Alphacool’s VPP755 Eispump boasts lower power draw, less vibration, and stronger head pressure than the popular D5 pump, and they are compatible with all Alphacool D5 accessories.
PC water cooling is growing ever more popular. Thanks to the hobby’s growing popularity in recent years, water cooling companies started investing in R&D to improve the products that they offer to customers.
EK Water Blocks is a prime example. The water cooling company released dozens of water blocks for GPUs and motherboards, and it refreshed its lineup of pump tops and reservoirs in the last 12 months, but it isn’t the only company trying to improve the water cooling market. Alphacool also regularly churns new water blocks, reservoirs, radiators, and even fittings out of its facility.
The water cooling market gets new components all the time, but new pumps are rarely offered. Alphacool decided we were all due, so it built a new pump that retains the D5’s shape but introduces a new internal design.
Alphacool’s VPP755 pump features a ceramic shaft instead of the spherical bearing normally found in a D5 pump, and the designers repositioned the motor coils to improve balance and reduce vibration. With less vibration, the VPP755 can remain quieter than a D5 pump. It also has the bonus of drawing 50% less power than a traditional D5 pump. And even though it draws less power and produces less noise, the VPP755 has a higher head pressure than other D5 variants.
Alphacool’s VPP755 Eispump even offers variable speed options. On the back of the pump, you will find a dial that lets you adjust the maximum RPM at which the motor can operate. Variable speed isn’t a new feature for D5 pumps, but if you try to use PWM control to manage the pump speed, PWM overrides the manual setting.
Alphacool’s VPP755 Eispump doesn’t allow PWM to override the manual setting. Whatever you set the maximum RPM to on the dial becomes the maximum speed of the pump. PWM can control the speed of the pump up to the dialed in speed, and not beyond.
The VPP755 Eispump isn’t a proper D5 variation, but it does retain most of the same dimensions as the Laing D5. Alphacool said that the VPP755 pump is compatible with the company’s lineup of D5 accessories. We suspect that accessories from other companies are compatible., too.
|Header Cell - Column 0||Technical Specifications|
|Dimensions (DxH):||60 x 53,5mm|
|Standard voltage:||12V DC|
|Accepted voltage:||8-13v DC|
|Pressure at 12V:||4m head|
|Pump fluid:||water, water/glycol mixture|
|Maximum system temperature:||65°C|
|Power connection:||4-pin Molex|
|Speed sensor signal:||3-pin|
|Special features:||adjustable to five levels:-Level 1: 1800 RPM-Level 2: 2500 RPM-Level 3: 3200 RPM-Level 4: 3900 RPM-Level 5: 4500 RPM|
It accepts a PWM signal and when such a signal is provided, uses that to determine at what speed it should be running. How is that not "PWM controlled"? Plus they provided an easy way to cap peak RPM without additional software.
Edit: Watch the embedded video for details.
nice thanks :)
That means that originally, at least half the power was consumed by forces other than actually pumping water.
Lets stop and think a sec. (hard for a Monday morning, or a Sunday morning for that matter.)
50% improvement.... say (unit just randomly chosen) it pumped 100 mL per second. The 50% improvement would be 150 mL/S. From the improved position, the old unit is 1/3 less efficient. I do understand your point though and wonder where the losses were.
...maybe we haven't noticed it, because we have been looking at charts that show the D5 below the VPP755.
If you want to link what you're looking at maybe?