Does flow rate of water blocks matter in a water cooling loop?

[karcar549]

I want a waterblock for my loop.Does flow rate of the waterblocks matter?i will be using 3/8 inch id 5/8 inch od tubing and 2 480mm radiators and a gpu block and a phobya balancer 250 reservoir and an mcp655 pump.

The lower flow block:
http://www.performance-pcs.com/cata..._info&cPath=59_971_498_1176&products_id=36091

The Higher flow block:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=36055

Which one should i buy? the phobya block has a low flow rate of 146 and the koolance 380i has a higher flow rate of 181 so which one should i buy?
Thanks

 

[RnRollie]

relative best blocks in "normal" application Koolance 380 & XSPC Raystorm.
Best mounting system: Swiftech

Checkout stren's waterblock comparisions
http://www.xtremesystems.org/forums...lock-Roundup&p=5191040&viewfull=1#post5191040

 

[lkrose78]

...Does flow rate of the waterblocks matter?

In most systems with today's pumps, it really doesn't effect the flow much. Just keep in mind that your system should flow, at a minimum 1 ~ 2gph to be effective.

There are several sites that have the actual restrictions listed for various rads, waterblocks, fittings etc, and my favorite is Martins Liquid Lab

Hope this helps.

 

[GTXJackBauer]

As long as the flow rate is 1.0 GPH to 1.5 GPH you should be good. I believe 2.0 GPH is diminishing returns and isn't needed if I recall correctly.

 

[lkrose78]

As long as the flow rate is 1.0 GPH to 1.5 GPH you should be good. I believe 2.0 GPH is diminishing returns and isn't needed if I recall correctly.

I consider it the top end of the scale also...only adds noise in my opinion.

 

[EarthDog]

As long as the flow rate is 1.0 GPH to 1.5 GPH you should be good. I believe 2.0 GPH is diminishing returns and isn't needed if I recall correctly.

Correct (according to Martin's labs). After 1.5GPM it is diminishing returns. More than that is more pump noise, LOL!

 

[karcar549]

can an mcp655 handle this loop:
1.Phobya UC-1 extreme brass water block
2. 2 nexxxos quad 120mm xt45 radiators
3.phobya balancer 250 reservoir
4.Ek gtx 780 ti water block

 

[EarthDog]

Yep.

 

[lkrose78]

can an mcp655 handle this loop:
1.Phobya UC-1 extreme brass water block
2. 2 nexxxos quad 120mm xt45 radiators
3.phobya balancer 250 reservoir
4.Ek gtx 780 ti water block

The newer mcp-35x is probably more efficient in this build as it will also throttle back when not being hammered.