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water isn't moving through the loop

post #1 of 18
Thread Starter 
my pump is an MCP355, and using the sensor it says it's running at 4500rpm in the bios, is this normal?
I have an XSPC cpu block and an EK E6750 V2 full cover gpu block, 1x triple rad, and water just isn't moving through the loop very fast at all. the water in the tubing near the CPU block gets very hot and only in that area because the water isn't mixing around due to not moving at all, any ideas? is my pump bust? I tried loosening the screws on the casing a bit incase it was too tight but it just leaked so I don't know what else to do.
post #2 of 18
How long has the loop been set up for? I just had temp issues and my CPU block was clogged.
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post #3 of 18
Thread Starter 
I just rebuilt it for this very reason and i'm still getting the problem. what could be clogging it? I only use de-ionized water and a killcoil (the coil isn't clogging it)
post #4 of 18
Have you got your inlet and outlet right make sure your res
Is feeding into the pumps inlet and not the outlet
post #5 of 18
Thread Starter 
Quote:
Originally Posted by kieran13 View Post

Have you got your inlet and outlet right make sure your res
Is feeding into the pumps inlet and not the outlet

I have a plexi top V2 aftermarket top and the reservoir is on top of the pump feeding into top port, and the outlet is on the side going into the GPU.
post #6 of 18
Thread Starter 
alright I gave up and took the CPU block apart, it was clogged with slimy green gunk. how did that build up with clean water and a killcoil and a few drops of biocide? should I try more biocide?
Edited by paradoxum - 3/3/12 at 1:35pm
post #7 of 18
Probably from the rad, it seems like no mater how well you flush you will always get more gunk out by just running it.
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post #8 of 18
What biocide and tubing are you using? How long was the loop running before?
 
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post #9 of 18
Thread Starter 
it was running for about 6 months since the last time I rebuilt it, the tubing was Feser, and the biocide was pulse modding PHN bioclear.

I replaced the tubing with primochell primoflex pro LRT today because the feser was leeching plasticizer, could the gunk have been plasticizer? the plasticizer was white, though. should I add the biocide to my newly rebuilt loop, or is it possible the biocide caused the buildup AND/OR the plasticizer to come off?

I removed the single 120mm radiator I had in my loop because I thought too much air was getting trapped in it and causing the low flow, so now i'm running with only a triple rad, is that going to be good enough or should I bite the bullet and drain it/rebuild with the 120mm rad added again?

  • I run my i5 at 4.7Ghz / 1.3v and the HD6950 has unlocked shaders and is OC'd to 900mhz / 1875mhz

Edited by paradoxum - 3/3/12 at 1:37pm
post #10 of 18
You should be fine with just the 360 IMO as I'm running a older core 2 quad and a fermi GPU off one 360 and have no temp issues. I have the white stuff in my tubes (havn't had the funds or time to replace it yet) and I still think the gunk in my CPU block was heated plastisizer. Keep an eye on your temps and go from there as it will ultimately be a comfort thing on where your temps are at VS. how much rad you have to cool down your components. Have the flow problems been fixed with all this work?
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