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Best pump

post #1 of 12
Thread Starter 
looking into my first wc build, and im planning to go all out for this pc.
pretty sure about most stuff, but i was wondering what pumps are most recommended.

i see this Swiftech MCP35X2 and it costs 200, i love the looks of it but i see no other pumps even close to that much,
is that pump really worth it?

thanks guys!
post #2 of 12
a koolance 450s with a 24v controller are really strong too for alot less, Im running 2 in serial

http://martinsliquidlab.org/2011/03/05/koolance-pmp-450s-d5-strong-pump/
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post #3 of 12
btw martins liquid lab is great for info
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post #4 of 12
The reason the Swiftech MCP35X2 cost $200 is because there is two pumps in series, you can also buy them separately if you just want to run one. The Swiftech MCP655 is also a great pump and allows manual adjustment for speeds. The reason why someone would want to run two pumps in series is for redundancy in case one pumps fails, both Swiftech MCP655 and DDC type pumps (Swiftech MCP35X) are most popular!
post #5 of 12
Quote:
Originally Posted by Systemlord View Post

The reason why someone would want to run two pumps in series is for redundancy in case one pumps fails, both Swiftech MCP655 and DDC type pumps (Swiftech MCP35X) are most popular!

or for increased static pressure on highly restricted loops. I doubled my flow going to 2 pumps ( I have a very restricted loop with lots of components
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post #6 of 12
Thread Starter 
So say i want to potentially cool 3 video cards, cpu, and maybe mosfet chips and MAYBE ram, would this pump do the job alright?

like would it do it ok.
would it do it well?
or would it exceede my needs!?


thanks guys!
post #7 of 12
D5 or 35x

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post #8 of 12
Quote:
Originally Posted by protzman View Post

So say i want to potentially cool 3 video cards, cpu, and maybe mosfet chips and MAYBE ram, would this pump do the job alright?
like would it do it ok.
would it do it well?
or would it exceede my needs!?
thanks guys!

D5`s have 4.5 mh20 while the MCP35x has 4.4mh20.

Having two would help with a high restriction loops, but one of either pump can probably still handle all that. The only problem you`d have is your flow rate would be under 1gpm. If you`re going with that many blocks get two pumps.

Might I suggest the koolance res's to have two of either pumps in series?
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post #9 of 12
Define "all out." If you are only going to cool your cpu and a single gpu you wont need more than a single pump, anything above that and you will see minimal performance increases. However, if you are planning on adding more components to the loop then it may be advantageous to you to get a 2 pump setup (ie cpu, 3 gpus, 2+ rads.)

Also, adding 2 pumps in series will NOT...let me repeat that, NOT double your flow. Because most water cooling pumps are centrifugal pumps you need to look at their pump curves as well as know how flow is affected when you add pumps in series or parallel. If you add pumps in parallel you will double the maximum flow rate through the loop, if you add pumps in series you double the amount of pump head (differential pressure) across the pumps. You also need to know that the amount of losses your fluid will see when flowing through your loop is proportional to the total system resistance as well as the flow rate squared.

Long story short, if you have a high restriction loop, use 2 pumps in series, which is what the MCP35X2 is, which is also why it is so expensive. If you are going to use that type of setup I strongly recommend compression fittings (or hose clamps) because the increased pressure of the loop will make leakage more likely. Also keep in mind that the more flow and restriction you have in your system the more suction head (NPSH for you engineers) your pump will need so ALWAYS put your res above your pump, just to be sure, because cavitation is no ones friend.

If you are only going to have a smaller loop, you will be fine with a single MCP35X or a 655. I used to run a loop with a D5 (essentially a MCP655) and I never had any problems.

If you have any other questions please ask, I know a thing or two about high pressure systems.
Edited by lithgroth007 - 2/25/12 at 7:59am
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post #10 of 12
Quote:
Originally Posted by protzman View Post

So say i want to potentially cool 3 video cards, cpu, and maybe mosfet chips and MAYBE ram, would this pump do the job alright?
like would it do it ok.
would it do it well?
or would it exceede my needs!?
thanks guys!
Quote:
Originally Posted by lithgroth007 View Post

Define "all out." If you are only going to cool your cpu and a single gpu you wont need more than a single pump, anything above that and you will see minimal performance increases. However, if you are planning on adding more components to the loop then it may be advantageous to you to get a 2 pump setup (ie cpu, 3 gpus, 2+ rads.)
Also, adding 2 pumps in series will NOT...let me repeat that, NOT double your flow. Because most water cooling pumps are centrifugal pumps you need to look at their pump curves as well as know how flow is affected when you add pumps in series or parallel. If you add pumps in parallel you will double the maximum flow rate through the loop, if you add pumps in series you double the amount of pump head (differential pressure) across the pumps. You also need to know that the amount of losses your fluid will see when flowing through your loop is proportional to the total system resistance as well as the flow rate squared.
Long story short, if you have a high restriction loop, use 2 pumps in series, which is what the MCP35X2 is, which is also why it is so expensive. If you are going to use that type of setup I strongly recommend compression fittings (or hose clamps) because the increased pressure of the loop will make leakage more likely. Also keep in mind that the more flow and restriction you have in your system the more suction head (NPSH for you engineers) your pump will need so ALWAYS put your res above your pump, just to be sure, because cavitation is no ones friend.
If you are only going to have a smaller loop, you will be fine with a single MCP35X or a 655. I used to run a loop with a D5 (essentially a MCP655) and I never had any problems.
If you have any other questions please ask, I know a thing or two about high pressure systems.

Ummm, he said 3 GPU`s a CPU mosfets and maybe ram blocks...
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