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Fan arrangement in 650D

post #1 of 5
Thread Starter 
Hey all, I just built a rig in the Corsair Obsidian 650D with the Corsair H80 as my CPU cooler. I'm getting (what I think) are relatively high temps on my CPU. My CPU cores sit anywhere from 33-37C at idle (ambient ~25C) and were at 53, 56, 58, 58 after 4 hours of load from Prime95 (at stock CPU clocks still).

I'm thinking my fan arrangement in the case might have something to do with these temps. I currently have the case set up with the 200mm front intake, 1x top 120mm intake, and the fan/radiator/fan of the H80 as the lone 120mm exhaust in the rear of the case.

I would like to get my H80 radiator running as an intake, but the fan/radiator/fan was too thick to fit between my case's roof and my mobo. So the rear position is about the only position I can place it without modding my case (which I'd prefer not to).

Should I do a rear intake with just top exhaust? I've read this can worsen things because of the heat from the GPU (I have a GTX570). Are there any good places inside the 650D to mount some additional fans that would help? I have several Yate Loons lying around I could add in for increased airflow.

Just wanting to get some ideas on how to optimize the airflow in this case. Thanks for your time.
TGC-2007
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6300 ASUS P5NSLI EVGA 8800GTS 640MB 4GB Corsair XMS2 DDR2 800Mhz 
Hard DriveOSMonitorPower
320GB Seagate Barracuda 7200.10 Windows 7 Ultimate 2x ASUS 23.6" 1080P LCD FSP Group FX700-GLN 
Case
Antec P180B 
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TGC-2007
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6300 ASUS P5NSLI EVGA 8800GTS 640MB 4GB Corsair XMS2 DDR2 800Mhz 
Hard DriveOSMonitorPower
320GB Seagate Barracuda 7200.10 Windows 7 Ultimate 2x ASUS 23.6" 1080P LCD FSP Group FX700-GLN 
Case
Antec P180B 
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post #2 of 5
First off, I would definitely run a Push/Pull setup on your H60.

Fan<Rad<Fan

Secondly, I would highly suggest a reseat on your H60.. Because even with my H50 and my 2500k running @ 4.5Ghz I idle at those temps and under load is only 55-60.
 
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post #3 of 5
Thread Starter 
Thanks for the reply. It's an H80 and I am using push/pull with the stock corsair fans it came with (I read they were actually quite good). I have also reseated the heatsink 2 times now because I also thought that was the problem. Both times the paste from the time before looked fairly well spread so I think I'm getting pretty good contact. I'm going to need to get some more TIM before I can reseat again, but I'm not totally convinced that's the problem as I've already done it twice very carefully.

I'm wanting to see if I can drop my temps down with a different arrangement of the fans first before I go through the hassle of reseating. Just as an FYI on the temps, it's a 2500k at stock; CPU-Z is reading 3700Mhz and ~1.296V.
TGC-2007
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6300 ASUS P5NSLI EVGA 8800GTS 640MB 4GB Corsair XMS2 DDR2 800Mhz 
Hard DriveOSMonitorPower
320GB Seagate Barracuda 7200.10 Windows 7 Ultimate 2x ASUS 23.6" 1080P LCD FSP Group FX700-GLN 
Case
Antec P180B 
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TGC-2007
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320GB Seagate Barracuda 7200.10 Windows 7 Ultimate 2x ASUS 23.6" 1080P LCD FSP Group FX700-GLN 
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post #4 of 5
Quote:
Originally Posted by tcobb51 View Post
Thanks for the reply. It's an H80 and I am using push/pull with the stock corsair fans it came with (I read they were actually quite good). I have also reseated the heatsink 2 times now because I also thought that was the problem. Both times the paste from the time before looked fairly well spread so I think I'm getting pretty good contact. I'm going to need to get some more TIM before I can reseat again, but I'm not totally convinced that's the problem as I've already done it twice very carefully.

I'm wanting to see if I can drop my temps down with a different arrangement of the fans first before I go through the hassle of reseating. Just as an FYI on the temps, it's a 2500k at stock; CPU-Z is reading 3700Mhz and ~1.296V.
Sorry about that, I'm still half asleep..

And how exactly are you applying it? When you took the heatsink off did you have a lot of TIM left over or spread out on the chip and on the sides?

Also, are your fans running at the highest RPM possible? Check your BIOs to make sure they're running full speed.
 
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post #5 of 5
Quote:
Originally Posted by Dustin1 View Post
Secondly, I would highly suggest a reseat on your H60.. Because even with my H50 and my 2500k running @ 4.5Ghz I idle at those temps and under load is only 55-60.
Well all this is really dependent on your ambient temps. Don't compare your temps to others because based off your ambient temps, what you are experiencing may be perfectly normal.


You might want to consider adding another 120mm fan as intake at the top. It would bring more cool air into the case for the H80 to exhaust.

Rear intake with top exhaust may make your CPU temps better very slightly, but your case temps will probably rise.
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