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24 volts into MCP655 Pump

post #1 of 6
Thread Starter 
Has anyone tried applying a higher voltage to the MCP655 pump? The reason I ask is because the specs of the pump say it's a 24v pump. I'd like to add a separate power source in my rig if I could increase the pump's output and performance.
    
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post #2 of 6
Yes, it adds very little to the performance.

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Kusanagi
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post #3 of 6
Thread Starter 
Wow! That"a terrible gain.
I added second pump to my loop but the amount of flow still seems low to me. And too, I only have a AX860 PSU running two GTX680s and my over-clocks. I'm a bit concerned that I may be reaching the limits of the PSU. I think my restriction problems are because of the XSPC water blocks and CPU block. But I also have a question about the Bitspower anti-cyclone fitting in the Rez. Are these things known to cause issues?
    
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post #4 of 6
What do you mean by low flow? If you're running only three waterblocks (two of which GPU), a single MCP655 should be plenty capable of pushing enough water!
   
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post #5 of 6
Quote:
Originally Posted by Wasupwitdat1 View Post

Wow! That"a terrible gain.
I added second pump to my loop but the amount of flow still seems low to me. And too, I only have a AX860 PSU running two GTX680s and my over-clocks. I'm a bit concerned that I may be reaching the limits of the PSU. I think my restriction problems are because of the XSPC water blocks and CPU block. But I also have a question about the Bitspower anti-cyclone fitting in the Rez. Are these things known to cause issues?

I never use the original fitting that comes with the BP res's, and I use a lot of BP res's..

Here's a copy paste from my M 'n M Twins build log about that.


Here's an important detail; The Bitspower reseviors and watertanks come stock with a tiny little excuse of an anti siphon fitting. 3 Tiny little frickin' holes for the pump(s) to suck all you flow thru.

*** were they thinking!

Always order the large size anti siphon fitting, that one large hole has several times the cross sectional area of the 3 tiny ones combined:





Darlene


Another possible thing to consider, depending on what fittings you have throughout your build, is that some brands have a very small diameter bore in their rotaries and angles, about 5mm, and if you somehow have one in your loop, it hurts a lot.

I don't recall which brand it was, but I have some in my misc. box.

That's at least one reason why I try to stay with BP exclusively.
post #6 of 6
Thread Starter 
Thankx a lot. I'll have to get one of those anti-syphon fittings. All the fittings in the build so far are BP. I'm starting to feel more comfortable with the flow I'm getting now that the air has escaped. It's been about 24 hours since the last refill of the system. I drained it because I added the second pump. Sad thing is I'll have to drain the loop again once the pump dress kit and pump top arrive. Who knows when that will be because the parts weren't in stock at the time of ordering but in the mean time I'll go ahead and get that fitting so I'll have it ready.



Opps! The quick disconnect is not BP. The build still has a way to go before it's complete so don't pick, or do if you have a suggestion.
Edited by Wasupwitdat1 - 6/28/13 at 12:48pm
    
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