HI everyone,  
 
I saw on some pc case, side vents with fan and attached to this fan there is some tube to direct the intake  directly to the mobo component you want. I tried to find canadian store where I can order that kind of kit, the grill, fan (90 or 120mm) & duck, but I've found nothing. I need that beacause in summer it's really hot in the room where is my pc and I think It will be a good idea to have that intake directly blowing air on my ram to cool down everything. My case and rig are in my signature.  I have all the fans 2 intake (front back) 2 exhaust on the top.
 
Thanks for your help.  
 

If you are handy you can cut a hole the size of a 80mm or 92mm or120mm fan with 4 mounting holes drilled and then connect a fan to create a blowhole or passive duct to cpu but Im not sure its as effective as better front to back airflow. I think it creates some cross flow turbulence which can disrupt other flow patterns. see if you can add a fan in the front or speed up the ones you have allready. BTW cases are designed to flow front to back/top. Your psu is exhasting to the back so your rear case fan should be also exhausting.

+1 for the duck
 
 
Before spending any $$ I'd suggest you run some temp monitoring software to see if your close to the limits though.

Drain pipe and dremel!
 
Sorry, don't know, although I know what you're talking about.

Heat rises so cases are designed to take advantage of this.  As the other poster stated the back fan should be exaust but I'm wondering what case you have that has 1 back and 2 top and only 1 front fan because that seems like a poor design to me.  
 
If your case has a lot of passive ventilation like the Antec 900 or Cooler Master Stacker cases then air has plenty of places to enter the case so positive/negative pressure really doesn't exist regardless of fan direction.  More traditional cases with solid side panels (except for vent or fan holes) and solid drive bay covers have more limited area for air to enter so closer attention should be paid to balancing air capacity and flow.
 
If the RAM is your concern you could look at a product like this
http://www.coolitsystems.com/index [...] Itemid=162
This fits over any RAM and does a decent job of cooling it with a minimal cost.

Your TJ-09 case should be ok.  Directing air is probably not as effective as simply increasing the air flow.   I would first install 120mm exhaust fans in the upper mounts.   Cooling air should flow from front, bottom, and side  intake to rear and top exhaust.   The next step would be to change some of the intake fans to higher rpm models.   It will be noisier due to high rpm"s, but flow would increase.   Ram does not generally need cooling; don't worry too much about that.  Lastly, have you reduced wiring clutter to allow free air flow?

I didn't look at your configuration before I posted but Silverstone makes very good cases with plenty of ventalation built in.  You should first switch the back fan to exhaust because the way you have it configured the back fan is blowing in and the air is going directly out the top.  You could also look into a single high CFM fan in the front and 3 lower CFM fans for the top and rear which will balance air flow.

Something like this in the front
http://www.newegg.com/Product/Prod [...] 6835185006

And 3 of these in the top and rear
http://www.newegg.com/Product/Prod [...] 6835185004

This would give you negative pressure but the vents built into the sides and back of the case would balance it out and give you good airflow.