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post #1091 of 3858
I have 5 TY-140's in my system (2 being installed in my SA). At 100% PWM signal, the 2 SA fans reach about 1340 RPM. For case fans, the 3rd can reach 1290 RPM, 4th can reach 1290 RPM also, and the 5th can only reach 1245 RPM.

Is this normal behavior or the 5th fan has a problem where it wouldn't reach the rated spec?
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post #1092 of 3858
Thread Starter 
Quote:
Originally Posted by kevindd992002;15506796 
I have 5 TY-140's in my system (2 being installed in my SA). At 100% PWM signal, the 2 SA fans reach about 1340 RPM. For case fans, the 3rd can reach 1290 RPM, 4th can reach 1290 RPM also, and the 5th can only reach 1245 RPM.

Is this normal behavior or the 5th fan has a problem where it wouldn't reach the rated spec?

Are they all connected to the same PWM splitter? If the lowest rpm fans are connected to your m/b perhaps it can't keep up with that many 12v fans all at once. Or that could be your psu?

I have three TY-140's on the same PWM splitter and all read above 1300 rpm. Mine has a molex connector for the psu so the only thing the CPU_FAN header is doing is reading the rpm and controlling the PWM signal.

Lastly, perhaps it's an error in whatever software you're using to monitor the rpm of each fan. Either that or your rig may be drawing more power than your psu can give.
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post #1093 of 3858
Quote:
Originally Posted by solsamurai;15506961 
Are they all connected to the same PWM splitter? If the lowest rpm fans are connected to your m/b perhaps it can't keep up with that many 12v fans all at once. Or that could be your psu?

I have three TY-140's on the same PWM splitter and all read above 1300 rpm. Mine has a molex connector for the psu so the only thing the CPU_FAN header is doing is reading the rpm and controlling the PWM signal.

Lastly, perhaps it's an error in whatever software you're using to monitor the rpm of each fan. Either that or your rig may be drawing more power than your psu can give.

I tried connecting one fan after another INDIVIDUALLY to the same fan header to get those results I've posted above. In this way, we eliminate all the factors that you've stated in your post. So what could be the problem? frown.gif

Also, I've noticed a whinning noise from my SA when the fans are at full speed. Is this nomal? You cannot hear it from afar. You will just hear it if you stick your ear close enough to the fins.
Edited by kevindd992002 - 10/30/11 at 3:16am
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post #1094 of 3858
Quote:
Originally Posted by Buzzin92;15504615 
I overclocked my G6950 to 4.3 earlier, played crysis 2 for a while and looked at temps, never went above 55*C Still on passive cooling too which is just awesomely quiet tongue.gif

I wasnt even playing a game and I got temps like that so I think I need to re sit my cooler sooner rather then later ha ha
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post #1095 of 3858
Quote:
Originally Posted by nekromantik;15507654 
I wasnt even playing a game and I got temps like that so I think I need to re sit my cooler sooner rather then later ha ha

Nah you have a quad core with higher tdp wink.gif Yours is fine tongue.gif

I'm only running a dual core at the moment, my i3 didn't turn up the other day so heres hoping it will turn up tomorrow! Dual core with hyperthreading! Should be interesting to see the temps this outputs when overclocked hehe
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post #1096 of 3858
ha ha!
well my Prime95 run at 1.33V for 4.8ghz had higher temps then I wanted. Should have been lower 60s to mid 60s with the Silver Arrow but mine did get to 69 72 72 70 max but on average it was 68 degrees.
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post #1097 of 3858
Kevin - there is a variation in fans. Usually it's +/- 10% but I've seen +/- 15% quoted. That said, I notice that in my current runs, the fans go faster now that they are connected to Molex directly from the PSU rather than getting their power from the motherboard. I think it is because the mb does not pass a full 12 Volts to its headers. It's kind of like fan controllers. They don't pass on 12 Volts, so the max rpm's I see through my controllers is less than that I get from direct Molex connections.
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post #1098 of 3858
Quote:
Originally Posted by ehume;15507853 
Kevin - there is a variation in fans. Usually it's +/- 10% but I've seen +/- 15% quoted. That said, I notice that in my current runs, the fans go faster now that they are connected to Molex directly from the PSU rather than getting their power from the motherboard. I think it is because the mb does not pass a full 12 Volts to its headers. It's kind of like fan controllers. They don't pass on 12 Volts, so the max rpm's I see through my controllers is less than that I get from direct Molex connections.

Ah, but do you think the difference is substantial between connecting them to the mobo vs. directly to the PSU molex?

And knowing that for the same connection to the fan header, one does 1300RPM there and one can only go up to 1245RPM, that is the +/- 1% tolerance, right?
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post #1099 of 3858
Quote:
Originally Posted by kevindd992002;15508178 
Ah, but do you think the difference is substantial between connecting them to the mobo vs. directly to the PSU molex?

Yes. The same fans connected to the mb in my Megahalems testing in item 1 were connected directly to the psu in the D14 testing in item 4 of my sig. I haven't sat down and calculated it exactly, but I'd say there is a 10% difference between them.
Quote:
And knowing that for the same connection to the fan header, one does 1300RPM there and one can only go up to 1245RPM, that is the +/- 1% tolerance, right?

1% of 1300 is 13. 1300-1245=55, or slightly more than 4% of 1300. That variation is within spec.
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post #1100 of 3858
Quote:
Originally Posted by ehume;15508624 
Yes. The same fans connected to the mb in my Megahalems testing in item 1 were connected directly to the psu in the D14 testing in item 4 of my sig. I haven't sat down and calculated it exactly, but I'd say there is a 10% difference between them.



1% of 1300 is 13. 1300-1245=55, or slightly more than 4% of 1300. That variation is within spec.

Ok. I meant +/- 10% in my previous post, not 1%, sorry. With your TY-150's though, did you ever get below 1245RPM at full PWM?
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