Dual fans PSU's ...

Whats the best way or (how you have yours) to have them face ? ie;
having it blow down ( which it would be blowing right at the CPU cooler , would it interfere with CPU cooling ?)
or facing up ( which I would need then to cut or drill holes in top of PC case because there's only a thin space between PSU and case) but it would give me more exhaust and probably more noise :eek2:

I have a cheap little house thermometer stuck on the inside of side window on case and when I had just my old PSU ex.fan and one ex.case fan the Temp. would get to 100 deg.F. or higher playing a game , so I put a fan at bottom intake and now it only gets to about 95 deg.F. ,
so was wondering if having this new PSU with dual fans pulling out would make much difference to put up with the extra noise ?

Thanks for any help guys . :thumbs:

here's a link to the PSU ;
http://www.cwt.com.tw/CwtEng/product.../cwt-450bd.htm

Air in from the bottom front, out at top rear.

If you are talking about the secondary fan on the bottom of the psu..and as far as I know, the bolt patterns only align one way..that fan will be pulling air out of the case right over the top of the processor and helping the exhaust fan at the back push it out of the case. That fan does not blow down, it sucks out.

Quote:

---

Originally Posted by jitBob

Air in from the bottom front, out at top rear.

---

Ya , didn't know that fan blow'ed in the PSU box , oh well .
Its in and mounted like it meant to .
At least now when CPU goes under load you don't hear the fans slowing down :thumbs:
Other PSU was a (I guess cheap) OKIA 420watt .
Will see how PC acts after being ON awhile and playing games .

Quote:

---

Originally Posted by GrandDad

Will see how PC acts after being ON awhile and playing games .

---

Joining the COH bunch????

Quote:

---

Originally Posted by ilovetheusers

Joining the COH bunch????

---

I wished :sad:

Quote:

---

Originally Posted by jitBob

Air in from the bottom front, out at top rear.

---

Yeah, as you know, hot air rises. So, you just help it along the way by drawing in cool air at the bottom and exhausting hot air out the top. The only drawback to this is that most CPU's are close to the floor and dust particles, hair, etc. will get sucked into the bottom fan clogging it up. You can install a fabric filter which will need to be kept clean on a regular basis or place the CPU up off the floor.

There are a couple of old HP big main frame systems who use a big bank of cooling fans at the top blowing down and another big bank of fans at the bottom...also blowing down. This offsets the "heat rises" routine and also keeps the system clean by not sucking in junk at the bottom. In fact, it blows debris away from the bottom of the system.

Here's a contrary view. Since CPU fans blow down toward the cpu I have found I can get better cooling with the rear fan blowing in. That way cooler outside air is blown over the cpu hsf and is blown down on the cpu.
This method increased the case temp but lowers the cpu temp.
In this type of setup a dual fan power supply would help by ejecting more of the warm case air out the top.

People tend to forget about other components, like HDD, VGA and well basically everything in the case need a bit of cooling nowadays, so techs, keeping the case temp down is pretty important, with todays components.

Quote:

---

Originally Posted by techs

Here's a contrary view. Since CPU fans blow down toward the cpu I have found I can get better cooling with the rear fan blowing in. That way cooler outside air is blown over the cpu hsf and is blown down on the cpu.
This method increased the case temp but lowers the cpu temp.
In this type of setup a dual fan power supply would help by ejecting more of the warm case air out the top.

---

Or you could get one of the newer types of cases that have the "heat tube" as I call them that allow for the cpu to pull cool air from outside.