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Haf X owners, colder temps when adding 2nd 200mm fan on top?

post #1 of 62
Thread Starter 
Okay guys, I'm not sure if I am crazy or doing something wrong here...but here is my current fan setup

- factory intake 230mm front fan
- factory intake 200mm side fan
- factory exhaust 200mm top fan
- optional exhaust 200mm top fan
- factory exhaust 140mm rear fan
- optional intake 140mm fan mounted where the 5.25 bays are (three of them mounted inline)

Here is a quick picture for reference on the 140mm fans in the 5.25 bays

img0318v.jpg

now when I do prime95, I am actually seeing HOTTER temps with the optional top 200mm fan in place (mounted as exhaust)....I thought I was crazy so I quickly did back to back testing without any variations in ambient.....nope, I was getting hotter temps with the optional fan there....

Is anyone else experiencing similar results? Is it because I have 140mm intake fans where the 5.25 bays are? Maybe the optional 200mm fan on top is sucking away some of the cold air from the 140mm fans I mounted in the front?

Let me know....thanks!
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post #2 of 62
because of the "heat rises" principle, I would exhaust the top and upper rear fans. I have no idea why your getting hotter with that many fans.
post #3 of 62
Quote:
Originally Posted by t0adphr0g;12392493 
because of the "heat rises" principle, I would exhaust the top and upper rear fans. I have no idea why your getting hotter with that many fans.

The fans may be creating an air pocket by blowing the air in different directions. If the air doesnt have a clear path from entry to exit it can get stuck in the case and continue to heat up.
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post #4 of 62
Maybe the hot air from the graphics card is drawn into the intake of the CPU cooler. Without the front top intake fan, the hot air from the GPU is drawn towards the exhaust side of the CPU cooler.
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post #5 of 62
Thread Starter 
Quote:
Originally Posted by Riou;12392570 
Maybe the hot air from the graphics card is drawn into the intake of the CPU cooler. Without the front top intake fan, the hot air from the GPU is drawn towards the exhaust side of the CPU cooler.

my GPU is a reference gtx 570...it doesn't spew hot air into the case...its an external exhaust

and what do you mean by the highlighted portion?
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My System
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Samsung 840 PRO 256gb Noctua NH-D15 Windows 8.1 PRO 64 Bit Dell UltraSharp U3011 30inch 2560x1600 
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post #6 of 62
Thread Starter 
Quote:
Originally Posted by t0adphr0g;12392493 
because of the "heat rises" principle, I would exhaust the top and upper rear fans. I have no idea why your getting hotter with that many fans.

my top fans are exhaust fans....i'm not sure if you read my first post?
My System
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Samsung 840 PRO 256gb Noctua NH-D15 Windows 8.1 PRO 64 Bit Dell UltraSharp U3011 30inch 2560x1600 
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My System
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Samsung 840 PRO 256gb Noctua NH-D15 Windows 8.1 PRO 64 Bit Dell UltraSharp U3011 30inch 2560x1600 
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post #7 of 62
You might be getting higher temperatures from the optional top fan prematurely exhausting fresh air from the other intakes before it reaches your other components.
    
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post #8 of 62
Thread Starter 
Quote:
Originally Posted by Siegfried262;12399958 
You might be getting higher temperatures from the optional top fan prematurely exhausting fresh air from the other intakes before it reaches your other components.

yes, thats what i was thinking too....i am sure others with haf x's have done a similar mod to their case....i was wondering what inputs they can give me
My System
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Intel Core i5 4670k 4.6GHz 1.24v Asus Maximus VI Hero EVGA GTX 780 ACX x2 SLI 16gb G.Skill Trident X 2400mhz CL10 
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Samsung 840 PRO 256gb Noctua NH-D15 Windows 8.1 PRO 64 Bit Dell UltraSharp U3011 30inch 2560x1600 
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My System
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CPUMotherboardGraphicsRAM
Intel Core i5 4670k 4.6GHz 1.24v Asus Maximus VI Hero EVGA GTX 780 ACX x2 SLI 16gb G.Skill Trident X 2400mhz CL10 
Hard DriveCoolingOSMonitor
Samsung 840 PRO 256gb Noctua NH-D15 Windows 8.1 PRO 64 Bit Dell UltraSharp U3011 30inch 2560x1600 
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Seasonic X-850 80+ Gold Cooler Master HAF X Logitech G602 Corsair Vengeance MM200 
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post #9 of 62
One thing you might want to try if you have spare time. Is turning off your first big top fan, blocking that port, and reversing that second top fan to intake.

Sounds crazy but a couple of users (Ehume comes to mind) have tried similar concepts with other cases and experienced a decent drop in temperatures. I think the idea with that is the top fan above the heatsink exhausts soome of the air before it can travel completely through the heatsinks and by having a second top fan intaking with the first top fan blocked off (so you're not pulling hot air that rises naturally) you're providing fresh air for your heatsink that travels all the way through and out the rear exhaust.

Just an idea if you have the time to spare, obviously results may vary between cases and situations.
    
CPUMotherboardGraphicsRAM
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Samsung 830 256gb  1TB Western Digital Caviar Green Arctic Cooling Freezer 11 LP Windows 8 64-bit 
MonitorKeyboardPowerCase
Viewsonic 23" IPS Clacky keyboard from thrift store. Rosewill Hive 650w Coolermaster HAF X RB 
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveCoolingOS
Samsung 830 256gb  1TB Western Digital Caviar Green Arctic Cooling Freezer 11 LP Windows 8 64-bit 
MonitorKeyboardPowerCase
Viewsonic 23" IPS Clacky keyboard from thrift store. Rosewill Hive 650w Coolermaster HAF X RB 
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post #10 of 62
Quote:
Originally Posted by Siegfried262;12399958 
You might be getting higher temperatures from the optional top fan prematurely exhausting fresh air from the other intakes before it reaches your other components.

It's much like the ATCS 840 case in that regard which I also have (what a beast - lol!) and by my research people who have these are saying much the same as the OP with his HAF X case.

It's probably better to disconnect the 200mm fan closest to the 5.25" bays to get more positive front to back airflow.
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