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  #51 (permalink)  
Old October 23, 2007, 08:59 AM
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Get an aftermarket top for the 355, like the Alphacool.

Those allow you to use any barbs, and because of the option to put the inlet at the top over the impeller, (stock top does a 90-degree turn onto the impeller) and make the pump quieter too (Delrin tops however, seem to make the pump louder).
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  #52 (permalink)  
Old October 23, 2007, 12:03 PM
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Quote:
Originally Posted by YugenM View Post
Get an aftermarket top for the 355, like the Alphacool.

Those allow you to use any barbs, and because of the option to put the inlet at the top over the impeller, (stock top does a 90-degree turn onto the impeller) and make the pump quieter too (Delrin tops however, seem to make the pump louder).
Yup i thought of that, but if he puts an after market to the barbs wont be on one side of the pump anymore.
One will be on top and one at the side. There for he might as well get a 655 pump.

If you go that way go with the petra's top.
http://www.ncix.com/products/index.p...=Petra%27sTech
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  #53 (permalink)  
Old October 23, 2007, 01:13 PM
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ok I am actually starting to wonder which pump is better because the MCP355™ 12 VDC Pump has 20' of head ( high lighted in bold)

* Small Footprint: 2.4" x 2.4" x 1.5"
* 50,000 hours MTBF (Mean Time Between Failure) equivalent to 5 years lifetime.
* Superior 12 Volts DC convenience: plugs into the computer power supply
* The MCP355™ can be used with full confidence in any MP servers, and high-end workstations.
* Superior real world performance thanks to its high pressure characteristics (20ft of head). The MCP355™ is particularly well adapted to the proliferation of daisy-chained liquid cooling devices in a single circuit: Multiple Processors, Chipset, Graphics, and Hard Drives.
* 3/8" barb fittings.
* No maintenance when used with de-mineralized water, and anti-fungal additives (Our HydrX™ additive is recommended)
* Quick installation with adhesive neoprene pad, or permanent installation with screws and grommets.
* RPM sensor plugs to 3 pin motherboard fan connectors and reports impeller rotational speed



And The MCP655™ pump has only 10" head ( high lighted in bold) this confuses me because I thought that the 655 pump was better but then I read that the higher the head the better the pump. so what gives lol

Nominal voltage 12 V DC

Operating voltage range 8 to 24 VDC

Nominal power (@ 12 V)24 W
Nominal current (@ 12 V) 2 amps

Motor type Brushless, microprocessor controlled

Maximum head 10 ft (3.1 m)

Maximum discharge ~ 317 GPH (1200 LPH)

Connection size " barbs
Maximum pressure 50 PSI (3.5 BAR)
Temperature range 32 F to 140F (0 C to 60 C)

Electrical connector Molex 4 pin

Weight 1.4 LB (650 gr.)

Last edited by Shadowmeph; October 23, 2007 at 01:17 PM.
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  #54 (permalink)  
Old October 23, 2007, 01:50 PM
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The MCP355 is at LEAST equal to the MCP655 in real work performance without a custom top. If you put a custom top on it, then it's better.
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Old October 23, 2007, 01:53 PM
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I'm not an expert by any means, but if I had to guess I'd say the difference in head pressure was due to the ID of the tubing they support. That extra 1/8 ID adds a substantial amount of water in the loop to be pushing around.

Quote:
The MCP355 is at LEAST equal to the MCP655 in real work performance without a custom top. If you put a custom top on it, then it's better.
Really???? And in such a small package???

Wish I had done a bit more research before picking up the 665 then...... (I wanted 1/2" though so that's ok... :) ).
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Last edited by sswilson; October 23, 2007 at 01:55 PM.
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  #56 (permalink)  
Old October 23, 2007, 07:19 PM
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Quote:
Originally Posted by Apollo4g View Post
Yup i thought of that, but if he puts an after market to the barbs wont be on one side of the pump anymore.
One will be on top and one at the side. There for he might as well get a 655 pump.

If you go that way go with the petra's top.
http://www.ncix.com/products/index.p...=Petra%27sTech

The Alphacool top has another inlet where the stock one would be, so he can keep the small form factor of the pump (and the inlet and outlet both being on the side), while having a quiet(er) pump.

Alternatively, he can reduce the noise by a fair bit if he loosens up the screws on the bottom of the pump by about 1/16~1/8 of a turn
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