2 Questions before delidding CPU

[Gabe666]

Hello everyone,
I will be delliding my i7 Cpu and have two questions:

First:
if in theory I would touch the Cpu DIE while running would i get electrocuted (nevermind burned etc) ? I am asking so that I understand if putting Liquid Metal paste between die and ihs will electrify the ihs or not? Because then only my arctic mx4(which i should apply\spread perfectly) between ihs and cpu coller would prevent the cpu cooler to get electrically charged .. (????!!) The stock TIM on the die is certainly not electrically conductive..But on the other hand thinking about all the soldered AMD cpus.. do those cpus electrify your cooler if you forget to use thermal paste?

Secondly:
is normal silicone (for use in construction\bathroom sealant etc) electrically insulating ? I want to make sure that the liquid metal won't drip on the contacts after I put back the ihs ( http://1.bp.blogspot.com/--7Cr_0OwW8U/UcveTTQGoII/AAAAAAAAIh8/RcXklVR-Bu4/s1600/haswell+delid4.jpg ).If possible I would like to not buy a liquid electrical tape because where I live it costs upwards of 25$.. (has to be imported).

I just found on some forums:
is it safe to use normal Arctic Mx4 on those contacts next to the die ? Is the arctic electrically insulating?

Thanks all in advance!

 

[caqde]

1. No the electrical signal is sent through the tiny wires created during the creation of the die. The actual die material does not conduct electricity otherwise using liquid metal would be bad and power would leak all over the chip and the chip wouldn't work.

2. The recommendation is to use certain types of nail polish. Gamers Nexus has a video on delidding and applying liquid metal to the chip and also mentions what to look for in the nail polish. I wouldn't think silicone would be a good thing to use unless it is being used along the outer edge of the IHS as it would also be a heat insulator increasing temps of the chips surrounding the cpu die..

Mentioned source link ->
https://www.gamersnexus.net/guides/3060-7900x-delidding-and-liquid-metal

 

[mdd1963]

(I'd be rather surprised if the metal heat spreader were not electrically conductive, unless you've tested it with an ohmmeter, etc....)

Do NOT power up the CPU with no heat spreader or cooler on a heat spreader.

 

[Gabe666]

1. No the electrical signal is sent through the tiny wires created during the creation of the die. The actual die material does not conduct electricity otherwise using liquid metal would be bad and power would leak all over the chip and the chip wouldn't work.

2. The recommendation is to use certain types of nail polish. Gamers Nexus has a video on delidding and applying liquid metal to the chip and also mentions what to look for in the nail polish. I wouldn't think silicone would be a good thing to use unless it is being used along the outer edge of the IHS as it would also be a heat insulator increasing temps of the chips surrounding the cpu die..

Mentioned source link ->
https://www.gamersnexus.net/guides/3060-7900x-delidding-and-liquid-metal

ok thanks. I am just afraid to use nail polish, because they almost never say whats inside, I mean even a clear nail polish may conduct electricity.. I am now also considering either epoxy or my normal arctic mx4 to insulate those contacts.. Until now it seems really impossible to find something that insulates(specifically says so on the packaging) under 20€ (25$).. ;-(

 

[racksmith101]

Use an Acrylic or Polyurethane conformal coating to insulate the contacts, don't use silicone based sealant unless it's designed for use on electronics (ie MIL specified) as there are all sorts of other chemicals mixed in with them that may react with the thermal compound (had it happen a few times over the years with customer PCBs).

 

[Gabe666]

Use an Acrylic or Polyurethane conformal coating to insulate the contacts, don't use silicone based sealant unless it's designed for use on electronics (ie MIL specified) as there are all sorts of other chemicals mixed in with them that may react with the thermal compound (had it happen a few times over the years with customer PCBs).

thanks, you may be right, also i have read somewhere that the normal silicone can give off (bad) fumes when exposed to high temperatures. I ended up buying none of the above but Kapton Tape.. its electrically insulating, and resists up to 280 degrees C.