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Which pump is the most quiet: MCP655, MCP35X or MCP35X2 ?

post #1 of 20
Thread Starter 
Which of these pumps would give the quietest setup for use with one 360 rad, one CPU 3930K and one GTX570
when you aim for 1 GPM flow:
+ MCP 655
+ MCP35X
+ MCP35X2

The MCP35X has off course the benefit that you can make it run faster depending on temps rising but is this really necessary if you can regulate your fans to compensate the temp rise ?

Anybody have any experience with these pumps compared ?
post #2 of 20
MCP655. Runs cooler, and will likely last longer. Mine is going strong for more than 7 years now. Put it on some sort of anti-vibration pad, and it will be silent in a normal case.

MCP35X2 is way overkill.

But really, either the MCP655 or 35x will be fine for that loop. It just comes down to your personal preference/needs. The 35x is much smaller than the 655, so it can fit in smaller areas.
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post #3 of 20
Quote:
Originally Posted by Tsumi View Post

MCP655. Runs cooler, and will likely last longer. Mine is going strong for more than 7 years now. Put it on some sort of anti-vibration pad, and it will be silent in a normal case.
MCP35X2 is way overkill.
But really, either the MCP655 or 35x will be fine for that loop. It just comes down to your personal preference/needs. The 35x is much smaller than the 655, so it can fit in smaller areas.

Considering most people auto replace the top on a D5, I'd recommend a diff make as to not insta void your warranty, alphacool koolance etc.

I love me some 35x though. It's a bit more pump than a 655 and a bit more flexible and it doesn't need a top and will bolt to any standard G1/4 res.
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post #4 of 20
i have the 35x and i can barely hear it. actually the loudest part of my setup is the noise of the water bouncing around in my res. makes me want to go pee sometimes LOL
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post #5 of 20
Quote:
Originally Posted by tsm106 View Post

Considering most people auto replace the top on a D5, I'd recommend a diff make as to not insta void your warranty, alphacool koolance etc.
I love me some 35x though. It's a bit more pump than a 655 and a bit more flexible and it doesn't need a top and will bolt to any standard G1/4 res.

People don't automatically replace the top on a D5... the stock top is good enough that aftermarket tops net barely any performance improvements. The only reasons to replace it is if you want to place compression fittings on it, use not 1/2" ID tubing, and aesthetics.

The DDC is the one you're thinking of that people automatically replace, which is the 355.

I highly doubt that changing tops voids warranty. There are no warranty stickers on there. It's like changing the heatsink on a graphics card.
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post #6 of 20
Like everyone else said down to personal preference. The 35x is smaller tho and the 655 is a bit bigger. I have experience using the 35x and I can say it runs quiet. All comes down to what you want / need smile.gif.
post #7 of 20
7/16" tubing should fit on the 1/2" barbs of the MCP655, no?
post #8 of 20
Quote:
Originally Posted by Tsumi View Post

People don't automatically replace the top on a D5... the stock top is good enough that aftermarket tops net barely any performance improvements. The only reasons to replace it is if you want to place compression fittings on it, use not 1/2" ID tubing, and aesthetics.
The DDC is the one you're thinking of that people automatically replace, which is the 355.
I highly doubt that changing tops voids warranty. There are no warranty stickers on there. It's like changing the heatsink on a graphics card.

It's ironic that you wrote that and you've never visited swiftechs product page.
Quote:
WARNING - CUSTOM TOP VOIDS WARRENTY
Nader Shehata (Miami, FL) 9/19/2011 11:41 PM
WARNING - CUSTOM TOP VOIDS WARRENTY my brand new pump died after a few hours of use and because i used a custom top(XSPC Dual 5.25" Bay Reservoir ) , swiftech would'nt warrenty it and i lost $104
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post #9 of 20
I have a ddc(mcp355) 18w version, mounted on a kitchen sponge cut to size, an then squised down to near 3/8". I never hear it, and I use an open bench.
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post #10 of 20
The mcp655 is the quietest out of the three but I can barely hear my two ddcs unless I put my ear right next to em. If you decouple the pump from the case with foam or some other isolator the pumps won't make much noise even compared to quiet fans.
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