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MCP355 vs MCP655

post #1 of 7
Thread Starter 
Hey guys, I've been comparing pumps and I've kind of been looking mainly between the Swiftech MCP355 and the MCP655 Special Edition for my loop that I'm currently planning.

Here's what I take away from what I've seen so far:
-The 655 costs $30 more than the 355
-The 355 has more head than the 655
-The 655 is quieter than the 355

Now if I'm planning a loop that will have a CPU and a GPU as well as the basics (rad, res, pump) does the extra 7 ft of head on the 355 make much of a difference? Also, does anybody know from experience how loud a 355 actually is? Apparently is a louder pump compared to others. Any help would be appreciated and if you have suggestions of another pump not listed, link me and I'll check it out. Thanks!
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post #2 of 7
This is worth checking out. I'd actually recommend the 35X but the 655 would be fine for your loop.

Edit: I knew they were around somewhere but there's links to the noise test videos (and loads of other useful stuff) at here
Edited by Big Elf - 7/8/13 at 8:26am
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post #3 of 7
Size is another consideration - the 355 / 35x is considerably smaller than the 655.

Note that the stock top on the 355 has 3/8" barbs and the 655 has 1/2" barbs - if you plan to use a different size tubing or want nice looking fittings you will need to consider a pump top for both (and void your warranty in the process). An after market pump top also increases the performance of both pumps.

The 35x on the other hand comes with G1/4 threaded ports as stock, so you can attach your own fittings.
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post #4 of 7
D5 vs DDC
- Both have different top options; the D5 is more easily changed post-purchase
- Both have models that include a tach wire (model specific)
- Both have models that include a PWM circuit (model specific)
- The D5 offers variable resistor models
- The D5 favors medium/high-flow, low/medium-restriction, the DDC favors medium-flow, medium/high-restriction
- The D5 is water cooled, the DDC is air cooled (sometimes requiring HSF to prevent overheat)
- The D5 has a longer lifespan expectancy than the DDC, but both are very solid
- The D5 is significantly larger in size than the DDC
- The D5 has less vibration and noise than the DDC


If silence is of the utmost concern, then D5 is preferred.
If you have a high restriction loop, then multiple D5s or a DDC is preferred.
If available space is the primary concern, then DDC is preferred.
post #5 of 7
Thread Starter 
Quote:
Originally Posted by Electrocutor View Post

D5 vs DDC
- Both have different top options; the D5 is more easily changed post-purchase
- Both have models that include a tach wire (model specific)
- Both have models that include a PWM circuit (model specific)
- The D5 offers variable resistor models
- The D5 favors medium/high-flow, low/medium-restriction, the DDC favors medium-flow, medium/high-restriction
- The D5 is water cooled, the DDC is air cooled (sometimes requiring HSF to prevent overheat)
- The D5 has a longer lifespan expectancy than the DDC, but both are very solid
- The D5 is significantly larger in size than the DDC
- The D5 has less vibration and noise than the DDC


If silence is of the utmost concern, then D5 is preferred.
If you have a high restriction loop, then multiple D5s or a DDC is preferred.
If available space is the primary concern, then DDC is preferred.
So it appears that a D5 is a better all around pump, so I'm kind of leaning towards the MCP655. Any other thoughts?

+Rep for the info!
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post #6 of 7
If you have the money go for the pwm version of the 655 or the 35x
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post #7 of 7
I use mcp 355.. I dont hear them over my fans. My system has been running 24/7 for about two years now on the same pumps. I change the water once a year or when i change cpus and motherboards.
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