|"I removed the heatsink and the CPU came off with it because I had lined the processor with a good amount of paste."|
What you are supposed to do is unclamp the heat sink, press straight down HARD on the heat sink, directly towards the cpu, and wiggle the heat sink back and forth until the bond to the cpu breaks loose !!
If you unclamp the heat sink and pull straight up on the heat sink WITHOUT having done that , the CPU will ALWAYS be stuck to the heat sink, and you're pulling the CPU out of it's socket without it's ZIF socket lever having been released - doing that can break off some of the pins on the bottom of the CPU, or damage the ZIF (Zero Insertion Force) socket, or both !
Heat sinks for CPUs
- come with a thermal pad - sharply defined definite edges, a consistent thickness of thermal material - it's already stuck onto the heatsink - you remove protective paper or plastic on the bottom of the pad itself just before you install it on the cpu.
- or - come with a capsule of thermal compound or thermal grease, that the installer applies a small amount of
- or - the installer may have re-installed the heat sink and used thermal compound or thermal grease, or have chosen to use thermal grease or thermal compound the new heat sink did not come with.
(Replacement thermal pads are relatively hard to find.)
If a thermal pad or thermal grease was used between the heat sink and the cpu, the heat sink WILL come unstuck from the cpu, when you unclamp the heat sink, press straight down towards the cpu while you wiggle the heat sink back and forth.
If thermal paste (a.k.a. thermal compound) was used, the kind that has additives in it, sometimes it hardens over time and it's as if it was crazy glued to the cpu - when you attempt to remove the heat sink, the heat sink may be stuck very strongly to the cpu, and even if you unclamp the heat sink, press straight down towards the cpu while you wiggle the heat sink back and forth, it may NOT come unstuck from the cpu !
I've encountered several heat sinks I could not remove from a cpu because thermal
compound (that has additives in it) had been used.
I had no choice except to pull straight up on the stuck together heat sink / CPU assembly. Thankfully no pins on the CPU were broken off, and the ZIF socket was not damaged.
"That caused the processor prongs to get bent so I spent over an hour realigning some of them with an ID card and tweezers. "
I know from those experiences that the pins DO NOT get bent unless you didn't pull straight up, or unless you hit something else while removing the heat sink / CPU stuck together assembly.
I could not get the cpu off the heat sink in those cases even after I removed the assembly, at least not without destroying it. I even tried (carefully) hammering several single edge razor blades between with one assembly - I broke the razor blades. The strength of the bond of the heat sink to the cpu was much stronger than the force required to pull the whole assembly straight up out of the locked zif cpu socket.
I've had no problem so far removing a heat sink when a thermal pad was used, or when thermal grease (that has no additives) was used, when I unclamped the heat sink, then pressed down towards the cpu while twisting the heat sink back and forth to break the bond to the cpu. Thermal grease is a lot easier to break the bond of.
Of the three ways, I recommend using thermal grease (pure silicon grease; no additives in it, translucent whitish, almost clear in a thin layer) - it never hardens, can always be re-used, at least, that of it that is not contaminated with dust or whatever.
In my cases of the thermal compound having hardened such that the CPU could NOT be removed from the heat sink, it still conducted / transferred heat well enough that the CPU was NOT overheating.
It sounds like either....
- similar thermal compound was used in your case but it was NOT conducting / transferring heat properly after it had hardened.
If so, I've never heard of that before - another reason to NOT use thermal compound !
- or - A LOT more liklely - the heat sink was NOT sitting flat on top of the CPU.
It's difficult or impossible to visually see whether it's sitting flat on the CPU when the mboard has been installed in the case. That's the reason you're always supposed to install the heat sink BEFORE you install the mboard in the case .
Applying too much thermal grease or thermal compound would NOT cause your severe CPU overheating problem !