In response to the overwhelming demand for a quieter MCP650, Swiftech is proud to introduce the new MCP655 pump, which features several key improvements.
Considerably reduced audible operating noise: the high pitch frequency of the MCP655 is now eliminated thanks to a new chipset controller.
Head and flow characteristics have slightly improved in the midrange
The MCP655 pump is a high reliability, high pressure industrial pump, featuring a 50,000 hour MTBF (5 year lifetime). Such reliability is afforded by the unique design of this pump, which contains only one moving part: the magnetically driven spherical impeller spins on a single ceramic bearing, thus extending the life of this pump beyond existing standards.
The pump is completely plug-and-play, and connects directly to any computer power-supply through standard 4 pin power connectors. It's compact design, quiet and powerful motor make it ideally suited for heavy duty cooling in environments where space is at a premium.
Flow - Pressure - Performance Chart

Note: 3/8" ID Conversion Kit is supplied unassembled.
Users are reminded that disassembling their pump for any reason, including for the purpose of upgrading the housing, automatically voids the pump warranty. (Excludes Swiftech Pump Accessories)
Total Reviews: 21
Average Rating: 
4 Year And Still Running
07-17-2014
Reviewer: Little Heavy weight (5)
I just realized its been running since 11-23-09, gotta respect this pump.
So quiet
02-08-2014
Reviewer: NoobWcer (3)
Just got it can''t speak for life but other reviews for it are great and this thing is super quiet in xspc dual bay res.
Great Pump
09-06-2013
Reviewer: f16-r1 (1)
Have had one running since Aug of 2008 that is 5 years now and running strong. Just ordered another for my new x2 480 rad loop :)
No issues
08-07-2012
Reviewer: Mouse51180 (18)
Have had one with no problem for about 2+ years now and just bought a second one to run dual pumps. So far, both are still running like champs!
Sweet
07-13-2012
Reviewer: Little Heavy weight (5)
Still going strong after 3 years of 24/7 usage.