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MCP350 heating coolant?

post #1 of 6
Thread Starter 
So it appears the MCP350 on the bottom of my Swiftech rad 220 is heating up my coolant...
I just saw on Swiftech site a heatsink made to mount below pump

http://www.swiftech.com/MCP35X-HS.aspx

it can mount 80x80x15 fan...
(Graph on that page is pretty impressive)

Should I try the heatsink/fan combo ?
OR
add another rad (120?)AFTER pump,before GPUS, to further lower coolant temps.?
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mistress
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post #2 of 6
What makes you think it it heating up your water? The heatsink is mainly needed if you have poor airflow. I remember attaching a 120mm fan to mine to keep it from getting too warm.
post #3 of 6
Thread Starter 
the graph indicates stock 50 w/hatsink 40,w fan+heatsink 30-
Water from rad is heated as it passes through pump,no?
So it's pushing hot or warmed water to my GPU's?
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mistress
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Zillagod
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post #4 of 6
MCP35X-HS-Temp.png

That is the temperature of the pump components, nothing to do with the coolant. I'm a bit dissapointed that they did not label the axis or explain the graph - it lacks context.

The heat sink is designed to cool the pump control circuit to help it last longer. When the pump runs at high flow rates, for example if you use an after market top on a low restriction loop, it uses a lot more power (counter intuitive I know, but true). This can lead to pumps burning out relatively quickly.

The pump heat dump into your water is pretty negligable:

It takes 264W to heat water at 1GPM by 1°C

Your pump is using ~20W (MCP355 running at ~1GPM) which will heat the water by a whopping 0.08°C, assuming all the power goes into heating the water. Not worth worrying about.

Edit: A MCP350 uses a lot less power, ~12W at 1GPM = 0.05°C temp rise through the pump.
Edited by GingerJohn - 5/1/12 at 3:55pm
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post #5 of 6
Thread Starter 
+rep~TY
It does say in harsh/warm enviroment.
A/C,72 F hardly counts.
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post #6 of 6
The MCP350 Laing DDC-1T run at 57C under heavy load.

The MCP355 Laing DDC-3.x and the MCP35X run at 100C+ under heavy load.

Even though the 35X offers a great bang for performance and speed control, the heat dump back to the loop is a trade-off.

In many instances where people need good flow in the loop without the extra heat dump, two DDC-1T pumps with or without performance tops still run cooler than a 355/35X, D5, MCP655 pump. thumb.gif
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