mcp355 temperature

Hannibal Lecter · 11-11-2009, 03:25 AM

I am setting up a a second loop (GPU) and I have noticed that my MCP355 is quite hot to the touch. It has been working flawlessly 24/7 for 10 months now and I never paid any attention to its temperature.

I stuck a temp sensor to the bottom of it and my aquaero gives a reading of 56C. Isn't it quite high?

There is a lot of space below the pump but not much airflow. What temperature level is considered "normal" for this pump?

Thanks for any info on this guys

nkresho · 11-11-2009, 04:45 AM

Hot to the touch is normal with them. I've seen some guys with heatsinks on the bottoms. http://forums.vr-zone.com/overclocki...-heatsink.html

I have mine mounted directly above my radiator, so they aren't all that warm. I would recommend getting a bit of air flow to them if at all possible. Plastic isn't the best conductor of heat, so I would imagine if you're getting 56c on the plastic casing, it's a good deal hotter inside.

Try to get the pumps off the floor of your case if you can. Maybe try an undesigns mount or fab up something to allow some air to get to the underside.

Hannibal Lecter · 11-11-2009, 05:01 AM

Thanks. The pump is actually off the floor. With a little airflow the temp goes down about 7C to around 49C. Isn't this still high?

I should mention that ambient temp is about 26C.

nkresho · 11-11-2009, 05:35 AM

I'm not 100% sure if that's within the range of what's acceptable. I don't have a probe that will measure mine.

I can say though, that mine are cool enough to keep my finger on there (any place on the bottom) without removing it.

Maybe it's restriction in your loop? Are both of your pumps equally hot? I would imagine more restriction might lead to more heat. If one's hotter than the other it might point to a problem.

Are you sure you're getting 12 volts to them? I know some equipment tends to run hotter when undervolted??? I don't know, just reaching for ideas now???

I have a full cover gtx285 block, mcr220, and a nb/sb5 on my one loop; and a hk3.0 with a mcr320 in the other. Each is powered by a mcp355 mounted in the xspc dual ddc reservoir. And the pumps are equally warm to the touch.

Hannibal Lecter · 11-11-2009, 05:52 AM

I don't know whether the second MCP355 is as hot or not. I am just starting to build the second loop. I found out about the first pump high temp while planning for the second loop.

Maybe there is nothing to worry about. I just wanted to know from others with the same pump if that pump was overheating for some reason.

NaeKuh · 11-11-2009, 09:36 AM

Quote:

Originally Posted by nkresho

Hot to the touch is normal with them. I've seen some guys with heatsinks on the bottoms. http://forums.vr-zone.com/overclocki...-heatsink.html

mines better...

been there and done that.. :P

nkresho · 11-11-2009, 10:06 AM

LOL, that's actually the one I had in mind. I just found the other googling quickly. Yours does look way better.

Zeus · 11-11-2009, 10:27 AM

Mine is cool to the touch. I have a feeling restriction of your loop is correlated to the temp of the pump.

Back when i had a more restrictive loop (Swiftech Storm) it got much hotter. So hot in fact it melted the Petra's silicon pad i had under it.

When i removed the pump i could clearly see the imprint of the pump burned in.

Now, 3 years later it's still going strong.

*knocks on wood*

Salamndar · 11-11-2009, 10:43 AM

Hmm, Mine which I'm replacing soon, runs waaaaaaaaaaaaay too hot to touch, I even made a simple loop withe only the pump + XSPC dualbay res and a tube, after 15 min, the water was very warm.

Hannibal Lecter · 11-11-2009, 11:08 AM

I don't think restriction is an issue here: the loop is just for the CPU (see sig), even with 2 rads, the total restriction must be pretty low. The tubes have no kinks either.

The ambient temp here is a little high though at 26C and with a little airflow the pump temp does go down to 47C.

Still it seem a little high to me or maybe I'm just paranoid

. It would be great if one of you guys could check his/her MCP 355 temp.

Salamndar · 11-11-2009, 11:15 AM

I'm thinking of attaching a 40mm fan on the buttom of the MCP355!

MadHacker · 11-11-2009, 11:42 AM

I guess for the true extreme user you should watercool the pump.

Jah · 11-11-2009, 12:49 PM

Quote:

Originally Posted by Salamndar

Hmm, Mine which I'm replacing soon, runs waaaaaaaaaaaaay too hot to touch, I even made a simple loop withe only the pump + XSPC dualbay res and a tube, after 15 min, the water was very warm.

That is what happens when you take a loop and dumps ~18W of heat, from the pump, in to it without a radiator to dissipate it

Hannibal Lecter · 11-11-2009, 01:26 PM

I guess the MCP 355 does run hot, so I am going to set up the two pumps on the second loop radiator. that way:

That should take care of the problem

NaeKuh · 11-11-2009, 02:03 PM

Quote:

Originally Posted by Hannibal Lecter

I guess the MCP 355 does run hot, so I am going to set up the two pumps on the second loop radiator. that way:

That should take care of the problem

2.4 inches = 60.96 millimeters

is that to scale?

Also your blocking the exhaust to your fan... you really want to do that?

Hannibal Lecter · 11-11-2009, 03:00 PM

Each pump is 62mm and this should be to scale (at least for the pumps and fan). I drew this to see whether it could be done. I used the outer measurement for the RX120 (being shipped to me). The two pumps will be on rubber bolts that I have and will seat about 23mm above the fan in a push/pull setup. So there shouldn't be any problem... I think

. It will look something like that:

Waterlogged · 11-12-2009, 11:17 PM

Quote:

Originally Posted by Zeus

Mine is cool to the touch. I have a feeling restriction of your loop is correlated to the temp of the pump.

Back when i had a more restrictive loop (Swiftech Storm) it got much hotter. So hot in fact it melted the Petra's silicon pad i had under it.

When i removed the pump i could clearly see the imprint of the pump burned in.

Now, 3 years later it's still going strong.

*knocks on wood*

+1, but, I think it might actually be the other way around. The DDC's I have been both very warm and very cool to the touch while sitting on sound absorbing wadding. I had both very warm and very cool in one build with different tube routing with the same exact pump (DDC3.2). I was using PUR tubing, which is rather stiff, and necessitated the use of 4 "less than optimally" designed 90's and the pump ran cooler on that loop than on another that had only 2 45's in it. Everything else in that case was the same except the loop routing.

Quote:

Originally Posted by Salamndar

I'm thinking of attaching a 40mm fan on the buttom of the MCP355!

60mm fits a bit better.