EN – Problems with new Magicool DCP450
Willkommen in der Mk-Community › Foren › Kühlung › Wasserkühlung › EN – Problems with new Magicool DCP450
- Dieses Thema hat 22 Antworten und 4 Teilnehmer, und wurde zuletzt aktualisiert vor 6 Jahren, 7 Monaten von VJoe2max.
-
AutorBeiträge
-
-
26. Juli 2017 um 17:07 Uhr #961021katerTeilnehmer
Hello guys!Sorry, my German is quite schlecht, so let me use English :)I’ve just installed DCP450 in my frech LC system and I’m afraid my pump is quite loud. Specifically, it is whining – a high pitched noise. Not a low hum, not anything like a hum. But simply high frequency whine. It’s not very loud, but super annoying.Has any of you perhaps encountered a similar behavior?I bought the pump because many places (this one, too) praised it for being very quiet.
-
26. Juli 2017 um 18:07 Uhr #963366ThaRippaAdministrator
Hi, there should be no such noise providing the pump is not beating an air bubble. That should be next to impossible though because of the construction with the reservoir on top. Maybe you got a faulty unit?
-
26. Juli 2017 um 18:07 Uhr #963367NeronAdministrator
Hey kater,it is probably not the pump that is whining. I think the whining is caused by the GPU often by its coils – the phenomenon is called “Coil Whining”. There are a few examples on youtube. When you get closer to the pump, does the sound get any louder? Does the sound also get any louder or even disappear when there is heavy gpu load?
-
26. Juli 2017 um 19:07 Uhr #963368katerTeilnehmer
@ThaRippaI only had about an hour to vent the system. Did some shaking and dancing around, plenty of air got away (have clear tubing, so it’s easily visible). It’s my first LC and the first pump so I have no comparison. That said, everybody I talked to assured me it’s an exceptionally quiet pump. Unfortunately, I also think is just faulty.@ NeronMy current setup is 2500K + 1070. It’s true that the card has a coil whine, especially when displaying a few hundred FPS (e.g. game menu etc.) – so this phenomenon is well known to me. But it’s a completely different sound and is easily distinguished from the pump’s whine. The VGA is more like a mosquito, while the pump is just differentIn idle neither the card (EVGA 1070) nor the PSU (Seasonic Prime Ti) make any sound. Even on air the setup was practically silent (no HDDs, either, and only 3 x fans 120mm @ 500-600 RPM) – I’m very noise-consciouss (unfortunately!).Also, the sound is the same all the time, doesn’t change in any scenario – idle, gaming, synthetic benchmarks…@ allThe rest of my LC system:EKWB CPU & GPU blocks, Magicool 360 G2 Slim, EKWB fittings, valve & plugs, and obviously the DCP-450 (the new revision, with 2 ports on the top). The fans I’m using on the rad now are Scythe sth sth 120mm @ 500 RPM, I’ve had them before and they are 100% OK and v quiet.PC:2500K @ 4,5, 1070, GB Z77X-D3H, 8 GB RAM, 2 x Crucial SSDs, Seasonic Prime Ti 650W, and the case is SilentiumPC Pax M70 (yeah, not perfect for LC but that’s what I have now), plus a no. 4 Scythe fan in the exhaust.
-
26. Juli 2017 um 22:07 Uhr #963369ThaRippaAdministrator
Reach out to your supplier for an RMA. I’d even buy a second one and return the first one after confirming the fix.
-
26. Juli 2017 um 22:07 Uhr #963372katerTeilnehmer
Yeah, that’s pretty much what I had in mind – but I completely understand the subjectivity of noise. For me, a good 120mm fan (Scythe, Noiseblocker, Noctua, FDB / rifle bearing – no balls!) would be practically silent (or inaudible) at 500-600, but 700 RPM is also great. Still, my pump is definitely louder than that, perhaps in the range > 1000 RPM. And also super annoying…Anyway, I’m calling the shop tomorrow and will try to arrange for them to send me a new one before weekend.
-
26. Juli 2017 um 22:07 Uhr #963371ThaRippaAdministrator
That is hard to compare. A good pump is inaudible to me. A good fan is inaudible under 700 or so. That’s all very subjective.
-
26. Juli 2017 um 22:07 Uhr #963370katerTeilnehmer
I’ll do that – the whining is driving me crazy :(Also, if you could please compare the noise your pumps (DCP-450 only) make to e.g. a quality 120mm fan – at what RPM would that fan have to work to be comparable with a good pump?
-
26. Juli 2017 um 23:07 Uhr #963373NeronAdministrator
The DCP450 is the most silent pump i’ve ever had. Therefore this was seems faulty to me too.
-
27. Juli 2017 um 8:07 Uhr #963379katerTeilnehmer
Another thing – what’s the default RPM @ 12V in your units? Mine works at around 2700 RPM now. I also made some more dancing to get rid of air bubbles. Alas, still the whining noise. I can best describe it as if you live in an apartment and your neighbor is vacuum cleaning his. Anyway, making some coffee now and time to disassemble the whole damn thing 🙁
-
31. Juli 2017 um 10:07 Uhr #963398katerTeilnehmer
Here’s an update.All is cool now – the 2nd pump that just arrived and indeed is v quiet. No hi-pitched, irritating tone, no whining – just a smooth, v quiet sound that is not obtrusive in any way.Here’s some pics of my frugal loop – no hard tubing, not even a single angled connector – just some regular, functional stuff – http://http://tufotki.pl/cmzhU
-
31. Juli 2017 um 13:07 Uhr #963399ThaRippaAdministrator
Good to hear. I fixed your link. At least one angled fitting would greatly increase your loops visual appeal. Down on the Pump outlet, you know.Edit: Posts moved to separate thread.
-
31. Juli 2017 um 16:07 Uhr #963400NeronAdministrator
Simply rotating the pump would fix the problem of the missing angled fitting! ;)Nice and simple loop and glad to hear the pump is now quiet! :)Gesendet von iPhone mit Tapatalk
-
31. Juli 2017 um 16:07 Uhr #963401ThaRippaAdministrator
Neron;535204 said:
Simply rotating the pump would fix the problem of the missing angled fitting! 😉Thought the same, but then the drain port would also face to the left… hmm. :-k
-
31. Juli 2017 um 17:07 Uhr #963403katerTeilnehmer
Yeah, I guess I could turn it a little to the back, but that would also mean I have to shorten the tube going into the VGA, which means another draining session… and I just don’t feel like it :PI initially thought I’d have to use several angled adapters (45 and 90 deg), but when I dry-fitted the tubing, it proved sooo flexible – and as I was already over the budget, I ordered no fittings. The tubing has no kinks and fits inside the case – all I asked for 🙂
-
31. Juli 2017 um 17:07 Uhr #963402NeronAdministrator
In both cases, you need a fitting to connect a tube for draining. Therefor, it wouldn’t bother me. :DGesendet von iPad mit Tapatalk
-
31. Juli 2017 um 21:07 Uhr #963405ThaRippaAdministrator
I always urge newbies to have at least one 90 and one 45 degree adapter or fitting in their initial shopping cart. You can always use at least one. Anyway, turned out great.
-
17. September 2017 um 14:09 Uhr #964066katerTeilnehmer
Hi again,I come here with sad news – the second pump’s rez just simply cracked. By itself. I didn’t mess with it, didn’t re-tighten, didn’t even touch apart from screwing in a single fitting in the top end cap. Well, one of the C-holders was placed around it, the top one obviously, but that’s that. There were 2 vertical hairline cracks – so no major flood, no pool of water on the bottom of the case. Just drops of leaking fluid that I noticed after 1-2 days. I only noticed because I just was peeking inside to enjoy the view of the newly built LC.The shop replaced the second pump’s rez and send it back but I decided to sell it and will be buing a D5 combo soon.One more gripe I have with the DCP450 – the super soft plastic of the body. Meaning that even a slightest mistake / misalignment when screwing in a fitting results in a damaged / destroyed thread. I understand that given it’s price the pump is what it is, but I think even doubling the price for the sake of using a harder, more durable plastic would still make it a super attractive buy.
-
17. September 2017 um 16:09 Uhr #964067VJoe2maxTeilnehmer
Which fluid are you using? Is it possible that the fluid contains ethanol or any other monovalent alcohol?Vertical hairline cracks in PMMA tubes are usually a very reliable hint, that monovalent alcohols have performed their destructive work in terms of beeing the necessary solvent for the typical stress corrosion cracking of PMMA.A misalignment of the threads is very unlikley to be the reason for the craks, especially when using the currently sold version of the DCP450 with external threads on the PMMA-Part of screwed joint. This construction sets the PMMA tube under radial pressure. Therefore cracks by overloading the therads are very unlikly, since the tube is mainly set under compressive stresses. Edit: I was sadly able to experience the problem of stress corrosion cracking by my self, when I tried to celan the tube of my first DCP450 with the wrong cleaner. Accidentialy I have used a cleaner containing ethanol to remove some residues of the polishing compound that I have used for polishing the threads. Cracks within the PMMA tube where inevitable and occured immediately according to the high ethanol concentration of the cleaner. Lower concentrations can slow down the process, but even very low concentrations will raise the risk of stress corrosion cracking.Edit #2: Here is a short video that shows the stress corrosion cracking of PMMA when it comes in contact with pure ethanol: clickWith fluids that contain even very small concentrations of monovalent alcohols it could take some time, but the effect will be the same in the most cases.
-
17. September 2017 um 17:09 Uhr #964068katerTeilnehmer
I’ve only been using unadultered Aquacomputer Double Protect Ultra, clear. The fluid does contain ethane-1,2-diol, which AFAIK is ethylene glycol, which I presume is alcohol (sort of?). However, my knowledge of chemistry is very basic and I can’t say if it’s ok or not. (I also seem to remember that many other fluids, e.g. Mayhems, do contain glycol).That said, I understand that since many other LC parts are made of acrylic (e.g. I have an acrylic CPU block and GPU block), they would also suffer a similar fate?Coming back to problems with threads – no, I didn’t mean at all that this is what caused the hairline cracks. Just that the pump’s body (black stuff) is made of very soft plastic that is easily damaged in itself, potentially leading to leaking thread/fitting connections. I’m certainly not blaming this part for the cracked rez.Just to add – I didn’t clean the pump/rez at all during the few days I had it.
-
17. September 2017 um 17:09 Uhr #964069VJoe2maxTeilnehmer
Ethylene glycol is not a problem. That is a divalent alcohol, which does no harm to PMMA when used in common concentrations like they are used in the majority of watercooling-fluids. Could it be possible, that there was any ethanol vapor in der room, where you were handling the pump? Sometimes that´s enough for leading to such problems. But of course it could not be excludet, that the cracking has another reason, even though stress corrsoion cracking, induced by contact witch monovalent alcohols, is the most common an most frequently occuring problem, that leads to hairline cracks in PMMA-parts.Btw: Is it possible to make a photo of the cracks?Edit: The black outer parts of the pump are made of short-fiber-reinforced nylon (polyamide). Its surface may appear relatively soft, but the material has a good strength. There´s only one slightly concerning issue with nylon in contact with water, and that is its swelling behaviour. Dry nylon absorbs water and therby wells to a bigger volume. But the construction of the currently sold DCP450 version should pervent any problems due to this fact. Maybe it is a classic flaw from the production of the tubes. As the DCP450 is a very cheap pump, the materials used are surely not best quality.
-
17. September 2017 um 18:09 Uhr #964071katerTeilnehmer
Here are some shots http://tufotki.pl/RUrsnThere were two, very similar top-bottom cracks, both leaking v small amounts of fluids, but needless to say this scared me to hell and back. I’ve since sold the pump for a fraction of initial value. Oh well.I’ve returned the pump to the shop, they replaced the rez, reapplied the warranty stickers and sent it back. I did not use it, however, as I simply don’t trust this desing any more. I’ve really tried to make my LC a budget affair, but it seems you can’t cut some corners…No, no vapors in the room – I work from home (a freelacing translator) and I have a dedicated office room in my house. The only vapors I can think of could be my farts 😉
-
17. September 2017 um 18:09 Uhr #964073VJoe2maxTeilnehmer
Hmm, despite the absence of ethanol – that looks exaktly like cracks due to stress corrosion cracking. But I can understand, that you´ve lost your trust in that pump, after having so many annoying issues with it. From my aspect, the pump could be a much better deal, if they would sell it with a solid heavy brass cover instead of the reservoir. Even if many people have no issues with cracking or leaking, PMMA-reservoirs are a little bit anachronistic in times there reservoirs made of borosilicate glass are state of the art…
-
-
AutorBeiträge
- Du musst angemeldet sein, um auf dieses Thema antworten zu können.