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Looking for a 24 volt solution for laing D5 pump

post #1 of 6
Thread Starter 
Right now, I have a MCP50X pump. To be frank, I think it is very noisy. I used to own a swiftech mcp655 before that (It eventually broke down sadsmiley.gif) and I remember it being a LOT quieter, so I eventually want to switch it up back to a laing D5 (or variant since thats what the MCP655 was). Then I read that it can operate at up to 24 volts. Is there a sane, inexpensive way to get 24 volts from an ATX power supply? Some way to convert the 12v to 24v? Also to those who HAVE run 24v through their D5, how does the noise compare? I remember 12v being dead silent, except for a high pitched sound, kind of like what you hear from a CRT TV.
post #2 of 6
Not sure why you want to run it at 24v. There is minimal difference in flow rate across most restrictions from 13v to 24v with the laing D5 pump.

http://www.xtremesystems.org/forums/showthread.php?170217-Some-Laing-D5-Testing-13-1-24V-is-the-same
post #3 of 6
Quote:
Originally Posted by ssateneth View Post

Right now, I have a MCP50X pump. To be frank, I think it is very noisy. I used to own a swiftech mcp655 before that (It eventually broke down sadsmiley.gif) and I remember it being a LOT quieter, so I eventually want to switch it up back to a laing D5 (or variant since thats what the MCP655 was). Then I read that it can operate at up to 24 volts. Is there a sane, inexpensive way to get 24 volts from an ATX power supply? Some way to convert the 12v to 24v? Also to those who HAVE run 24v through their D5, how does the noise compare? I remember 12v being dead silent, except for a high pitched sound, kind of like what you hear from a CRT TV.


If head pressure is what you want with low noise especially at idle, then get a 35x. It's got slightly less (roughly 1psi less) head pressure than a strong at 24v at 1gpm, and it costs a bit less to boot. If you were to go thru with it anyways, you'd need to get a controller to convert power. Those are like 40 bucks and up for a single.
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by kl6mk6 View Post

Not sure why you want to run it at 24v. There is minimal difference in flow rate across most restrictions from 13v to 24v with the laing D5 pump.

http://www.xtremesystems.org/forums/showthread.php?170217-Some-Laing-D5-Testing-13-1-24V-is-the-same

that link helped a lot, thanks. I guess I can just not bother with some ebay solution to convert 12v to 24v. I've seen a couple circuit boards that have adjustable input and output, but if the pump has circuitry to limit power consumption at >12v levels, then don't really an option with that.

tsm106, i made a mistake, i have the mcp35x already (swiftech maelstrom, not the v2) and not the mcp50x. so switching to a mcp35x is kind of silly to suggest. i think they are noisy and I want something quieter but has really good performance like the mcp655. the ultimate aim was to get something quieter / silent with the same or better performance. I don't like the whining whirring sound this pump has, it keeps me awake at night. lowering the RPM through PWM is not an option, and sometimes it takes a long time for the pump to start up from powering on, which may burn my CPU.
post #5 of 6
Quote:
Originally Posted by ssateneth View Post

Quote:
Originally Posted by kl6mk6 View Post

Not sure why you want to run it at 24v. There is minimal difference in flow rate across most restrictions from 13v to 24v with the laing D5 pump.

http://www.xtremesystems.org/forums/showthread.php?170217-Some-Laing-D5-Testing-13-1-24V-is-the-same

that link helped a lot, thanks. I guess I can just not bother with some ebay solution to convert 12v to 24v. I've seen a couple circuit boards that have adjustable input and output, but if the pump has circuitry to limit power consumption at >12v levels, then don't really an option with that.

tsm106, i made a mistake, i have the mcp35x already (swiftech maelstrom, not the v2) and not the mcp50x. so switching to a mcp35x is kind of silly to suggest. i think they are noisy and I want something quieter but has really good performance like the mcp655. the ultimate aim was to get something quieter / silent with the same or better performance. I don't like the whining whirring sound this pump has, it keeps me awake at night. lowering the RPM through PWM is not an option, and sometimes it takes a long time for the pump to start up from powering on, which may burn my CPU.

The vario and pwm pumps have like no appreciable gain going to 24v in the usable gpm range. The strong however almost doubles in head pressure. That said, you're using a DDC in a bay res, of course its going to be stupid loud. You've got the pump coupled to the freaking case man! Run a 35x by itself, or with the feet from the optional heatsink, in other words decouple it from the case and using a proper pwm curve and they are silent. In other words, the noise is from your setup. Btw, just re-read, you're not using the pwm? It's rather strange to buy a pump designed to idle super low, ie. quiet and not run it in that mode you know? The 35x at 55% duty cycle achieves roughly 95% of its useable power, which means if used right it never gets loud...
Edited by tsm106 - 5/16/15 at 11:20pm
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post #6 of 6
My mcp35x is dead silent even at full tilt after i mounted it to foam instead of the case. The 50x is louder than the 35x.

My D5 vario at setting 3 in my alt rig is much louder because its mounted to the back of the rad that's mounted to the case.

No pump is silent when mounted diectly to the case.
Edited by Wirerat - 5/17/15 at 4:33am
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Cable box
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Phat Bits
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(16 items)
 
CPUMotherboardGraphicsRAM
i7-4790K 4.8ghz @ 1.245v Asus Maximus Hero VI 4GB Asus Strix GTX 980 Gskil Trident 2400 CL10 
Hard DriveHard DriveHard DriveOptical Drive
128GB sandisk extreme SSD 2 tb Western digital media intel 530 128 gb SSD External LG BD RW 
CoolingCoolingCoolingCooling
EK Coolstream 360mm PE Rad  Gentle typhoon AP-15 X 3 Fractal Design 140mm 1000RPM X3 Fractal Design Venturi High Flow Series 140mm F... 
CoolingCoolingCoolingCooling
Bitspower DDC Heatsink Black EK Coolstream XTC 140mm Rad EK Supremecy MX  EK FC980 Strix Water Block 
CoolingCoolingOSKeyboard
swiftech MCP-35X EK XRES 140 DDC Top WIN 7 ULTIMATE smk link 
PowerCaseMouseOther
Seasonic G-750  Fractal Design R5 G700s HDHOMERUN 3 TUNER CABLE CARD 
CPUMotherboardGraphicsRAM
4770k 4.5ghz @1.29v asus z87-A EVGA 4gb GTX 970 FTW 1510mhz 8000mem 1.23v Adata XPG 8GB @ 2400mhz 11-13-13-35-1 
Hard DriveHard DriveCoolingCooling
OCZ VERTEX 3 90GB 1tb 7200 Seagate hybrid  D5 vario Primo chill 120mm D5 Compression Res 
CoolingCoolingCoolingCooling
Swiftech MCR-320 XP 360mm rad Swiftech MCR-320 XP 120mm rad EK Supreme LTX Cpu block Biitspower ACX GTX 970 Water block 
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