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post #1 of 61 (permalink) Old 04-26-2019, 04:58 PM - Thread Starter
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running a custom loop 24/7?

Going to be doing my first build with watercooling soon. I plan to do a custom loop with soft tubing to start. Likely using an Alphacool D5 pump (VP655). I haven't seen much on the subject of run times. Is it safe to assume the pumps last for years as long as not at 100% speed and routine maintenance and I could leave the system on 24/7 safely like I do now? Or would I want to start shutting it off when not in use? I do and would continue to shut it off if I was going on vacation or something for an extended time away from it. Just not clear on any reliability issues with 24/7 running.

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post #2 of 61 (permalink) Old 04-26-2019, 05:08 PM
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Should be no issues running it 100% 24/7 that’s what they are made to do.

I don’t have experience with that model but it shouldn’t be an issue.

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post #3 of 61 (permalink) Old 04-26-2019, 06:05 PM - Thread Starter
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Quote: Originally Posted by Shawnb99 View Post
Should be no issues running it 100% 24/7 that’s what they are made to do.

I don’t have experience with that model but it shouldn’t be an issue.
Thanks, I kinda figured that was the case but wasn't sure. I couldn't seem to find anything on expected pump life either so I figured I'd ask (not planning to do dual pump or anything). I know at least on my current system with a Noctua D14 cooler even if the fans bite it the passive dual radiator would still keep it alive until I found it, but that wouldn't work with water of course.

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post #4 of 61 (permalink) Old 04-26-2019, 06:19 PM
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Quote: Originally Posted by flyinion View Post
Thanks, I kinda figured that was the case but wasn't sure. I couldn't seem to find anything on expected pump life either so I figured I'd ask (not planning to do dual pump or anything). I know at least on my current system with a Noctua D14 cooler even if the fans bite it the passive dual radiator would still keep it alive until I found it, but that wouldn't work with water of course.

I have been running five MPC655 pumps (same innards as the Alphacool one) in two builds for about five years straight, with only shutdowns during holidays etc...finally re-configured everything just a few months back after cleaning. Biggest issue is doing a clean initial build (plenty of flushing, including final flushes with distilled water) watching out for 'mixed metals' in the loop, and running the right coolant mix with antimicrobial additives etc.

Regarding 'fail-over', as rare as a failure may be with these setups, you can always put two pumps in a serial arrangement...
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post #5 of 61 (permalink) Old 04-26-2019, 06:34 PM - Thread Starter
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Quote: Originally Posted by J7SC View Post
I have been running five MPC655 pumps (same innards as the Alphacool one) in two builds for about five years straight, with only shutdowns during holidays etc...finally re-configured everything just a few months back after cleaning. Biggest issue is doing a clean initial build (plenty of flushing, including final flushes with distilled water) watching out for 'mixed metals' in the loop, and running the right coolant mix with antimicrobial additives etc.



Regarding 'fail-over', as rare as a failure may be with these setups, you can always put two pumps in a serial arrangement...


Awesome thanks for the info. I'm probably sticking to one for now since I don't think the h500m case I'll be using could aesthetically fit two and all the other stuff.


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post #6 of 61 (permalink) Old 04-26-2019, 06:37 PM
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I like shutting my computer off when not in use. It all depends on your preference. If a leak happens you may spot it and shut the computer off. If a pump fails you can catch it quick enough. You also save on electricity.

On 24/7, if a leak happens... However, if a pump fails on idle the computer should not overheat to the point of component failure. If for some reason it does hopefully the mobo/CPU will just shut off the computer anyway.

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post #7 of 61 (permalink) Old 04-26-2019, 08:35 PM - Thread Starter
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Quote: Originally Posted by Gunderman456 View Post
I like shutting my computer off when not in use. It all depends on your preference. If a leak happens you may spot it and shut the computer off. If a pump fails you can catch it quick enough. You also save on electricity.

On 24/7, if a leak happens... However, if a pump fails on idle the computer should not overheat to the point of component failure. If for some reason it does hopefully the mobo/CPU will just shut off the computer anyway.
Thanks for the feedback. Yeah I might transition to putting the system in standby/etc. when not in use. I used to never do it because I wanted quick access and older OS's and mechanical drives/etc used to take "forever" to start up. On top of that I had fan bearings in case fans get dirty/worn and if you shut them off it would be noisy/grindy when first turned on. Now my 4.5 year old 4790K with a SATA based Samsung 850 drive can resume standby in just a few seconds. Not much longer than my monitors take to wake up. I had also always heard it was better for wear & tear to just leave things on instead of constantly hitting them with warming/cooling cycles like that.

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post #8 of 61 (permalink) Old 04-26-2019, 08:54 PM
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For the past few years my custom dual loop workstation runs 24/7 with the exception of sleep mode overnight every 2-3 days and even then a lot of times it runs literately 24/7 non stop. I only reboot my system once every 2-3 months and the 4xD5 pumps are about 3-4 years old and no sign of wearing down

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post #9 of 61 (permalink) Old 04-26-2019, 09:13 PM
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According to the data sheet, the D5 has an expected life of 50,000hrs @ 60C water temp. Assuming you keep your water temps in check and your water clean, you should get ~5.7 years of 24/7 use.

But as others have mentioned, leaks happen.

I personally have run a Laing DDC 1T for about 4-5 years 24/7, 3 of which I was folding in an ITX loop. Pretty sure my water temps where near or above the recommended water limit. It only recently started to show signs of issues and that was mostly it just getting noisy. I must mention I was using a Swiftech block Apogee Drive II (pump on cpu block). You are not suppose to mount pumps with the impeller facing down , I did, so likely the early demise of my pump if I'm honesty.

My PC was unsupervised for 3 months one summer while I was away from my apartment/school for work. Never had an issue. I Like to live dangerously I suppose



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post #10 of 61 (permalink) Old 04-27-2019, 06:50 PM - Thread Starter
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Quote: Originally Posted by animal0307 View Post
According to the data sheet, the D5 has an expected life of 50,000hrs @ 60C water temp. Assuming you keep your water temps in check and your water clean, you should get ~5.7 years of 24/7 use.

But as others have mentioned, leaks happen.

I personally have run a Laing DDC 1T for about 4-5 years 24/7, 3 of which I was folding in an ITX loop. Pretty sure my water temps where near or above the recommended water limit. It only recently started to show signs of issues and that was mostly it just getting noisy. I must mention I was using a Swiftech block Apogee Drive II (pump on cpu block). You are not suppose to mount pumps with the impeller facing down , I did, so likely the early demise of my pump if I'm honesty.

My PC was unsupervised for 3 months one summer while I was away from my apartment/school for work. Never had an issue. I Like to live dangerously I suppose
Thanks again for the replies everyone, as a noob to watercooling I really appreciate it Good to know on the pump life. Maybe eventually I'll have room for a backup pump, but the H500M while roomy overall I think would be a tight fit unless I dumped the drive cage and put it down there, but I'll be putting a 4TB spinner down there in the build so I can't get rid of it. Guess I'll just have to say after a few years if I haven't found something to "upgrade" the pump to just swap it out to something else and replace it or something if I don't have a backup by then. Definitely a bit different than air coolers like my D14 that I've used in 3 builds over 10 years lol (with the original fans even).

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