The Laing D5 has gone by many names - D5, Xylem D5, Lowara D5, MCP655, VPP655, and so on. But one constant among all of them has been a guarantee of a high performance, low noise operation for a PC DIY watercooling pump. Laing, part of Xylem now, has provided the pump motor to their customers, including Swiftech, who then add their own touches in the form of an aftermarket top that looks better, replaced fixed barbs with threaded G1/4" ports, and often better performance. The Swiftech MCP655 has all of these and more with an option of acrylic tops in addition to acetal ones.

As with any other D5, the P-Q curve is fantastic and does the job well with most loops. The coolant actively cools the pump, thus keeping it from overheating, as with the Laing DDC, and this contributes to longevity and reliability as well. The pump is also among the quieter ones out there, although there are now more and more competitors wanting to claim the performance/noise crown. Time will tell if any manage to do so.

That said, given the pump is a common factor to many companies, Swiftech needed to do more to make sure people want to go with their option over that of others. Alphacool offers theirs at a lower price, Bitspower offers custom mod and top kits, EK and Aquacomputer have worked on a new motor, making their D5 PWM pumps more compatible with PWM controllers, and XSPC, Monsoon, and Watercool have worked on providing multiple reservoir-integrated tops to choose from. Swiftech could have simply made their own PWM motor as well; however, they instead worked with Laing to update all Laing D5 PWM pumps, and this is praiseworthy. As it is, there is not much to complain about, and I think the product does enough to merit my highest recommendation.