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655-B vs 355 vs X2O

Poll Results: Which pump?

 
  • 46% (6)
    655-B
  • 38% (5)
    355
  • 0% (0)
    X2O
  • 15% (2)
    other
13 Total Votes  
post #1 of 13
Thread Starter 
655B w/ res - $123
355 w/ res - $113
X20 w/ res - $50

On a loop with...
XSPC Rasa CPU block
2x EK VGA Supreme GPU blocks
XSPC RX360 radiator
XSPC dualbay res for specific pump (DDC/D5/X2O)
+
possible future XSPC RS120 and/or RX240


I made a thread because I wanted a broader view on which pump I should get for this specific system. I understand that the 355 has greater pressure, the 655 has great flow, yada, yada, yada, and that each pump has it's own uses; which would be used for a greater potential for me personally?
I have considered sticking with the X2O, but I would rather get it right the first time. Your opinion on this?



EDIT: I do not give a **** about noise or space consumed. I want the best performing pump for my specific system.
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post #2 of 13
From what I've read:

Multiple blocks and rads - go with the MCP350/355/35x
Less restrictive loop (fewer blocks and rads) - go with the MCP655

I'm running a DD-CPX1 (aka Dtek DB-1) that doesn't have nearly as much head pressure OR flow as either option, and it handles 2 blocks and 2 rads with a res "okay."

I'm about to add another GTX470 (with another GPU block) to my loop, so I'm upgrading the pump and res. About to buy the MCP350/DDC-1 from BMaverick for $35 shipped new. Supposedly he has a bunch of them and has been selling them for the past few months with no issues. Add a dual bay res for $35 from SVC.com, and you've got a nice $70 solution that should handle anything you throw at it.

EDIT:

Link to BMaverick's MCP350 FS thread

Link to SVC.com Dual Bay Res for DDC

Link to SVC.com 10% off coupon code thread on OCN
Edited by c00lkatz - 4/23/11 at 9:23am
     
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post #3 of 13
Thread Starter 
In that case, I could run two MCP350s in a line.
Would that help anything? Two of them would be $70 (almost the price of a 355), and a dual-pump reservoir costs just as much as a single-pump reservoir.

EDIT: Plus, using this mod, I could run 2x 355s for the same price as one. Anyone's thoughts?
Edited by Buska103 - 4/16/11 at 5:43pm
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post #4 of 13
Quote:
Originally Posted by Buska103 View Post
In that case, I could run two MCP350s in a line.
Would that help anything? Two of them would be $70 (almost the price of a 355), and a dual-pump reservoir costs just as much as a single-pump reservoir.

EDIT: Plus, using this mod, I could run 2x 355s for the same price as one. Anyone's thoughts?
I think the dual pump res is like $8 more, so yeah not a big difference, however I think those are meant for dual loops. The pumps are separate inside the res with separate inlets/outlets. Not a problem if you plan on running more than one rad, and actually somewhat preferable.

Personally I think 2 pumps would be a bit overkill for your setup.

Quote:
Originally Posted by Buska103 View Post
EDIT: Plus, using this mod, I could run 2x 355s for the same price as one. Anyone's thoughts?
That's only for certain revision PCB's. If you look at the pics in BMaverick's FS thread posted by Martin (from Martin's Liquid Labs), it shows the bare PCB's and they don't have that extra pad to solder bridge. You're not really looking at a HUGE performance increase anyway.

EDIT: Yeah the dual DDC dual bay res is split chamber for 2 loops rather than running them in series.

http://www.svc.com/ddcbaytwo.html

Plus SVC is out of stock, not that you couldn't possibly find it somewhere else (albeit probably more expensive).
Edited by c00lkatz - 4/16/11 at 5:48pm
     
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post #5 of 13
Thread Starter 
Can't I connect the separate rads (on the dual rad version) simply using tubing the connect the two ports? Having two reservoirs... which wouldn't really make a big difference.

I could have one pump running the whole loop or two loops, one for the CPU and the other for the GPUs.

Thoughts?
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post #6 of 13
Quote:
Originally Posted by Buska103 View Post
Can't I connect the separate rads (on the dual rad version) simply using tubing the connect the two ports? Having two reservoirs... which wouldn't really make a big difference.

I could have one pump running the whole loop or two loops, one for the CPU and the other for the GPUs.

Thoughts?
My vote would go for the dual loop option if you want 2 pumps. Keep the heat separated. With the split chamber res you actually have a bit less res volume, because both chambers are split with extra acrylic for the additional pump mount and the displacement of the pump itself.
     
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post #7 of 13
I would just get either the X20 750 or the 655 + Bay reservoir. Either of the pumps will easily handle your setup. I wouldn't get the 355 because it produces a lot of vibration, and since you will be mounting it in your drive bays it would make a lot of noise. The 655 would be much quieter in a bay reservoir.
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post #8 of 13
Double edit lol: Charliehorse's idea is actually the best and I forgot about the mcp355s vibration. In that dual bay reservoir a 655 would be the best as stated.
Edited by Kinru - 4/16/11 at 7:05pm
post #9 of 13
Thread Starter 
All noise and space aside, which pump would offer me the lowest temperatures?

All I'm asking.
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post #10 of 13
All of the pumps will give you the same temperatures within 0.5C of each other. The other factors at play are much more relevant.
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