What's the size of this cpu and gpu

Hello, im gonna buy some fujipoly thermal pads and I want to know if two 15x15mm pads are enough for a i5-4200m and a gt 745m, or should I buy 50x50mm?. I can't open it and check for myself because I have no replacements here, so I'm asking if someone knows what's the size of both the cpu and the gpu, not the whole package size, but the part that makes contact with the heatsink.
Also, what is the "usual" gap between the cpu/gpu and the heatsink? the pads come in 1.0mm, 1.5m and 2.0mm, I think im just gonna blindly buy the 1.5mm one and hope it works fine.

 

you have to cut them up a bit anyway. But the intel chips tend to be something like... 15x35mm + a 15x20mm on the gpu..or southbridge, or whatever it is now. Nvidia gpu tops are a bit larger, a 20x20mm square or so. You would.. well.. likely not see much difference between the different sizes, but as thin as possible used to be a good idea. But.. looking up the fujipoly pads.. 11 w/mK.. that's higher than the thermal paste I'm using >_< Think the pads I had was something like 2 w/mK. So since it's so high, that would probably make the thickness completely irrelevant on laptop temps (they'd affect how fast the heat will start to transfer, utterly immaterial until you get to older desktop cpu temps now). So major concern would be whether or not the cooling array will fit on top.. which it will in any case.

..also really don't know if for example a thinner pad might last for shorter or longer before it hardens - there will be contact with air on the side of the pad anyway. So parts of it will harden before the rest (year or two usually). Perhaps a thinner pad would minimize the deterioration because it will be shielded somewhat better by the heat-sink. Or a thicker pad might be more resilient to the effect since it has bigger mass. So that could possibly go either way. But I would take the thinnest one, at least. Is a thought as well that a thinner pad would be more stable and squish less on the smaller die-sizes on laptops.

 

Thank you for the input.
I bough two 15x15x1.5 14w pads and a 50x50x1.0 11w pad, plus a 3.5gr gelid solutions gc-3 extreme thermal paste just in case. They'll arrive in a week or so and hopefully I'll see those temps go down. The main problem was not the cpu itself, but the gpu that was causing the cpu to overheat, it is a cheap no-brand laptop after all, so it was expected to have bad cooling.

 

i believe the actual thermal paste u were looking for would be gelid gc extreme, NOT gc-3! unfortunately, gelid has several pastes with similar sounding names but vastly different thermal performance. king of the hill of non-metal based pastes is thermogrizzly kryonaut btw
as for the pads, fujipoly also has several types, the 17W/mK ones are the higher performing ones. also, i wouldnt use the pads on the cpu/gpu chips themselves, but rather on their surrounding components, such as power phases, vRAM chips, etc...

Sent from my Nexus 5 using Tapatalk

 

It was labeled as gc-3 extreme by the seller, but yes it is gc extreme. I was between gc extreme, thermogrizzly kryonaut, and mx-4. I ended up ordering gc extreme because it's impossible to find kryonaut here, mx-4 was tempting because of the price, but gc extreme is just better.
My idea was to use the pads only if the gap is too big, I know I can use copper shims or coins to fill the gap and use paste on both sides, but it's the first time im changing a laptop paste/pad so I don't wanna try fancy stuff yet.