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: 16
Average Rating: 
Powerful pump!
12-27-2013
Reviewer: Lieo (2)
despite its power, it runs really quiet. you can never hear it running even in an open case. you''ll hear the fans but not this pump. i have 2 240mm rads + 1 gpu block + cpu block and a dozen angled fittings and this can handle them at a running speed #3
Great pump.
12-05-2013
Reviewer: Great Pump. (1)
I have owned this pump now for almost a year and have liked it a lot. No serious complaints except for the fact that the fittings are not compression fittings. I had to use the plastic zips and zip ties together to eliminate waterleak at the fittings. Overall great.
Bought this 6/8/2012
10-01-2012
Reviewer: Archangel BT2] (1)
About to build another rig (6th one) so looking for more water cooling gear. Bought this pump TWO years ago, still running strong, and silent on max settings. Keeps my i7 920 running at 4.9 Ghz in addition to the motherboard water block on my X583XSLI board. No complaints. Would buy it again. and again....
Spectacular Flow
10-06-2011
Reviewer: nicktlloyd (13)
Love this pump, can''t say enough about it. I''m running a single loop with CPU, mobo and dual GPU blocks with a quad rad and almost 10 feet of tubing. This thing blasts water through all of it. Works extremely well inside the XSPC Dual Bay Res.
Great Pumps!
08-26-2011
Reviewer: Tooterfish (9)
I was unsure about this product. I originally researched the pump on youtube, trying to get an idea for the overall practicality of the pump in comparison to other pumps. I have two of these in a redundant loop, cooling 3 580''s and a 2600k. My flow is overkill with these pumps, but where you get your money''s worth is in the audible nothingness it provides. They are very quiet, and the adjustable (i''m running at setting 2) speed really helps if you''re only cooling a few components. It is expensive, but you will NOT be disappointed, you owe it to yourself and your PC investment to buy this pump.