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N/B cooler push pin improvement

post #1 of 3
Thread Starter 
Most stock northbridge (N/B) coolers work just fine. But some N/B coolers just don't get the job done. Like the Tforce 6100-939, the thing gets too hot to touch! So for mobos like this and/or for overclocking, many of us are interested in aftermarket N/B coolers. As I replaced my stock cooler I came to be quite disappointed in the spring loaded push pins;

Problems with spring loaded push pins on N/B coolers:
1. unreliable cooling due to weak mechanism; won't hold cooler firmly in place
2. must remove motherboard to replace cooler


So I came up with this mod that solves both of the above problems. It turned out so well that I wanted to share the idea so others might benefit from it as well;

Parts needed;
1. 2 - #4-40 screws 3/4" long (length may vary for your application)
2. 2 - #4-40 nuts
3. 2 - insulating washers for screws
4. 2 - 1/4" square plastic screw retainers


Preparation;
A screwdriver slot is needed at the small end of the screw so it can be tightened or loosened from either end of the screw (ie. either side of the mobo so the cooler can be replaced without removing the mobo). I used a rotary tool with a cutoff blade to make a small slot (see first pic).

Also needed is 2 plastic screw retainers. Cut out 2 - 1/4" squares of thin plastic, such as from a milk jug or other retail packaging (I used plastic from a Zalman fan box). Then cut a small 'X' or hole in the middle of each square large enough to press over the screws but still tight enough to hold the screw firmly (see first pic).


Installation;
1. remove the mobo for the last time
2. remove the push pins and the stock cooler
3. insert the screws with the insulating washers from the back of the mobo through the N/B mounting holes
4. press the plastic retainers over the screws from the front side of the mobo
5. clean N/B and apply your favorite TIM in your favorite method
6. install N/B cooler while inserting screws through cooler mounting holes
7. thread nuts onto screws evenly until bottomed on the cooler
8. tighten screws EVENLY (by turning counterclockwise from the front of the mobo) until the cooler is mounted mildly firmly
9. DONE. N/B cooler firmly mounted, cooling efficiently, and removable from the front of the mobo!

This really worked well for my custom cooler and finally my HR-05 (second pic), I really doubt the push pins could even hold the HR-05 up! Hope this works well for you!
LL
LL
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post #2 of 3
Nice work, just be careful not to crack the NB die with the extra pressure.
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Reincarnate
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post #3 of 3
Thread Starter 
Quote:
Originally Posted by TheFlyingWallaby View Post
Nice work, just be careful not to crack the NB die with the extra pressure.
100% agree, need to use careful discretion when tightening (I did). Consider the die size; smaller die - easier to crack. Also ensure the cooler is resting flatly on the die before tightening the screws EVENLY - similar to tightening the lug nuts on a car.
Cooling Tower
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX8300 @ 4.8GHz Sabertooth 990FX R9 270 8Gig G.Skill 
Hard DriveOptical DriveCoolingOS
1TB Samsung F3 LG DVD custom water Win 10 
MonitorMonitorKeyboardPower
Acer 23.6" Acer 20" Logitech Elite Corsair HX520 
CaseMouseAudio
Lian Li Rocketfish G5 Lexicon & Altec Lansing 
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Cooling Tower
(16 items)
 
  
CPUMotherboardGraphicsRAM
FX8300 @ 4.8GHz Sabertooth 990FX R9 270 8Gig G.Skill 
Hard DriveOptical DriveCoolingOS
1TB Samsung F3 LG DVD custom water Win 10 
MonitorMonitorKeyboardPower
Acer 23.6" Acer 20" Logitech Elite Corsair HX520 
CaseMouseAudio
Lian Li Rocketfish G5 Lexicon & Altec Lansing 
  hide details  
Reply
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