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)

• 50,000 hours MTBF (Mean Time Between Failure) equivalent to 5 years lifetime
• Superior 12 Volts DC convenience: plugs into the computer power supply
• The MCP655 can be used with full confidence in any MP servers, and high-end workstations
• Superior real world performance versus any aquarium pump we have tested to this date
• The high pressure capability of the MCP655 is particularly well adapted to high-flow systems using 1/2" ID or 3/8" ID Tubing
• Compact Design
• Quiet Operation even at high speeds thanks to the new chipset controller
• 1/2" barb fittings with 3/8" conversion system
• No maintenance when used with de-mineralized water, and anti-fungal additives (Swiftech HydrX additive is recommended)
• Quick installation with adhesive neoprene pad, or permanent installation with thru-bolts.
• Speed control for system fine tuning

Nominal voltage:	12 V DC
Operating voltage range:	6 to 24 VDC
Nominal power (@ 12 V):	24 W
Nominal current (@ 12 V):	2 amps
Motor type:	Brushless, microprocessor controlled
Maximum head:	13 ft (4 m)
Maximum discharge:	~ 317 GPH (1200 LPH)
Connection size:	1/2" barbs (3/8" w/ conversion kit)
Maximum pressure:	50 PSI (3.5 BAR)
Temperature range:	32 °F to 140°F (0 °C to 60 °C)
Electrical connector:	4-pin Power Supply Connector
Weight:	1.4 LB (650 gr.)
Impeller Housing material:	Noryl®
3/8" ID Conversion Kit
Included:	4 x 3/4" OD Clamps 1 Foot of 1/2" ID / 3/4" OD Clear Tubing 2 x 1/2" ID to 3/8" ID Line Reducers

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....

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.

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.

04-04-2011
Reviewer: HASTE (4)
I came from an MCP 600 after running it 24/7 for about 8 years. It was quite audible, but performed well enough plus it lasted well beyond the MTBF. After getting my new loop installed and was turning this pump on for the first time, I did not think it was running at all, until I saw the water it was moving. It has a "soft start" so be prepared and do as the other reviewer suggested and have the pump pre-primed(water at the intake) or you will cause damage in a hurry. I cannot hear the pump, even on max settings, over my 5 raptors and 7 fans(low speed). I would have no problems suggesting this pump to anyone!

03-02-2011
Reviewer: flatsixdc (22)
Initially it was silent at all speeds, but while still getting rid of bubbles it developed a rattle on the #5 speed setting. At 4 1/2 it is silent still, but I think I might RMA it. Otherwise, yeah, terrific pump.