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post #11 of 61 (permalink) Old 04-27-2019, 07:10 PM
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D5 is a pretty simple design, I would imagine one would run pretty much indefinitely as long as you don't run it dry.

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post #12 of 61 (permalink) Old 04-30-2019, 08:30 PM
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Laing D5 and DDC pumps run well past their rated hours of life....only issue with DDC is cooked mainly at the bottom with the PCB, so 18 watts units can get hotter than a 10-12 watt unit, which those barely get hot. D5 is cooled from the coolant, as it has the metal inner that contacts the coolant. I wouldn’t trust any other pump other than a D5 or DDC for longevity at this point. Lots of Chinese clones out there, but I don’t trust them.


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post #13 of 61 (permalink) Old 04-30-2019, 10:26 PM
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I've been using my DDC (MCP35X) for 5-6 years although at about 60% of max speed and has always had air running through its heatsink. It runs 24/7 for majority of the year except for when I'm out on vacation or business travel. As others have mentioned, as long as you stick with a genuine D5 or DDC pump, it will last through the rated lifetime.

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post #14 of 61 (permalink) Old 05-01-2019, 12:29 AM
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Quote: Originally Posted by Gunderman456 View Post
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.
You can connect the rpm report cable of some pumps to the cpu fan header on the motherboard and change settings in bios to shutdown the computer if the cpu fan rpm drops below a certain threshold. I had mine set up like that for a long time and never had any issues. If my pumps stopped the system would gracefully shutdown. Having two pumps also helps with that issue, it's unlikely both pumps will fail at the same time.
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post #15 of 61 (permalink) Old 05-01-2019, 08:11 AM
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Quote: Originally Posted by anti-clockwize View Post
You can connect the rpm report cable of some pumps to the cpu fan header on the motherboard and change settings in bios to shutdown the computer if the cpu fan rpm drops below a certain threshold. I had mine set up like that for a long time and never had any issues. If my pumps stopped the system would gracefully shutdown. Having two pumps also helps with that issue, it's unlikely both pumps will fail at the same time.
Good to know that thanks. I don't think my pump has that cable. Depending on your build also, I imagine that cable is very long as well since for instance my solo pump sits at the bottom of the case.

Should PC hardware companies regain their senses, I can't wait to build a new system and see and experience, in detail, where hardware is at.

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post #16 of 61 (permalink) Old 05-01-2019, 10:33 AM
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Quote: Originally Posted by ezveedub View Post
Laing D5 and DDC pumps run well past their rated hours of life....only issue with DDC is cooked mainly at the bottom with the PCB, so 18 watts units can get hotter than a 10-12 watt unit, which those barely get hot. D5 is cooled from the coolant, as it has the metal inner that contacts the coolant. I wouldn’t trust any other pump other than a D5 or DDC for longevity at this point. Lots of Chinese clones out there, but I don’t trust them.


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I tend to disagree.
Installed yesterday my first D5 pump Watercool D5 Vario, but before i was using a EHEIM 1046, 24/7 (220V) directly connected to electricity, for more than 12 years even with PC OFF.

Please don`t put a D5 on same level of reliability as a EHEIM pump.
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post #17 of 61 (permalink) Old 05-01-2019, 05:30 PM
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Quote: Originally Posted by Mordorr View Post
I tend to disagree.
Installed yesterday my first D5 pump Watercool D5 Vario, but before i was using a EHEIM 1046, 24/7 (220V) directly connected to electricity, for more than 12 years even with PC OFF.

Please don`t put a D5 on same level of reliability as a EHEIM pump.
That pump isn't a standard PC water cooling pump. There are tons on pumps in the aquarium world but the D5 and DDC lines have been adopted by PC enthusiasts and there are after market parts tailored to PC cooling. When you artificially limit your scope to PC specific water pumps the D5 and DDC's are the way to go.


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post #18 of 61 (permalink) Old 05-01-2019, 05:46 PM
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no issues,

I'm sure its already been said, but for long term use i'd highly recommend Mayhem's biocide+ and inhibitor+ drops(both bottles), then follow the directions. It's the cheapest and cleanest solution for long term use. If you don't take that advice, than at least use Mayhem's X1 clear/UV line. (the other top shelf guys just rebottle his stuff these days)

if you really wanna take it to the next level for longevity & system health, so your blocks come out YEARS later looking brand new - get his blitz kit (both parts 1 & 2, like the drops mentioned above) & follow the directions, with a liberal rinse cycle.

Buy distilled by the 6 gallon pack, they'll be ~$5-$10 a pack, depending on your location.

don't over analyse things, or mince over the 1-2%s.

Also if you don't care about looks, you can save an ishton of money buy going barbs & worm clamps (the most secure solution, specially for soft tubing & long term use), thus giving you more money for a better pump, or PC components. Only you and some other bruhs online are gonna see it, n your girl really isn't gonna care if you have barbs, compressions, LEDs that bump to the beat, etc... (LEDs are distracting overpriced fad to bring in new customers!!!)

last bit of advice, Aquaero 6 is the best investment ever, n don't even get the one with the screen, just get the board, so you can stash it wherever best fits a central location for wiring.

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post #19 of 61 (permalink) Old 05-01-2019, 07:20 PM
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Quote: Originally Posted by Mordorr View Post
I tend to disagree.
Installed yesterday my first D5 pump Watercool D5 Vario, but before i was using a EHEIM 1046, 24/7 (220V) directly connected to electricity, for more than 12 years even with PC OFF.

Please don`t put a D5 on same level of reliability as a EHEIM pump.
I have only had excellent experiences with EHEIM pumps. I have had two 1046 models (12V) and recently got a 1262 (120V) which I never turn off, it doesn't even have a switch. They have all been great, quite and super long lasting. I have not had one die yet. Alphacool has some good accessories targeting water cooling PCs with them as well. EHEIM are definitely my favorite water cooling pumps, especially for 24/7 usage. I had a DDC before getting the first 1046 but it broke after 5-6 years (stopped turning on). I wouldn't recommend DDC for 24/7 use, you want a pump that cools itself with the fluid. My first 1046 is almost 10 years old now and still going strong.

The 1262 is a beast, up to 3400 l/h. It is huge and pulls a crazy amounts of power for a PC water cooling pump but it is still amazing.

I always use pure distilled water with a silver coil in it, and a pure copper/brass loop. The silver coils are cheap and do not get used up and distilled water is cheaper, easier, and works better than anything else, also spills are a non-issue. I have never had any problems and I don't do regular maintenance outside of changing parts (which has never been longer than two years).

Last edited by Asmodian; 05-01-2019 at 07:25 PM.
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post #20 of 61 (permalink) Old 05-01-2019, 10:37 PM
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Definitely D5 pump. Been using mine almost every day for the last 6-7 years and it is still going strong. They are champions. They are often re-branded, so whichever brand of them you get, just find the cheapest with best warranty. They all have the same manufacturer.

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