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  1. #1
    Member predator500's Avatar
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    What Pump is Better

    MCP355 OR MCP655 I will be changing the top on the MCP355 to one with 1/2 barb here are the spec for what im using the pump for.
    APOGEE-XT
    MCW30 Universal Chipset Water-block
    77 Bonny Rad
    I have a D4 pump but it seems like it just isnt enough Please help
    Also was thinking of the MCP350 and doing the volt modd

  2. #2
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    better is quite subjective, here are the specs on each, according to performance-pcs, the numbers you should be looking at are flow, head, and noise.

    MCP655
    Code:
    Technical specifications:
    
    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.)
    Impeller Housing material	Noryl
    MCP355
    Code:
    Technical specifications
    
    Nominal voltage	12 V DC
    Operating voltage range	8 to 13.2 VDC
    Minimum starting Voltage	9 VDC
    Nominal power (@ 12 V)	18 W
    Nominal current (@ 12 V)	1.46 amps
    Nominal head (@ 12 V)	20.2 ft (6.1 m)
    Nominal discharge (@ 12 V)	~ 120 GPH (454 LPH)
    Connection size	3/8" barbs (10mm)
    Maximum pressure	22 PSI (1.5 BAR)
    Temperature range	Up to 140F (60C)
    Electrical connector	Molex 4 pin
    Weight	7.3 oz (207 gr.)
    Our noise measurement (non lab environment)	30 ~ 32 dBA in a quiet room @ 2'
    Motor type	Electronically commutated, brushless DC, spherical motor
    Pump MTBF (Mean Time Between Failures)	50,000 Hours
    RPM Sensor	3 pin connector
    D4 - Couldn't find good specs, but someone probably can...
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  3. #3
    Member predator500's Avatar
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    What pump would you recommend aslo if i get the MCP355 here is the top i was looking at for it Laing DDC-1T/1TPlus MCP-350/355 Acrylic Replacement Pump Top

  4. #4
    Member Shell's Avatar
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    I have a related question: What is the most reliable pump?

    I don't need a lot of flow, and noise isn't an issue since you can make a noisy one quiet.
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  5. #5
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    Quote Originally Posted by predator500 View Post
    What pump would you recommend aslo if i get the MCP355 here is the top i was looking at for it Laing DDC-1T/1TPlus MCP-350/355 Acrylic Replacement Pump Top
    Depends, the 355 is better for higher restriction loops, and the 655 is better for lower restriction

    Quote Originally Posted by Shell View Post
    I have a related question: What is the most reliable pump?

    I don't need a lot of flow, and noise isn't an issue since you can make a noisy one quiet.
    sorry, can't help you, might wanna start your own thread and see if someone else can
    If years were seasons, this December would be the December of our December.
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  6. #6
    Retired muddocktor's Avatar
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    That D4 pump you already have is perfectly capable of running that loop efficiently. It's output is more than a MCP655-B; somewhere between the "4" and "5" setting on the MCP655 Vario. I am running a D4 on a cpu only loop with an GTZ wb with a Swiftech MCR220 Res rad. And I also have an MCW30, so I know it won't add much more restriction to the loop over what the XT gives you. What are you trying to cool with the loop? You could possibly need more radiator.

  7. #7
    Member predator500's Avatar
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    Quote Originally Posted by muddocktor View Post
    That D4 pump you already have is perfectly capable of running that loop efficiently. It's output is more than a MCP655-B; somewhere between the "4" and "5" setting on the MCP655 Vario. I am running a D4 on a cpu only loop with an GTZ wb with a Swiftech MCR220 Res rad. And I also have an MCW30, so I know it won't add much more restriction to the loop over what the XT gives you. What are you trying to cool with the loop? You could possibly need more radiator.
    Im cooling Q9550 (OC'ED 4.33)
    The reason im asking about the pump is the with the new water block (the XT )
    the water is going in strong but it is not coming out strong almost like the is not enough head presure to push the water in and out of the block

  8. #8
    Spawn-Inc's Avatar
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    either one will serve more then what your asking. go with which ever one you like and will fit your case better.

    if you go with the 355 then get a EK Xtop - rev2 or the XSPC Res top. but only if you don't have a top currently. if you have one the small performance increase wouldn't be worth it IMO.
    CPU: Q6600 G0 3.5GHz@1.4v (4.2GHz max) / 4790k 4.8ghz @1.265v
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  9. #9
    Member predator500's Avatar
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    Quote Originally Posted by Spawn-Inc View Post
    either one will serve more then what your asking. go with which ever one you like and will fit your case better.

    if you go with the 355 then get a EK Xtop - rev2 or the XSPC Res top. but only if you don't have a top currently. if you have one the small performance increase wouldn't be worth it IMO.
    The case im using is a cool master Haf 932 and i have the XSPC top for the 350 i bought them both at micro center yesterday i also have the old D4 pump.The mcp350 pump i got has the Blue impler but a different PCB so i dont know if i can modd it with the solder mod

  10. #10
    Member predator500's Avatar
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    i dont think i can mod this pump i got the pic from XS i have not found any info about this PCB
    Attached Images Attached Images  

  11. #11
    Spawn-Inc's Avatar
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    open yours and see if it looks like the one above, if it does then you can mod it.

    the blue impeller is the one that can be modded.

    http://martin.skinneelabs.com/Swifte...ve_Review.html
    CPU: Q6600 G0 3.5GHz@1.4v (4.2GHz max) / 4790k 4.8ghz @1.265v
    GPU: 9800GTX /GTX780 hydrocopper
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    HDD: OCZ 120GB Vertex4, Samsung evo 840 250GB
    LCD: Samsung 32" LN32A450, Samsung 226BW 22" wide
    Sound: Logtiech Z 5500
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  12. #12
    Member predator500's Avatar
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    Quote Originally Posted by Spawn-Inc View Post
    open yours and see if it looks like the one above, if it does then you can mod it.

    the blue impeller is the one that can be modded.

    http://martin.skinneelabs.com/Swifte...ve_Review.html
    mine has a blue impeller but the Pcb is just like the pic

  13. #13
    Spawn-Inc's Avatar
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    Quote Originally Posted by predator500 View Post
    mine has a blue impeller but the Pcb is just like the pic
    that's what you want. you solder the empty spot with the yellow wire to get a 18w version.

    or you can solder in a switch so you can change your pump speed on the fly. (eg low speed for bleeding and high for everyday) or how ever you would want to run it.
    CPU: Q6600 G0 3.5GHz@1.4v (4.2GHz max) / 4790k 4.8ghz @1.265v
    GPU: 9800GTX /GTX780 hydrocopper
    Ram: Samsung 4GB /gskill 16gb DDR3 1600
    Mobo: EVGA-NF68-A1 680i (P32) /AsRock Extreme6
    PSU: Enermax Galaxy 850Watt /EVGA 850 G2
    HDD: OCZ 120GB Vertex4, Samsung evo 840 250GB
    LCD: Samsung 32" LN32A450, Samsung 226BW 22" wide
    Sound: Logtiech Z 5500
    CPU & GPU: 3x Swiftech MCR320, 2x MCP655, MCW60 R2, Dtek Fuzion V2, 18 high speed yates @ 5v

  14. #14
    Member predator500's Avatar
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    Quote Originally Posted by Spawn-Inc View Post
    that's what you want. you solder the empty spot with the yellow wire to get a 18w version.

    or you can solder in a switch so you can change your pump speed on the fly. (eg low speed for bleeding and high for everyday) or how ever you would want to run it.
    Ok so if i want to put a Switch do i use like a toggle switch

  15. #15
    Member CharlieCS's Avatar
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    That one doesn't look like it can be modded, blue impeller doesn't guarantee that it can be modded anymore.There are now several revisions, and Laing now uses programmed PWM controller, newer pumps cannot be modded.
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  16. #16
    Member predator500's Avatar
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    It has DDC 3.1 on the PCB

  17. #17
    Member predator500's Avatar
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    here is a pic of the pump with the top
    Attached Images Attached Images  

  18. #18
    Member predator500's Avatar
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    here are some more pic's of the loop
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  19. #19
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    those have a lot of white space and are messing up the display, any way you could be convinced to get rid of all the whitespace?
    If years were seasons, this December would be the December of our December.
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  20. #20
    Spawn-Inc's Avatar
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    Quote Originally Posted by m0r7if3r View Post
    those have a lot of white space and are messing up the display, any way you could be convinced to get rid of all the whitespace?
    +1!

    edit them via paint to get rid of the white.



    and yes a toggle on-off switch is what you want should you go that route.
    CPU: Q6600 G0 3.5GHz@1.4v (4.2GHz max) / 4790k 4.8ghz @1.265v
    GPU: 9800GTX /GTX780 hydrocopper
    Ram: Samsung 4GB /gskill 16gb DDR3 1600
    Mobo: EVGA-NF68-A1 680i (P32) /AsRock Extreme6
    PSU: Enermax Galaxy 850Watt /EVGA 850 G2
    HDD: OCZ 120GB Vertex4, Samsung evo 840 250GB
    LCD: Samsung 32" LN32A450, Samsung 226BW 22" wide
    Sound: Logtiech Z 5500
    CPU & GPU: 3x Swiftech MCR320, 2x MCP655, MCW60 R2, Dtek Fuzion V2, 18 high speed yates @ 5v

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