..:: The Shroud ::..

When you get to the point where you're color coordinating the interior components of your computer it may be time to seek professional help.

Others will know more, but my guess is that the shroud is necessary to properly direct the air flow, even under normal conditions.

If you take the shroud off you will not get proper cooling. The direct heat off the CPU keeps the temp sensitive case fan running at a higher speed drawing more air over the hard drive etc. The CPU will also not be properly cooled under load and will power down. If you Powerleap replacing the shroud/heatsink with a CPU fan/heatsink the case fan still runs slower letting case temps rise. Replacing your PSU with a PCP&C turbo cool PSU helps this situation. I am running a modded case and to keep temps as low as possible (with lighting, raided hard drives etc.), I installed a 120mm intake fan. It fits at a 45 degree angle under the hard drive cage over the floor vent holes. It increases the overal air intake draw through the front panel vents as well due to the increased internal air flow in the case. And no, it is not a quiet Dell anymore. It sounds like a gaming machine although the intake fan can be powered down during normal use.

UPDATE On intake fan: 

After many more hours of testing with four temp sensors (GPU,CPU, HDD's and ram). The intake fan works at 1200RPM (also using a PCP&C turbo PSU fan) and provides minimal extra cooling vs. no fan. Increasing the speed to 2500 RPM the fan creates enough turbulence that the ram and hdd's run approximately 3 degrees C hotter with minimal cooling improvement for CPU and GPU. Conclusion: without many hours of testing, adding fans etc. can actually do a poorer job of cooling vs Dell's original shroud system or the next step to Powerleaps without the shroud that will add a small amount of heat to the case temps. It is extremely difficult to get optimal cooling solutions that benefit all components. Adding a direct hard drive case fan and a blow hole may be the answer, but I am staying with the set-up I have now (ie without OC'g the CPU/FSB etc there is no need). Leaving the PCI slot below the vid card empty seems the best cooling solution for the vid card. Going the power leap route on the D8100's does elimintae the hot spot under the shroud (replaced ny CPU heatsink/fan) where heat collects from the vid card.

Message Edited by dogin on 12-15-2003 12:42 PM

Message Edited by dogin on 01-03-2004 07:37 AM

The case fan runs based on heat sensed. If you reduce the heat (direct off CPU), it runs slower until the case heats up. So your internal case temp increases. My case fan never did get up to full speed, but the case temp increased. Although the computer will run, components longevitiy are directly related to temperatures. The hard drives seem to be affected the most. I won't add anything else as you need others opinions.

Message Edited by dogin on 12-15-2003 12:49 PM

  Ok, so it looks like my option are:

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1.  Keep the shroud on, and forget about this post.  (NO)

2.  Take out shroud and heatsink, and install a heat sink w/ a fan, as well as a Turbo Cool PSU.  (EXPENSIVE)

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Now, I have some more thoughts:

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Why will adding a fan with a heat sink decrease the speed of the case fan?

Are there any options besides the two listed above?

Are there any other thoughts on this topic at all?

Thanks in advance to all that post !!! 

 

<< >>

I would not remove the shroud, it is neccessary for proper air flow. Just paint it blue.

Just remove the shroud. It's useless............................

P.S. Just duct tape the case fan to the heatsink and install another 92mm fan where the stock nmb fan used to be so that would run at a constant speed and you dont have to worry bout sensors either it's hot or not.........

aight.................. Does that cover all the paranoia in here...............

 

WIMPSSSSSSSSSS>>>>>>>>>>>>>>>>>>>>>>>>>

  Okay, tell me if this sounds like a good plan.

Some way another, whether it be duct tape or something else, I will attach the temp. sensitive fan to the top of the heat sink.

I will also then install another 92 mm fan into the bracket from which the temp. sensitive fan was removed.

This way, the case still gets plenty of circulation, and the processor gets plenty of airflow, too!

Does anyone see any errors in the plan?  Thanks in advance to posters!!! 

<< >>

thunderbyrd24,

                            That would be a very nice setup which i would be trying for myself once my fans arrived from tigerdirect. So the fan that has a sensor on top of the heatsink would have to adjust the cooling each time the cpu gets hot. The other 92mm fan which runs continously would have to dissipate the heat at a constant speed allowing no sensors just pure 100% cooling...............

Im thinking of using crazy glue instead of using those arctic silver on my Geforce fx 5200. Theres about half an inch of that adhesive not allowing the heat to transfer to the heatsink making unoverclockable. I just installed a socket 370 heatsink and fan and krazy glued it into my Geforce2 Mx200 on my old computer and i gained about 95Mhz on core clock and 105Mhz on the memory.

I never knew Krazy glue are so effective than those arctic silver that most people use.

Just my 4cents..........

Dont crazy glue the 92mm fan into the heatsink or else you'll have trouble removing it afterwards.

92mm fan in my opinion is a bit too large for the heatsink. I duct tape a 80mm fan and it fits perfectly fine. Although i had another 80mm fan from my old PSU that i wasnt using anymore and used it as an adapter to my 80mm fan so once i duct tape it into my heatsink it wont create a dead spot which most people overlook into in the past and cools the center of the heatsink much more than the oustide having direct air contact into the cpu.

70mm width and 80mm length

goodluck and have fun modding.

Dont forget to improvise

No duct tape will not work! Nor Super Glue! The Dell's have a proprietary fan connection on the mobo. You would have to solder the connector on the new fan. The new fan would have to be the same power draw etc etc etc. The Dell heatsink is designed for air to blow through it and not drawn away from it like a top mounted heat sink fan. You are getting what was intended as sarcasim from one poster for your efforts and if you follow that advice, you certainly will end up with a blue colored pile of smoking junk!

Message Edited by dogin on 12-17-2003 09:00 AM

 Okay, I have just a few more things to discuss.

Does anyone know how many RPMs or CFMs the case fan gets?  If it's not much, I may just get a fan to replace it entirely!

If I were to krazy glue a fan to the heat sink, the fan isnt going to melt or anything like that, right?

Does anyone know the length and width of the heat sink?  I'm not too lazy too measure it, I'm just at work.

Thanks in advance to all posters!!! 

 

<< >>

Thats not what were tryin to discuss here. What he meant was adding another 92mm fan for the case and connecting it into a 4 pin female to 3 pin fan adapter. It doesnt have to be the mobo. The NMB fan will stay on the mobo.

So dogin what did you think he was goin to connect his other 92mm case fan?

We all know there is a blue screen of death hidin on that 3 pin mobo fan connector.

The only way to connect another fan is to purchase a $1 fan adapters.

Hope you got ma point, you makin everyone worry.

aight

 Okay, those last few posts got me a little lost.

Let me see if I can run this whole operation by you guys.

I am going to have 2 NEW fans in my computer.  I am going to disregard the original.

I am going to place a 92mm fan on the existing fan bracket, found on the rear wall of the machine.

I am going to DUCT TAPE an 80mm fan to the top of my heat sink.

This brings me to, hopefully, two final questions.

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1.  Where is each fan going to get it's power from?

2.  Which direction should the air flow be from the heat sink fan?

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Sorry if I sound a little stupid.  You guys helping me are great!!! 

 

<< >>

  Alright!  I think I got it now!  Tell me if I have it right...

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I remove the shroud, duct tape an 80mm fan on top of the heat sink, and attach it to the power supply via a 3 to 4 pin connector.

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As for the 92mm, I guess I'll just paint it blue, seeing as I have no other options really.

Henesseynalert, if you can, I'd like to see a shot of your fan setup, or any other 8100 mods that you have.

Thanks to everyone for their help!!! 

Thunderbyr,

                   I repeat dont replace the 92mm stock fan. Leave it as it is. 80mm fan on top of heatsink and it should be BLOWING AIR INTO THE HEATSINK.

Reason is that if you remove the 92mm fan from your mobo you'll get errors and blue screen so you wouldnt want to do that.

Hopefully your 80mm fan came with 4pin molex or 3pin then you can easily connect them via PSU connectors 4 pin. If you have the 3pin fan connector you can purchase an adapter which only cost about $1 and you dont need to connect it to your mobo.

hope you got everything right.  Its as easy as if you want it to be.

happy modding and keep those pc runnin cooler...............