

yamahaSHO · Post by **yamahaSHO** » Tue Dec 18, 2007 9:36 pm

That's a good idea as I have a mini Ninja coming my way. Thanks!

udi13 · Post by **udi13** » Tue Dec 18, 2007 11:47 pm

Hi Bendit & yamahaSHO
It is good idea...
In v4.4-v4.8 up to w150 he will run a speed of 800-900 rpm & but he much more quit than the original PSU fan,
He is louder than the Nexus, But he move more air.
From my point of view, I hade prefer less CFM & to have a more quite
Fan (after monitor the temp of course)
Good luck

bendit · Post by **bendit** » Wed Dec 19, 2007 9:26 pm

did my fan swap with the scythe dfs that came with my minja. I was going to try to plug the three pin fan connector into the two pin but I broke one of the pins off on the antec board. So I ended up taking the three pin cable through the back and plugging it into the 5v connector of a Zalman multi connector in my case. the fan is running slow and seems a bit quieter than the high speed adda. I wish it was easier to use the Antec fan controller but its a pain!