NV5 Silencer question

[joecool]

folks, just got my nv5 silencer from pctoys and installed it on my pny 6800gt, the lower sound is great (nv5 fan is essentially silent), but i' disappointed in several things:

1) doesn't seem to have helped my temps in any meaningful way, in fact it may be running a few degress C hotter - right now, idle temps are 60/36, oc'ed to ultra speeds. this seems much hotter than what other folks are reporting.

2) i believe the fan is blowing in the wrong direction. if i put my hand under the fan there is a very strong flow of air coming off the fan, INTO the case. at the back of the case there the cooler supposedly exhausts warm air there is a very faint whisper. this is a major dissapointment as the ability to exhaust hot air from the case was one feature i really liked.

i tried reversing the wires in the header that connects the fan to the vid card but the result was that the fan didn't spin at all. this was also suprising - shouldn't reversing the wires reverse the current in the coils and reverse the direction of the fan?

has anyone else noticed if their fan is truly pushing air out of the case? can anyone tell me which way your fan spins? keeping in mind that the fan blades are curved the fan can either spin with the tip of the blade going "first" and scooping air into the curve of the blade, or with the "closed" side of the curve going first, pushing air away from the blade. mine spins in the second direction.

any thoughts would be much appreciated, i really hate to have to return this, but the results i'm getting aren't worth the $37 i paid for it!

 

[tbaron55]

I just installed mine and am seeing the same results. The fan appears to be turning the opposite way than it should be based on how the fins are shaped.

I thought about reversing the wires myself but saw what happened to you when you did. Hopefully someone can tell us how theirs is working.

 

[Gagabiji]

Uhhhhhh...dude. People are getting your temps but the thing they are doing differently is...THEY ARE RUNNING AT GT SPEEDS.

OMG dude. The video card is supposed to pull the hot air OFF of the video card, not pull air onto it.

If I were to sum you up, I would say you are a git who doesn't know what he is doing.

 

[joecool]

Originally posted by: SirDude
Uhhhhhh...dude. People are getting your temps but the thing they are doing differently is...THEY ARE RUNNING AT GT SPEEDS.

OMG dude. The video card is supposed to pull the hot air OFF of the video card, not pull air onto it.

If I were to sum you up, I would say you are a git who doesn't know what he is doing.

the git is clearly you ... if you'd have actually done any research before your moronic post you would know that many folks are getting ~5C cooler than i am.

and, if you had any actual knowledge of the cooler you would know that it advertises it's ability to pull cool air from inside the chasis and exhaust the warm air (after flowing over the fins of the heat sink) out the back.

what's the point of recirulating increasingly warm air inside the chasis, smart guy?!

(moron. clearly someone who got their post count up in the OT forum)

 

[MercenaryForHire]

Originally posted by: joecool
(moron. clearly someone who got their post count up in the OT forum)

Oh, you did not just knock OT nefs.

Anyhow. The fan's airflow will be "towards" the concave side of the blade - "Example #1" in your list. I've yet to see a fan that has the reverse flow you describe, and I'm currently looking at *counts* five counting the room fan.

Something's borked with your Silencer, I'd wager. Pics?

- M4H

 

[klah]

Originally posted by: joecool

i tried reversing the wires in the header that connects the fan to the vid card but the result was that the fan didn't spin at all. this was also suprising - shouldn't reversing the wires reverse the current in the coils and reverse the direction of the fan?

You can not simply reverse the current in a normal DC brushless motor and reverse its direction. This requires a motor with an H-bridge such as those used in automotive applications for power windows, locks, etc.

Have you emailed them and asked which direction the fan is supposed to rotate?

help AT arctic-cooling DOT com

 

[joecool]

Originally posted by: MercenaryForHire
[QAnyhow. The fan's airflow will be "towards" the concave side of the blade - "Example #1" in your list. I've yet to see a fan that has the reverse flow you describe, and I'm currently looking at *counts* five counting the room fan.

Something's borked with your Silencer, I'd wager. Pics?

- M4H

yeah, i should post some pics, the shape of the blades is somewhat unique - they aren't tilted at all on the axis perpendicular to the fan motor - they're straight up and down. they are also curved in a semicircular shape. so i'm not sure which way the air should go given the shape and rotational direction of the blades. what i am sure of is that silencer advertises that it sucks air from the case, pushes it across the heat sink fins, and ejects it from the case. i'm also sure my doesn't do that!

anyway, i'm probably just going to send it back. while it is more quiet than the stock solution the other issues kind of negate the benefit. the stock solution on the pny is actually pretty good i guess!

 

[Keysplayr]

From the looks of the cooler, It seems that it was designed to "pull" cooler air from outside of the case, draw it across the heat sink, and eject it out of the fan and into the case. That is what the rotation and the actual position of the fan is telling me. So the vent in the back of the case is actually an intake instead of an exhaust. Either way, this is still better than just recycling ambient air inside the case.

Pic here

 

[klah]

http://www.insanetek.com/revie...lencer/images/DHES.JPG

 

[oldfart]

Silencers dont work that way. They use DHES (direct heat exhaust system). Air is pulled toward the GPU and exhausted out the back. If it is working properly, you should have hot air coming out the back of the case.

 

[joecool]

Originally posted by: klah
http://www.insanetek.com/revie...lencer/images/DHES.JPG

thank you, klah. i shouldn't have been so lazy and posted that in the first place. artic cooling clearing advertises the functionality as pushing air from the inside of the case across the hs and out of the case. and this clearly isn't happening with my unit.

btw, keysplayr, neat graphic. my fan is actually rotating opposite the direction your arrow shows ...

 

[Keysplayr]

Guys, I understand that it is "advertised" to exhaust hot air. But if that fan in my posted pic is turning counter-clockwise, its pulling air in, not pushing it out. Look carefully at the blades and the overall position of the fan. It's either that or very poorly designed. And I can say that because I design cooling solutions for medical equipement. And just by looking at this NV5 cooler, its just wrong. Then again, I don't have one in my possesion so, just my observation. We call that kind of fan a "squirrel cage", or "blower".

 

[klah]

Originally posted by: keysplayr2003
Guys, I understand that it is "advertised" to exhaust hot air. But if that fan in my posted pic is turning counter-clockwise, its pulling air in, not pushing it out. Look carefully at the blades and the overall position of the fan. It's either that or very poorly designed. And I can say that because I design cooling solutions for medical equipement. And just by looking at this NV5 cooler, its just wrong. Then again, I don't have one in my possesion so, just my observation. We call that kind of fan a "squirrel cage", or "blower".

Test one with an anemometer and write a scathing technical review that shakes the pc world to its core :Q

 

[imported_Salvatore]

Tag.

 

[moonboy403]

i just installed mine....it idles at 55c(@420/1140)
maybe you guys just need to tighten the screws
i tightened mine till i couldn't using bare hands
i doubt that you'll break the core this way

 

[joecool]

Originally posted by: moonboy403
i just installed mine....it idles at 55c(@420/1140)
maybe you guys just need to tighten the screws
i tightened mine till i couldn't using bare hands
i doubt that you'll break the core this way

i tightened mine WAY past that - used a screw driver - kind of nervous about breaking the screws but just seemed like thumb tightening wasn't enough. if you put your hand under the fan do you feel a strong flow of air? and do you feel ANYTHING coming out the back?

keysplayer, i believe you, per my last post my fan is rotating in the clockwise direction in your picture. so are you saying that it should be pushing air out then? 'cause i still say it isn't. and, yes, i do think it's a poor design, which is why i'll be returning mine!

 

[moonboy403]

i do feel a strong flow of air like yours.......worked fine for me

 

[joecool]

yeah, i think this is probably how it's supposed to work - marketing spiel notwithstanding. still didn't help my temps much, tho. the attachement mechanism just doesn't guarantee that you'll get a good contact between the hs and the gpu/ram chips. i've read where others have had the same issue. bottom line, it's not worth the price to me and it's going back ... unless somebody here wants to take it off my hands!

 

[CrystalBay]

they need to slightly redesign taht AS5 imo....

 

[MDE]

Originally posted by: joecool
yeah, i think this is probably how it's supposed to work - marketing spiel notwithstanding. still didn't help my temps much, tho. the attachement mechanism just doesn't guarantee that you'll get a good contact between the hs and the gpu/ram chips. i've read where others have had the same issue. bottom line, it's not worth the price to me and it's going back ... unless somebody here wants to take it off my hands!

I'll give you $10 plus shipping.

 

[joecool]

Originally posted by: CrystalBay
they need to slightly redesign taht AS5 imo....

indeed!

 

[joecool]

Originally posted by: MDE

Originally posted by: joecool
yeah, i think this is probably how it's supposed to work - marketing spiel notwithstanding. still didn't help my temps much, tho. the attachement mechanism just doesn't guarantee that you'll get a good contact between the hs and the gpu/ram chips. i've read where others have had the same issue. bottom line, it's not worth the price to me and it's going back ... unless somebody here wants to take it off my hands!

I'll give you $10 plus shipping.

hah, you're funny. cost me $30 + shipping!

 

[MDE]

Originally posted by: joecool

Originally posted by: MDE

Originally posted by: joecool
yeah, i think this is probably how it's supposed to work - marketing spiel notwithstanding. still didn't help my temps much, tho. the attachement mechanism just doesn't guarantee that you'll get a good contact between the hs and the gpu/ram chips. i've read where others have had the same issue. bottom line, it's not worth the price to me and it's going back ... unless somebody here wants to take it off my hands!

I'll give you $10 plus shipping.

hah, you're funny. cost me $30 + shipping!

I'm serious, that's what I'd pay for one, new or used.

 

[oldfart]

If it isn't working properly, RMA it and get one that does.

 

[ponyo]

I thought you bought the Silencer for noise purpose.