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swiftech MCP355 gettin hot - Page 2

post #11 of 13
I'm a complete layman when it comes to watercooling but after reading the information GingerJohn posted and linked to, I came to the conclusion that the pump heating up is normal in my case. I believe my loop is relatively low restriction (res -> pump -> 360 rad -> EK Supreme HF -> res) and the default top of the MCP35X is quite high performance, I believe, so the liquid flows pretty freely when running full power. And from what I understand, that makes the pump draw more power and heat itself up.

I think the pump operates normally, aside from the heat generation and fair amount of vibration. I haven't opened it up yet for inspection, mainly because I don't know what I should be looking for but also for the fact that I can't afford to lose the warranty, in case the pump happens to fail.

I quite recently redid the tubing (previously some of the tubes were far too long) and now the pump is sitting (or standing, on the feet of the Swiftech heatsink) on two layers of sound dampening mat as an attempt to absorb the vibrations. Seems to work quite nicely.
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post #12 of 13
Quote:
Originally Posted by nostalgia View Post
I believe my loop is relatively low restriction (res -> pump -> 360 rad -> EK Supreme HF -> res) and the default top of the MCP35X is quite high performance, I believe, so the liquid flows pretty freely when running full power. And from what I understand, that makes the pump draw more power and heat itself up.
That is correct. The 35x is overkill for your loop but will give you plenty of expanability in the future. It is also PWM, meaning you can easily control it's speed from any PWM enabled fan header on your motherboard.

If you can I would try using that method to control the speed of the pump. Try seeing if dropping the power has any effect on temps, if not run it at the lower power. It might even help your loop due to the lower heat dump.

Quote:
Originally Posted by nostalgia View Post
the pump is sitting (or standing, on the feet of the Swiftech heatsink) on two layers of sound dampening mat as an attempt to absorb the vibrations. Seems to work quite nicely.
Glad you have found a solution, tuning the pump speed will also help to reduce vibration.

I usually reccomend Petra's Gel Stuff as a sound absorbing material for pumps. Normally you can't use it on the base of the DDC pumps (350/5/x) due to overheating issues, but if you already have it on a stand or heatsink then it is not a problem. Worth considering the $5 when you next place an order (other places sell it too).
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post #13 of 13
However, if your pump is vibrating a lot maybe its out of balance and needs to be RMA'd. I have to pinch my pump pretty hard to feel its 'vibes' and its bolted right to the floor of my acrylic case, or maybe its a by product of having it attached to a pad and not metal/plastic.
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