|
|
Post by spazsterian on Mar 26, 2012 12:05:07 GMT -8
On my haf 932 I use the front to pull in, the top and rear to pull out. The side was overkill for what i'm doing, but i may reconsider that come summer. Idea is to not create a tunnel or vortex. Just like a spray booth...air in one way air out another. I know that some cases use the side to pull cool in..specially if it has a guide directing it directly to the cpu.
|
|
|
|
Post by zedarchitect on Mar 26, 2012 12:32:09 GMT -8
Not sure how critical it would be but you probably want to balance the intake air CFM and the air discharge CFM. If anything I would go higher on the discharge but only slightly (causes negative pressure). This is just seat of the pants based on what I have learned from designing data centers. Just to clarify I worked on the buildings and not the equipment so i am basing this on those mechanical engineering concepts.
The point is it is best to have a near equal amount of air in and out. Too much of one or the other would put unnecessary strain on the fans.
|
|
|
|
Post by spazsterian on Mar 26, 2012 13:36:31 GMT -8
+1 to what zed said
|
|
F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
|
Post by F1Fan07 on Mar 26, 2012 13:48:51 GMT -8
Front and side suck - back, PS and top blow. I always check airflow with a piece of tissue. That ensures that some fans aren't being overpowered. Also, if the unused expansion slot covers are the slotted type then use the tissue test to check the airflow. Mine were a path for sucking the hot power supply exhaust back into the case... fixed that with some electrical tape  |
|
Seahawks1Fan
Race Director
rF name: Jason Hawks
Posts: 5,614
|
Post by Seahawks1Fan on Mar 26, 2012 14:06:24 GMT -8
On the left side of the case, there is a spot to mount 2 small fans next to each other. I can have 1 pushing and pulling. The other fan mounts behind the motherboard behind the processor. Should I pull air out there?
I'm so confused now.
I'm just a cave man!
|
|
F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
|
Post by F1Fan07 on Mar 26, 2012 14:09:38 GMT -8
Stolen from the web... this is how I've always done it. Basically your exhaust is top, back and power supply. Everything else is intake.  |
|
Seahawks1Fan
Race Director
rF name: Jason Hawks
Posts: 5,614
|
Post by Seahawks1Fan on Mar 26, 2012 15:45:01 GMT -8
Thanks. Much easier to understand for my simple mind.  |
|
|
|
Post by zedarchitect on Mar 26, 2012 16:04:22 GMT -8
I don't agree with the rear intakes above. You want to extend the path of the air so that it moves across components and cools them by drawing heat. Having an intake right next to a discharge allows the air to short circuit doing next to nothing. So Hawks, don't have two adjacent fans in opposite directions. I'll refer again to data center design since I am very familiar with it from 6+ years of designing the buildings they reside in.
In a properly designed DC, you have rows of server cabinets. They are setup so the fronts of cabinets in adjacent rows face each other and the rear of cabinets face each other. This creates cold and hot aisles. All equipment mounted in the cabinets pull air from the front which is in the cold aisle and exhausts through the back which is the hot aisle. The key is to have no where for the cold air to go but through the equipment. If the equipment let in cold air from the sides the air would enter and exit without having a chance to exchange the heat from components. I would focus on intake at the front (down low if possible) and out the back (up high if possible). Also, avoid any other heat generating equipment near the front of the case. You want the intake air as cool as possible.
I may be over complicating it but years of being around mechanical engineers teaches you these things. They used to run CFD models to test designs since weird things could happen and all rooms are different. Just like Spaz mentioned, you can wind up with vortexes and such.
|
|
F1Fan07
Race Director
Ludicrous speed. Gone to plaid.
Posts: 9,366
|
Post by F1Fan07 on Mar 26, 2012 16:27:16 GMT -8
I don't agree with the rear intakes above. Yes, rear intake is very, very wrong (which is why I covered my slotted expansion slot blanking plates). I couldn't find a clear picture that explained what I wanted to say (you can only spend so much time on the Google while at work!) but that's supposed to show side intakes in the missing side panel and an inlet in the bottom (for cases that have a bottom grille for the PSU). Bottom mounted power supplies have confused things because now the top and bottom of the rear panel is exhausting. I've always believed that cold air flows in over the hard drives then up to the CPU and out at the rear. Side fans are providing extra cool air direct to the cards. In fact I don't use side fans... my fans are balanced such that air is drawn into the side through the grille. |
|
Dan W.
Race Steward
Posts: 5,378 
|
Post by Dan W. on Mar 26, 2012 20:28:35 GMT -8
Thanks. Its amazingly quiet to. Came with a back fan pushing air in and an exhaust fan on top blowing it out. Dumb question from a newb pc builder here - when I install additional fans on the sides, should they also be pushing air into the case? Rule of thumb is, front and sides pull in, Back and top push out. Reason, Front fans also cool HD's, Side fans cool Mobo, ram and cards. Most rear fans are close to top, and we all know where heat goes. Top fan should be self explanatory. If your rear fan is pulling in, you might want to revers it, especially if it's mid way up or at the top, because all it is doing is supplying cool air to the top fan and not airing the case. |
|
Seahawks1Fan
Race Director
rF name: Jason Hawks
Posts: 5,614
|
Post by Seahawks1Fan on Mar 26, 2012 20:50:52 GMT -8
Checked again tonight and rear and top are pulling air out. I mounted the two fans on the left side and are pushing air in. The fan of the right side (behind motherboard) was DOA, so I'll return it tomorrow and get a new one. I'll have it push air in as well.
May be overkill on fans, but can't hurt if it stays even cooler.
|
|
|
|
Post by spazsterian on Mar 26, 2012 21:26:56 GMT -8
I just scored another HAF 932 still sealed in the box here off craigslist for 75 bucks so i'll be moving the stuff i got from lawyer out of my old school server case into it and putting them both side by side on the desk negating my side fans all together.. will be going push from front to pull from rear on both these. wife's gonna shit seeing two monster black cases on the desk ..but oh well, least it be quiter then the 6 fans in the server case that she complaining about..lol Now if only i could get a case of 256 gb sammy SSD's to fall of a truck  |
|
|
|
Post by zero7159 on Mar 30, 2012 21:46:01 GMT -8
I was at Fry's Electronics tonight and there was one Nvidia 680 GPU sitting on the shelf. I held it in my hands, but did not pull the trigger....  |
|
|
|
Post by zero7159 on Mar 30, 2012 22:36:30 GMT -8
Well, I caved. After 5 years with the same basic PC (aside from upgrading the video card and the power supply), I decided to upgrade. I purchased all of the components and built it myself (first time I've tried this - I'm now officially a "geek"). Went with with Intel i5 2500k processor, ASUS Maximus IV Gene-Z motherboard, CORSAIR Vengeance 16 gb RAM and the Antec Eleven Hundred full case. I used my existing power supply and hard drive to save a few bucks. Also ended up having to buy a new DVD reader/writer as my old one wasn't compatible with the motherboard (that's how old my stuff is). To my surprise, it booted up and seems to be working well. Congrats Hawks on the build. Love the CPU and GPU. I also like that case. Its a good value. Post some pictures and data. Building two computers last year was a hoot for me. I really enjoy this stuff!!! |
|
|
|
Post by zero7159 on Mar 30, 2012 22:40:26 GMT -8
I just scored another HAF 932 still sealed in the box here off craigslist for 75 bucks so i'll be moving the stuff i got from lawyer out of my old school server case into it and putting them both side by side on the desk negating my side fans all together.. will be going push from front to pull from rear on both these. wife's gonna shit seeing two monster black cases on the desk ..but oh well, least it be quiter then the 6 fans in the server case that she complaining about..lol Now if only i could get a case of 256 gb sammy SSD's to fall of a truck Nice find Spaz. That HAF 932 is a nice looking case. |
|
