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Long Haired Git · 07-09-2006, 09:11 PM

Yep, two specs missing:

1) dBA
2) % of power draw added to loop as heat.

The MCP350 has the lowest % added figures of the common WC pumps at around 60%. This thing is drawing 1.65A @ 115v = 190W.
Even if it can match the class leader and do 60%, that's still adding 110W into your loop as heat. The other 80W don't disappear, they leave as noise, vibration or heat to the air or mounting surface.

Lastly, recall that head increases with the square of the flow rate, and so you won't get even 6 GPM (even?!?!?) out of it as the head will be huge. Then remember the shape of the graphs for flow rate improvements. They are 1/x, and so the benefits of going from 6LPM to 12LPM are not that great, and certainly not enough to offset 110W of extra heat...

07-09-2006, 09:11 PM	#4
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	Re: yar...any1 tried one o these Yep, two specs missing: 1) dBA 2) % of power draw added to loop as heat. The MCP350 has the lowest % added figures of the common WC pumps at around 60%. This thing is drawing 1.65A @ 115v = 190W. Even if it can match the class leader and do 60%, that's still adding 110W into your loop as heat. The other 80W don't disappear, they leave as noise, vibration or heat to the air or mounting surface. Lastly, recall that head increases with the square of the flow rate, and so you won't get even 6 GPM (even?!?!?) out of it as the head will be huge. Then remember the shape of the graphs for flow rate improvements. They are 1/x, and so the benefits of going from 6LPM to 12LPM are not that great, and certainly not enough to offset 110W of extra heat... __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)