Guide to Modding Antec 620 Cooler Using Minimum Amount of Zipties and Modded MountStep 1: Remove the old cooler and prep the chip (Click to show)
Like the title says, remove the old cooler carefully and clean off the chip with 91-99% alcohol. Make sure the chip is very clean!
Step 2: Lap the Antec 620 cooler surface (Click to show)
Step 3: Get the AMD mounting plate (Click to show)
The antec cooler is great. However, the bottom of the cooler isn't so great. It is a very concave surface. Meaning the center of the surface is higher than the rest of the area. With a heatsink, you want the entire surface to be completely flat. Take 400-600 grit sand paper and sand the surface back and forth on the glass surface. This will begin to remove the concave surface and make the cooler head flat. You can stop after you think your sanding all the surface of the copper head. Next take 1500-2500 grit sand paper and begin to sand the surface till it removes all the scratches in it and creates a mirror finish.
The AMD mounting plate seemed to work better for my GTX 560. Basically what you want to do is cut off all of the L shaped bracket material for where the normal mounting screws would go. This should leave you with a nice round disc without much material going down toward the chip and PCB area. I used snippers for cutting the metal, that worked best for me, you can decide how you want to cut them off but they need to be cut or else the cooler won't properly contact the chip because of these L brackets.
Step 4: Get 4 (Click to show)
Step 5: Test the card and make any necessary adjustments (Click to show)
These zip ties go through the normal screw holes on the PCB.
The zip tie should be tied to the AMD bracket mount after it has been cut. Basically you want to zip the tie with the long end on the outside of the bracket and pointed down.
Then once you zip it tight, fish the 4 zip ties through the holes on the PCB.
Next, you want to take 4 more zip ties and basically use the lock ends on them as a sort of nut for the system. Do not zip the nuts tight or else you won't be able to attach the pump to the cooler. That will come later.
Once you have 4 of the zip ties through the PCB and secured by 4 other zip ties of the other end you can put thermal paste on the chip and mount the pump. Flip the card over and be careful not to swivel and twist around the pump on the chip, I had a problem with this but you might be better at it. Once you have the pump on the chip and the bracket secure to the pump tighten the zip ties from the other end of the PCB so that they act as nuts holding the bracket and pump tight to the chip and PCB.
Once that is complete you can trim the excess of the zip ties and make sure the bracket and pump is secure. You should be able to twist the pump very little on the chip after everything is tight, that is fine. I used pliers and pulled gently on the zip ties up and pushed the nuts down to make sure everything was nice and tight.
The Antec 620 instructions should detail you with how to hookup the fan and pump. Make sure you don't ever run the pump under 100% power. And mount the radiator blowing out of your case in however orientation you need it. I prefer push-pull but its up to you. You should have crazy low temps anyway so your fine.
I don't have any evidence to suggest that if your chip gets over 60C with this Antec 620 mod that you should seriously consider either repasting the chip and resetting the cooler or checking to make sure everything is ok with the pump. You should have a great result and that should be it!
DON'T FORGET A VRM FAN!!!!
Add this to the OP! Guide Hijack!Edited by Cakewalk_S - 2/4/12 at 6:53pm