Welcome to my “living” review/preview of the Swiftech MCP 655-PWM DRIVE. What do you get when you couple our most reliable, most silent, and most cool running pump with PWM technology?
A Swiftech MCP 655 PWM-DRIVE!
I have been using D5 variants for about 5 years now and have always admired them as probably being the most tried and true pump out there serving many systems for 5 years + and going strong.
However, I have also recently come to admire having PWM control over pumps such as the Swiftech MCP-35X in which I was able to automatically speed up and slow down the pump to meet thermal demands. PWM is also of value for special reservoir tops and other cramped installations where manually getting to the pump speed control is difficult after installation.
With the added PWM features, you no longer need to touch the pump physically to change speeds and you now have the flexibility to control it manually or automatically through a variety of PWM controlling software.
A special thanks to Mark from Frozen CPU for sponsoring the pump used in this review.
Manufacturer Description & Specifications
In response to the overwhelming demand and popularity of the MCP655 Series FrozenCPU.com has worked with Swiftech to bring you a more versatile version. Want your pump to run as quiet as possible? Now you can have that as well as the available power of the MCP655 in the all new MCP655-PWM. That is right, a PWM version on the MCP655!!
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 and a PWM 4-Pin header. It’s compact design, quiet and powerful motor make it ideally suited for heavy duty cooling in environments where space is at a premium.
This pump comes stock without any housing allowing you to integrate any of your favorite pump tops and 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-PWM 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-PWM is particularly well adapted to high-flow systems using 1/2″ ID or 3/8″ ID Tubing
- Compact Design
- No maintenance when used with de-mineralized water, and anti-fungal additives (Swiftech HydrX additive is recommended)
Nominal voltage: 12 V DC Operating voltage range: 8 to 24 VDC Nominal power (@ 12 V): 37 W Max Nominal current (@ 12 V): 2 amps Motor type: Brushless, microprocessor controlled Maximum head: 13 ft (4 m) Maximum discharge: ~ 317 GPH (1200 LPH)
Performance will vary based on housing used
So, the hydraulic specs appear to be the same as the MCP 655, however there are some minor differences in the nominal power rating of 37W and operating voltage. The 13ft of maximum head is right in line with what I have measured myself with other D5 variants, but power consumption for my test bench has typically toped out around 21 watts or so depending on restriction.
We’ll have to put it through the ringer of tests and see how it compares. Perhaps there are some differences in RPM scaling over the vario model and perhaps the PWM feature allows a greater range of RPM operation.