Duo orb owners look here

[trt740]

I have owned several of these cooler and was wondering does anyone else notice a fluttering or slight cherping sound coming from the fans, one of mine is totally silent but I have tried two different ones on my second card. The first one was horrible and was returned and the second one makes the same noise (very slightly) and not as bad. I can live with the new ones sound but I'm picky as hell and may try a third one. I would like matching cooler on the cards , but I have been looking at the Zerotherma Gx815 since it looks very similar to the Duorb (duorb with one big orb if you will) and has a similar blue led. The Zerotherma doesn't cool as well and in crossfire these babys hit 67c to 70c, with the Duorb coolers, when clocked at 700/1150. The second Duorb I have now, kinda sound like a quiet hardrive spinning.

 

[trt740]

Well gonna send the 3rd Duorb back and get one of these GX815. I don't mind a fan speeding up while gaming but this fluttering on my second 4850 is annoying at idle. So I'm not gonna try a third time. This will go nicely with the one Duorb I do have, that doesn't flutter /rattle, and is silent. http://www.newegg.com/Product/Product.aspx?Item=N82E16835887009&Tpk=gx815 Thermaltake always has had quality troubles with their fans. Too bad these are the best looking coolers I have ever seen.

 

[trt740]

update !!! Bought the Zerotherma GX815 and it is alot bigger than it looks and cools very well. However, when run in crossfire the PCB still gets hot enough to burn your fingers on and thats with either cooler (This concerns me). The Zerotherm has a neat temp sensor which increase the fan speed as you need it and my gpu never went over 70c crossfire. Also when run by it'self the gpu never went over 65c. This cooler is a great alternative to the Duorb or Zalman VF900 and has a faster rpm fan than the G810 , which comes factory equiped on the powercolors 4850.

 

[Fitseries3]

that cooler came on VT 3870s for a while. i think they even started putting them on 4870s now. i thought it ran pretty good.

 

[trt740]

that cooler came on VT 3870s for a while. i think they even started putting them on 4870s now. i thought it ran pretty good.

it does it cools great and is a upgraded version from this cards G810 http://www.newegg.com/Product/Product.aspx?Item=N82E16814131118 ,but in crossfire the PCB will burn your fingers from both cards running like space heaters even though the gpus are cool. The votage regulator heatsinks are hot as hell aswell. When running a single card no problem, but dual cards are hot hot. It matches the dual orb step for step and compared to the stock cooler is great at (28.00 after a rebate). Its very large aswell, larger than the Zalman and almost as big a the orb. http://www.newegg.com/Product/Product.aspx?Item=N82E16835887009&Tpk=gx815 these 4850's are just hot mothers. Forgot to mention these cards idle in the 38c to 40c range.

 

[Bytor]

This is just a theory.

This issue could stem from the fans (props) being is such close proximity to eachother.

I spent 24 years in the air force working and flying on C-130 aircraft and they also had a problem as did many multiengine aircraft with Audible Propeller Beat. This is due to different propeller's whose r.p.m. are close, but not precisely the same. On aircraft they use a propeller synchronizer to eliminate this problem.

It may also be the problem you are hearing in these 2 small propellers in such close proximity to eachother.

Now this is just a theory I have with past experience with turboprop aircraft.


Or the fans are just out of balance.,..

 

[trt740]

This is just a theory.

This issue could stem from the fans (props) being is such close proximity to eachother.

I spent 24 years in the air force working and flying on C-130 aircraft and they also had a problem as did many multiengine aircraft with Audible Propeller Beat. This is due to different propeller's whose r.p.m. are close, but not precisely the same. On aircraft they use a propeller synchronizer to eliminate this problem.

It may also be the problem you are hearing in these 2 small propellers in such close proximity to eachother.

Now this is just a theory I have with past experience with turboprop aircraft.


Or the fans are just out of balance.,..

might be but I think this cards are just hot.

 

[Bytor]

Never know.....

I used a pair of Zerotherm GX810's and they did a great job till I replaced them with water. Loved the built in temp sensor that works very well and the red LED's on the 810's...

 

[trt740]

Never know.....

I used a pair of Zerotherm GX810's and they did a great job till I replaced them with water. Loved the built in temp sensor that works very well and the red LED's on the 810's...

the G815 is just a upgraded fan and added a blue led.

 

[Fitseries3]

man o man... my 4850 is GLOWING red hot keeping my 24" LCD lit even in 2d mode with the fan at 45% 24/7 and great airflow in my case. i even have a 120mm fan blowing directly on it.