CPU Upgrade And Thermal Paste
I'm interested in upgrading the CPU in one of my iMacs (27" Late 2012) from i5-3470S to i7-3770.
I'm getting the i7-3770 secondhand for $100 and will sell the current i5-3470S for about $50, so total upgrade cost is about $50 (well, $60 if you take the screen adhesive kit into consideration).
I've opened this iMac in the past for SSD upgrade (now it has 256GB SSD and 1TB HDD (not a Fusion Drive configuration). So I won't have any difficulties opening the machine, as I've done that in the past and have the appropriate tools.
I've watched some YouTube videos and read iFixit guides, and at some point I'll need to remove the heatsink in order to install the new CPU. Upon removing the heatsink the thermal paste will break and I'll need to re-apply it.
I've noticed that Apple uses regular grey thermal paste for CPU and GPU, but uses a white-ish paste on the GPU VRAMs which can be seen in iFixit guide (step 60): iMac Intel 27" EMC 2639 CPU Replacement
Does anyone know what thermal paste I should be using on the VRAMs? I have Arctic MX-4 and Noctua NT-H1 which are considered high-end pastes. Will they work well?
I appreciate any help/input.
Is this a good question?