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Pump noise and sound comparison - Page 2

post #11 of 22
I've never had ddc's but I've had d5 Vario and pwm in xres and bay res configurations and I'm back to d5 Varios (2) in a xspc bay res. When I initially switched to the pwm xres from the Vario twin bay res, I noticed a lot of vibration noise and figured I needed to isolate it better. I tried making a simple loop outside my case and held the pump/res while it was running and I could still hear just about as much noise when above 55% pwm. Like the Vario, it has its quiet spots all over the spectrum but I can't seem to get a good quiet speed without staying way down low.
With my twin Vario's, I can run them both just below "4" and I can barely hear them at all over my fans at 600rpm while idling. Once my fans get to 1100rpm, they are inaudible.
Since I use mayhems aurora, I need to keep my flowrate as high as possible, otherwise the xres would be able to cool my loop very quietly
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i7 4790k EVGA z97 Classified SLI gtx 980 klevv neo 
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Intel 535 SSD seagate barracuda Custom Loop windows 10 
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Dell S2716DG Asus PB277Q Logitech G710 Corsair RM1000x 
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post #12 of 22
Thread Starter 
Quote:
Originally Posted by 0ldChicken View Post

I've never had ddc's but I've had d5 Vario and pwm in xres and bay res configurations and I'm back to d5 Varios (2) in a xspc bay res. When I initially switched to the pwm xres from the Vario twin bay res, I noticed a lot of vibration noise and figured I needed to isolate it better. I tried making a simple loop outside my case and held the pump/res while it was running and I could still hear just about as much noise when above 55% pwm. Like the Vario, it has its quiet spots all over the spectrum but I can't seem to get a good quiet speed without staying way down low.
With my twin Vario's, I can run them both just below "4" and I can barely hear them at all over my fans at 600rpm while idling. Once my fans get to 1100rpm, they are inaudible.
Since I use mayhems aurora, I need to keep my flowrate as high as possible, otherwise the xres would be able to cool my loop very quietly

So if i understand you correctly, your experience is that the D5 pwn with X-res series was louder then the Vario with set speed?
post #13 of 22
Thread Starter 
Quote:
Originally Posted by scrawl5 View Post

. Mine is at 800 rpm (lowest).

How do you set it to 800 rpm? My asus gene bios says PWM lowest is 40%, is 800 rpm 40% of max rpm?
post #14 of 22
Quote:
How do you set it to 800 rpm? My asus gene bios says PWM lowest is 40%, is 800 rpm 40% of max rpm?
With a fan? Different PWM devices have different duty cycles. For example, EK sells an "extended range" variant of their vardar fans that goes down to 20%. Most fans only go to about 30-40%. My pump goes to 20% which is 800 rpm, just as advertised on the spec sheet.

If your motherboard doesn't support PWM below 40% whatsoever, then that would be a problem, but I think it is more likely a limitation of the fans you are using. Do you have a "detect starting voltage" function for the fan headers in your BIOS? It's called "Q-Fan Tuning" on my Asus/GryphonZ97 board. If you have that function then you should be set.
Edited by scrawl5 - 2/23/16 at 3:31pm
post #15 of 22
Quote:
Originally Posted by Stalefish View Post

So if i understand you correctly, your experience is that the D5 pwn with X-res series was louder then the Vario with set speed?
yes, if your going for a high flowrate and need over 50% power, I find the Vario quieter in both the xres and bay res. Lower speeds I can't tell a difference.
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i7 4790k EVGA z97 Classified SLI gtx 980 klevv neo 
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Intel 535 SSD seagate barracuda Custom Loop windows 10 
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post #16 of 22
I have a Swiftech MCP35X (PWM) pump running my loop (3 × 140mm Black Ice Extreme Rads, CPU, and 1 GPU). I had an XSPC bay res and switched to the Monsoon Two Series bay res. I'm impressed by how quiet the pump is now. Vibrations are noticeably lower. I found myself checking to make sure the pump was on because I couldn't hear it anymore.
post #17 of 22
Thread Starter 
Quote:
Originally Posted by scrawl5 View Post

With a fan? Different PWM devices have different duty cycles. For example, EK sells an "extended range" variant of their vardar fans that goes down to 20%. Most fans only go to about 30-40%. My pump goes to 20% which is 800 rpm, just as advertised on the spec sheet.

If your motherboard doesn't support PWM below 40% whatsoever, then that would be a problem, but I think it is more likely a limitation of the fans you are using. Do you have a "detect starting voltage" function for the fan headers in your BIOS? It's called "Q-Fan Tuning" on my Asus/GryphonZ97 board. If you have that function then you should be set.

No i ment your pump tongue.gif

Yeah i have Gene VI and bios says 60% on dc and 40% with pwm..

I have to check bios when i get home from work. Or i can read the manual @ work hehe.

I can use speedfan to set lower rpms, but its always a hazle getting speedfan to autostart with the startup parameters i need to set with the new version.
post #18 of 22
Thread Starter 
@scrawl5 what kind of fans do you use? Been looking at EK vardar, Noctua, Fractal designs liquid bearing fans and so on.

I have corsairs AF140 fans in my case, and i had i my previous case noctua 120 redux fans. PWM version tho, so pwm motor didnt like undervoltage.. clicking sound was kind of bad.

I know that at low rpm like 700-1000 there isnt mutch difference in soundlevel, but im trying to figure out what fans have the best pressure at those rpms.
post #19 of 22
I use 6 of these http://www.blacknoise.com/site/en/products/noiseblocker-it-fans/nb-multiframe-series/120x120x25mm.php?lang=EN @ around 500 rpms. They are not that optimized for static pressure though. Pretty much the only reason I got them is their good review on SPCR. I'm not sure if static pressure matters very much at low rpms with low fpi rads.
post #20 of 22
Thread Starter 
Scr
Quote:
Originally Posted by scrawl5 View Post

I use 6 of these http://www.blacknoise.com/site/en/products/noiseblocker-it-fans/nb-multiframe-series/120x120x25mm.php?lang=EN @ around 500 rpms. They are not that optimized for static pressure though. Pretty much the only reason I got them is their good review on SPCR. I'm not sure if static pressure matters very much at low rpms with low fpi rads.


Yeah im kind of in a fan limbo right now. Trying to figure out witch fans have the best static pressure at about 700 rpm. I read from martin liquid lab and i think i was quitepc that fans below 1000rpm are about the same when i comes to acustics. The only difference is the motor sound, and how the fan reacts to low voltage. Some fans have a higher motor noise when undervoltage.

So... i dont know really... It would really suck to buy 6 fans for about 15$ a pice and not be pleased.. :/
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