Asetek 645LT for the SFF community!

ulph

Case Bender
Aug 12, 2019
2
0
Could be air in the pump. Try flipping the case so the rad is on top and shake it to get the air out. Leave it running for a while upside-down and see if it gets any quieter.
Tried that and no change unfortunately. It would be interesting to compare. I will upload a video exemplifying the noise
 

AseDen

SFF Lingo Aficionado
Original poster
Asetek
Dec 7, 2018
124
213
www.asetek.com
Is this Asetek 645LT AIO in stock anywhere? Looking for one delivery to Australia.
My best bets would be Overclockers UK, Caseking.de or SFFLabs. If none of these do, please do contact me and I will see what I can do :)

Tried that and no change unfortunately. It would be interesting to compare. I will upload a video exemplifying the noise
I would love to see/hear the video on your noise. Should be relatively easily discernable what the issue is :)
 

cardinaL

Cable Smoosher
May 23, 2019
10
0
Tried that and no change unfortunately. It would be interesting to compare. I will upload a video exemplifying the noise
Well, is has been a while since I wrote last time.. and still I have troubles to get the pump to acceptable noise levels. Also, I tried to flip the case up side down in order to remove potential air inside the rad. I even switched my mainboard from Asus to Asrock and still same issues..

@Ulp we seem to have the same problem.. did you get any further with this?
 

AseDen

SFF Lingo Aficionado
Original poster
Asetek
Dec 7, 2018
124
213
www.asetek.com
Well, is has been a while since I wrote last time.. and still I have troubles to get the pump to acceptable noise levels. Also, I tried to flip the case up side down in order to remove potential air inside the rad. I even switched my mainboard from Asus to Asrock and still same issues..

@Ulp we seem to have the same problem.. did you get any further with this?
It's very hard to judge without some sort of audio representation.
There will always be a little risk of air getting trapped in the pump in the Dan Cases A4, due to the radiator being lower than the pump. That being said, it shouldn't be something that is audible 1m away - unless you're overly sensitive ;)

I'd be happy to give anything a listen and help as much as I can :)
 

cardinaL

Cable Smoosher
May 23, 2019
10
0
It's very hard to judge without some sort of audio representation.
There will always be a little risk of air getting trapped in the pump in the Dan Cases A4, due to the radiator being lower than the pump. That being said, it shouldn't be something that is audible 1m away - unless you're overly sensitive

I'd be happy to give anything a listen and help as much as I can
Hi Dennis,

I uploaded a sound sample on the 24th of may in this thread and you actually replied on that :) I really do consider to RMA my AIO as I doubt that my device is working properly. It is literally ramping up to berserk mode when starting games.. I have no explanation
 

AseDen

SFF Lingo Aficionado
Original poster
Asetek
Dec 7, 2018
124
213
www.asetek.com
Hi Dennis,

I uploaded a sound sample on the 24th of may in this thread and you actually replied on that I really do consider to RMA my AIO as I doubt that my device is working properly. It is literally ramping up to berserk mode when starting games.. I have no explanation
Sorry cardinaL - so many forums, so many replies... And I'm getting old :p
I'd definitely RMA it if I were you. This AIO is a little tricky due to it's primary use case being "out of spec" for liquid coolers (pump at the highest point in the loop). But you definitely shouldn't hear rampant noises when playing games ;)

Also, if you've connected it to the AIO header on the motherboard - you're in for a World of trouble. I don't know who came up with the "brilliant" idea of calling that port for AIO, because all it does is slow down pumps which, especially in SFF (even more so the Dan Cases A4), is a bad thing. Why? Because less flow = bigger risk of air pockets forming.

Hope this helps you :)
 

HotTubWithChampagne

Case Bender
Aug 31, 2019
2
0
Hi, I've recieved my 645LT. After installing it in Dan A4 temperatures are fine with a 2600X.
What's the perfect RPM for this pump?

I own an Asus B450I Strix and connected the AIO to the AIO header. AI Suite 3 tells me the pump has about 5600 rpm, which would be double the normal speed of the pump which is 2800. So I think I have no super but a mainboard which doubles the number...
At this full speed, I can hear a little bit of rattling, maybe some air bubbles. Annoying. If I slow down just a little bit, this sound is away. If I slow further down, the pump gets very silent. Minimum speed is like 60% and 3800 rpm (in real 1900 rpm I think).

Does anyone know more about the pump and minimum RPM so the pump delivers the needed waterflow? Any idea why it doubles the shown RPM?
 

AseDen

SFF Lingo Aficionado
Original poster
Asetek
Dec 7, 2018
124
213
www.asetek.com
Hi, I've recieved my 645LT. After installing it in Dan A4 temperatures are fine with a 2600X.
What's the perfect RPM for this pump?

I own an Asus B450I Strix and connected the AIO to the AIO header. AI Suite 3 tells me the pump has about 5600 rpm, which would be double the normal speed of the pump which is 2800. So I think I have no super but a mainboard which doubles the number...
At this full speed, I can hear a little bit of rattling, maybe some air bubbles. Annoying. If I slow down just a little bit, this sound is away. If I slow further down, the pump gets very silent. Minimum speed is like 60% and 3800 rpm (in real 1900 rpm I think).

Does anyone know more about the pump and minimum RPM so the pump delivers the needed waterflow? Any idea why it doubles the shown RPM?
I would always suggest connecting to CPU_FAN. In your case it definitely reports twice the actual speed. There's no danger in slowing the pump a little, but you can potentially get a little lower performance :)

The PCB in the pump is actually made to be run at a fixed 2800RPM speed. Once again, though, as long as temps are in line, don't worry about the speed (if it's lower).

The doubling of the shown RPM has to do with different pumps sending different signals, and motherboards cannot translate that ;)