Blow holes
athalonhead
Member
I got my new computer running. I havent installed windows yet.I had the multiplier set at 12.0v and the fsb/cpu external at 166mhz =cpu 2000mhz
The room temp was 79f cpu temp was 113
After removing the side pannel cpu temp went to 105/107f
So I think I have bad case flow.? it has 2 exhaust fansCOOLER MASTER SAF-S84-E1 80 x 80 x 25mm SuperFlo Cooling Fan 1400rpm
I have read the air flow guide and it seems like exhaust fans and no intakes is the best way to go.
What i am going to do is cut out the rear fan openings and install fan shrouds
I also am going to install blow holes. I was thinking 2 80 mm fans with grilles.
would one blowhole be good enough and 2 be overkill?or one big fan?
I was thinking using the same coolermaster fans for the blow hole or these 2000rpm fans
http://www.newegg.com/Product/Product.asp?Item=N82E16811999073
Will that be enough? or should I get higher rpm/flow fans? Also trying to keep it quiet
The room temp was 79f cpu temp was 113
After removing the side pannel cpu temp went to 105/107f
So I think I have bad case flow.? it has 2 exhaust fansCOOLER MASTER SAF-S84-E1 80 x 80 x 25mm SuperFlo Cooling Fan 1400rpm
I have read the air flow guide and it seems like exhaust fans and no intakes is the best way to go.
What i am going to do is cut out the rear fan openings and install fan shrouds
I also am going to install blow holes. I was thinking 2 80 mm fans with grilles.
would one blowhole be good enough and 2 be overkill?or one big fan?
I was thinking using the same coolermaster fans for the blow hole or these 2000rpm fans
http://www.newegg.com/Product/Product.asp?Item=N82E16811999073
Will that be enough? or should I get higher rpm/flow fans? Also trying to keep it quiet
0
Comments
3 quiet fans in, 3 quiet fans out.
Cooler temperatures, quieter running, less dust.
Agree, equal or a very slight negative(at the cost of a few more dust bunnies) is most perfered.
I have an all aluminum Cooler Master w/ a top blow hole. Even during gaming, the air coming out of the top is just above room temp.
Cutting out the fan opening and installing a wire guard thing would be best for airflow.
Good heat transfer depends on a number of factors, including the size and efficiency of the heat exchanger, plus rate of flow. The more cool(er) air you blow over the heat exchanger (your heat sinks, etc), the better your cooling. This is not to say you should have no exhaust fans, just that you should not neglect air intake.
A few years ago I experimented with a full tower case that had fan brackets galore. I tried every combination in the book. (Front-to-rear; bottom-to-top; and vice-versa in each case.) One fan blowing in from the side right over the CPU/Video Card area did more good than all the rest of the fans put together. Once I realized this I cut a big honkin' hole in the side and mounted a 120mm 120V fan and got rid of all the others, with the exception of a lone exhaust fan at the rear and another intake fan at the front just ahead of the HD bay area.
Definitely. If you add up all the space of all the pathetic little 1/4" holes typically found in a stamped-out case fan grille you end up with a net area about the size of a Necco wafer. Your poor 80mm fan will be beating itself to death bouncing air off the metal obstructions.
My point is that without enough air coming in, you won't get optimal heat transfer no matter how much you are pulling out. Your point about air settling in odd places like "lower PCI slots that dont need airflow" is well taken, but it works both ways. Without cool air directed to the hotspots you'll end up sucking air from everywhere, leaving possible dead spots where you truly need good airflow.
My example of the 120mm 120V fan blowing cool air directly onto the CPU/Video Card area shows this. All of that air coming in will absorb a lot of heat. Whichever way it finds its way out, it will definitely be removed from the hottest part of the case - the CPU.
"In Low and Out High" is the best solution for the vast majority of cases. I just recommend having a big fan blowing in on the side to make sure that your CPU doesn't end up being bypassed in the process.
While we're on the subject, what do you all think of case ducts? I've never tried one, but it looks like an inexpensive DIY project. A $2 mylar tube and a pair of scissors and you're in business.
If the only way for air to get in is the front grill and the only way for air to get out is thru the fans in the back or the power supply the air Will take the optimal path. It is being forced when the force is applied from the rear of the case.
That tube in the pic wont do anything. Its going to take out the coolest air in the case.
So while were on the subject, what do people think of case ducts and/or "upside-down" style cases.
BUT---- this is only my 1st custom computer so I dont know what really works.
my case has 2 fans spots in the ft for intakes
2 rear exhaust+I think I want a blowhole
I will cut out all the griles
I am going to put the 2 intakes in
both rear exhaust
what should I do for the blowhole 1-80 mm/ 2 80mm/ 1-120?
after I get it back together I will experiment with and without intakes and
see what happens.
these coolermaster fans are 2000rpm would they be good enough or should I go with faster ones-also trying to keep it quiet as possible
http://www.newegg.com/Product/Product.asp?Item=N82E16811999073
120mm = 4.72" = approximately 22.3 square inches of area
One 120mm opening will be larger than two 80mm openings. The only advantage of doing two 80mm fans is that you might be able to put them at opposite ends of the case, depending on how much room there is above your PSU and front drive bays.
That's the only real way to find out. Every case has its own little quirks and I'll be the first to acknowledge that what works well in one set of circumstances might flat-out stink under other conditions.
I just bought and installed a new system in that case shown in the picture, put my 4400+ in it. I'll post my real world results in it soon, but for now, go check this out, it might enlighten you. : )
Toms: http://www6.tomshardware.com/howto/20041020/case-18.html
AnandTech: http://www.anandtech.com/casecooling/showdoc.aspx?i=2219
Looks good in the benchmarks, and other than needing a 3' 4-pin 12v ATX power cable with my A8N-SLI Premium, is incredible.
http://www.newegg.com/product/product.asp?item=N82E16811999139
http://www.newegg.com/product/product.asp?item=N82E16811999614
http://www.newegg.com/product/product.asp?item=N82E16835129016
http://www.newegg.com/product/product.asp?item=N82E16835129030
any opnions on any of these fans?
I'm not really a fan expert, but I'm sure someone will be along to advise you.
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