Water Cooling 106 - Pumps

Sixth in a series of water cooling threads spurred by the recent uptick in questions on the topic..... see starter thread here:

Water Cooling 101 - Should I or Why Bother ?

This thread is obviously intended to focus on Water Blocks. Again, the THG Water Cooling Sticky is a great place to start.

http://www.tomshardware.com/forum/277130-29-read-first-watercooling-sticky

This thread is intended as a spot to share ideas on the subject of Pumps. Unfortunately the sticky is a bit outta date as one of the main resources (skinneelabs.com) is now gone. There is still load of information to be found on http://martinsliquidlab.org/ and the links in the THG sticky.

Here's an informative guide on the topic
http://martinsliquidlab.org/pump-planning-guide/

Like ALC water cooling units, the majority of the pumps used by most peeps are basically rebranded units from one manufacturer.... there are others, but these dominate the market.

Laing DDC - Swiftech MCP35x
Laing D5 - Swiftech 655

The other issue I wrestled with was single loop versus multiple loops and which of course means 1 pump versus 2 .... also whether to use 1 pump per loop or 2 in series in case on dies.

At his point, Im thinking on using the Swiftech Dual Extreme Duty Industrial PWM MCP35X2 Pump (MCP35X2-BK) w/ Heatsink (MCP35X2-HS)

http://www.frozencpu.com/products/14961/ex-pmp-173/Swiftech_Dual_Extreme_Duty_Small_Form_Factor_12_VDC_Industrial_PWM_Pump_-_Black_MCP35X2-BK.html
http://martinsliquidlab.org/2012/01/29/swiftech-mcp35x2-pump/8/

A bit expensive but pits mind at ease with regard to pump failure and speed control concerns.

Alternates, comments suggestions ?

 
Question:

I was considering grabbing one of these buggers .... small 90 watt PSU ..... to make it easier to fill loops w/o starting everything else up or disconnecting everything.
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=31784

Then it occurred to me, why not just leave it connected as a separate 2nd PSU. Two issues come to mind.
a) Adds an extra power cord which needs to be snaked inside the case.
b) I'd want a fail safe shutdown in case the pump cord got accidentally disconnected....Will the PWM cable connection to MoBo function perform this function adequately as it would for a normal CPU fan ?
 
It's available in many configurations ..... can get any power supply plug ya want

http://www.amazon.com/dp/B000MGG6SC/ref=asc_df_B000MGG6SC2730679?smid=A1KINLM6A40SW&tag=shopzilla_rev_406-20&linkCode=asn&creative=395129&creativeASIN=B000MGG6SC

http://compare.ebay.com/like/251198593559?_lwgsi=y&ltyp=AllFixedPriceItemTypes&var=sbar


Yes I have a few old cheap PSUs, but this option being much smaller is far more attractive.

Any comment on the question ? Will the PWM cable connection from the MCP35X2 to MoBo perform the same prevent startup function as it would for a normal CPU fan and either prevent startup or perform a shutdown in case the pump cord got accidentally disconnected. ?
 


I've never used one of those, so I just don't know, Sorry.

 
Really has nothing at all with the 2nd PSU other than adding the possibility that one PSU could be unplugged while the other is.

Let me rephrase......On a box with a single PSU, will the PWM cable connection from the MCP35X2 to MoBo perform the same prevent startup function as it would for a normal CPU fan and either prevent startup or perform a shutdown in case the pump cord got accidentally disconnected.