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DO NOT use XSPC res tops with your Swiftech pumps...

post #1 of 80
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Guys, after 1 year and 3 pumps, I can tell you that the MCP355 is not designed to last with any res top for that matter. I just got done talking to a Swiftech representative in their support department and he said "pumps are dying left and right due to the XSPC res top."

I am curious how accurate his statement is though. Is it that the res top is making the pump work at a faster rate than it was designed for so it generates excessive heat and thereby killing itself?
I'm pretty pissed because people were adament on the XSPC res top giving performance but never mention failure rates. I've advised a lot of people to do the same even. I won't be recommending that route anymore. I'm currently looking for a cheap out of water pump solution so I don't have to buy an $80 (overpriced) pump each time it goes bad.




Lesson: Don't use the xspc res top with the mcp355. Swiftech says there is a rise in these incidents and they're not covering anything, which is fair but people need to stop recommending this setup if it leads to eventual failure.
Edited by Vbp6us - 1/11/11 at 5:06pm
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post #2 of 80
I've had mine running for about 2 months now with no signs of degration at all. Can you please show us a picture of the bottom of your pump? I'd like to see how it was mounted.

I just can't believe the increased failure rate is due to the reservoir top, it simply wouldn't make sense.

EDIT: It could be because your loop is so unrestrictive that it works the pump harder than what it was designed for. I would try either reducing pump power or adding some more restriction to that loop. As it is you are pushing 2.5+ GPM through that loop due to your CPU block adding virtually no restriction.
Edited by charliehorse55 - 1/11/11 at 5:23pm
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post #3 of 80
these pumps run hot plain and simple. I would be willing to bet the failure is actually do to some cost cutting use of components that cant take the heat. I personally have mine mounted on an aluminum block that acts as a heatsink because I was reading temps in the 80's on the back of the pump.
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post #4 of 80
Thread Starter 
Quote:
Originally Posted by charliehorse55 View Post
I've had mine running for about 2 months now with no signs of degration at all. Can you please show us a picture of the bottom of your pump? I'd like to see how it was mounted.

I just can't believe the increased failure rate is due to the reservoir top, it simply wouldn't make sense.

EDIT: It could be because your loop is so unrestrictive that it works the pump harder than what it was designed for. I would try either reducing pump power or adding some more restriction to that loop. As it is you are pushing 2.5+ GPM through that loop due to your CPU block adding virtually no restriction.
Here is my setup:



I was getting at that in my original post as well. I think the faster flow is leading to overheating but not sure though since one of my pumps died without a res top. My updated specs are in my signature.
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post #5 of 80
Can you please take a close up shot of the bottom of the pump? It almost looks like the middle of the pump has been covered with rubber.
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post #6 of 80
i used a res top for a year then traded for a non res xspc top cause i wanted something new... 2 yrs later pump is fine. And mine is just stuck to the case with the double sided sticky foam block thing so im ganna say its not the tops fault. 88evga has been using my res top since we traded and is still using it to this day.
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post #7 of 80
doesn't the xspc top provide less restriction than the stock top? it sounds like swiftech is passing the buck, typical customer service
post #8 of 80
you're doing something wrong. Mine has the xspc top on it and has been mounted on the foam block that comes with it for months upon months with nothing gone awry
 
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post #9 of 80
Sorry to hear about your troubles. I know it sounds bad but there aren't many companies who cover modded components under warranty, it's just a fact of life. XSPC is your only hope to get compensated IF you can prove their top caused the failures, and that isn't going to be easy, even if its true.

You are taking the responsible route by warning others they won't be covered under warranty and not recommending the res again until there is proof otherwise. It wouldn't be right to bad-mouth either company without all the facts, so I applaud your stance. The logical step is for XSPC to conduct a barrage of tests and work with Swiftech on a solution. One blaming the other won't help.

It would be nice to hear from other users but without pump serial numbers it won't mean much.
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post #10 of 80
Something doesn't make sense here.

If the pump is burning out prematurely, I'm failing to see how the pump top could be the cause of it. If anything, replacing the top with one that has less restriction should have the opposite effect that Swiftech is claiming. The pump would now not have to work as hard to draw in water from the reservoir, meaning the pump should run cooler.

Additionally, there's no directly link between the impeller and the electronics that drive the impeller (they're magnetically linked). One would think that the ceramic bearing would wear out well before the electronics of the pump would fail (if the problem was that the impeller was spinning too fast). Given that the pump's magnetic drive runs at a constant speed and is physically disconnected from the rest of the pump, if the rotor was out-spinning the magnetic field that's driving it (highly unlikely), it wouldn't be able to "push" the magnetic drive. If it did, it would most likely induce a back-current back into the magnetic coil. If you had a multi-pump setup I could possibly see that happening, but in a single pump setup it's not going to happen.

What this sounds like to me is either:

a) Swiftech had a bad batch of MCP355 pumps and they're using the replacement pump top as an excuse not to warranty them.

b) As others have said, the pump is known to run hot, so there's insufficient cooling of the pump (causing the failure). Given that Koolance specifically makes a heatsink to cool the MCP355 series, I'm more given to believe that the pump is overheating and causing the failure. http://www.frozencpu.com/products/11...c107s156#blank

c) An installation error (ex: Not mounting the back of the pump flush against the bottom of the case) so that the pump is cooled by conduction.

d) The person you talked to from Swiftech didn't actually know what was going on and just used the pump top as an excuse to get you off of the phone and deny your warranty replacement.

Since Swiftech is the one making the claim that the replacement top is causing the failure of the pump, the burden of proof is on them to prove that. What they're suggesting is almost like a car dealer denying your warranty because you changed your tires from Michelin's to Yokohamas, and your engine broke a rod.
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