Tips on replacing the processors on a CMP 4,1?

[TECK]

Hi,

I purchased two X5690 processors for my CMP 4,1 (firmware updated to 5,1) and delided them. Can you please detail few tips about the torque I need to apply to the screws (number of turns) or any other important details? I have a long 3mm T-Key and purchased some Arctic Silver 5 paste, not sure if this is the best choice and what shape to spread it on the processors (pee, line?). Thanks for posting your advice.

Floren

 

[Squuiid]

As long as you have de-lidded then you're fine. Just tighten as normal and all will be well.
As for paste, I use a credit card and spread, but a blob also works.

 

[fhturner]

Yeah, what Squuiid says— tighten down as usual. Unlike (I assume) the washer method, when you’ve delidded, there is not a certain number of turns, you just tighten until they stop. I personally make 2 passes in a cross-cross pattern, first counting 7-8 “twists” (not full turns, just twists of my hand), then another 5-10 twists on the second pass until they stop.

For thermal compound, on the delidded CPUs, which have a smaller area to cover, I make a line down the center length-wise, and that seems to do fine.

 

[kohlson]

Here's the official guide.
There are details on how to replace CPUs.

 

[TECK]

@kohlson thank you for the useful link. The processors replacement starts at page 156, with this information on page 160:

To position heatsink screws, lightly tighten them (4 lb.-in. or 0.452 Nm torque) in order shown, using no more than two turns of driver per screw.

 

[fhturner]

To position heatsink screws, lightly tighten them (4 lb.-in. or 0.452 Nm torque) in order shown, using no more than two turns of driver per screw.

Hmmm...not sure exactly what "finger tight" + 1/4 turn would be like. The screws essentially "freewheel" until they get to the bottom of travel/tightening, then they stop. Not like an oil filter on a car, where it gets snug and then you go 1/4 or 1/3 more to compress the gasket.

The very first time you undo the heatsinks, you usually have to kinda "break free" the screws from their fully tightened position. What I do is just retighten to this point, using 2 passes in criss-cross fashion. I make sure not to over tighten, of course. I use a 3/8" drive 3mm hex wobble-head socket, but only use the ratchet to undo the screws (if needed)— I turn the socket by hand to reattach.[/user]