Chosen Solution
Lenovo Ideapad 110 171IKB 80VK -Intel core i5 7200U - HD 620 Graphics [ 2017 ] MB: Nano 7C1 [ IMAGE ATTACHED ] Hey guys, SO i’ve been snooping around in this pair of laptops i received and i noticed something a little strange - well allot strange. The CPU heat spreader/sink appears to have a cut-out for what i believe is the Intel graphics die / chip. It is not making contact with the heat pipe and as in the picture - it’s completely sectioned out purposely. Ive seen my share of processors and myriad heat spreaders, and i’ve never seen an exposed part like this, further compounded are my concerns because with some digging, i found a Dell machine using the exact same chip, and their cooling solution has a full coverage heat plate! - (also in the image.) I honestly cant think of a viable reason/excuse for this, all i can imagine is that with some even-slightly-er heavy work load on the chip, it will hit a thermal throttling Brick Wall almost instantly. Has anyone ever seen this before? Is there a reason for this? What can i do to cover it properly? Blob of thermal paste?
@maegan_mouse this is done by design. If you have any concerns about this, run a temp control software (not sure what OS you are using) see what your temps are. Dell does things different than Lenovo and neither one has to be right or wrong. There is no reason to change or modify anything unless the computer shows evidence of overheating.
It could be an aftermarket heat sink/pipe. Some thermal paste should do the trick, but if you’re experiencing issues, try and find a better aftermarket part.
Yes, Intel onchip GPU is cooler than CPU. That is true. The reason maybe this: GPU part is about 0.3mm lower than CPU part. If you cover both parts by thermal paste, you will make much worst GPU ventialtion, than in cease, when it is not covered. But I can not believe, that the air ventialtion is sufficient. I saw many such laptop models with fried CPU/GPU. So my lognterm working solution is this: I filled that hole with exact silicone thermal pad 1.5mm thick. It alowes good connection between the copper part of hetasink and CPU and also its deformation makes good connection between heatpipe and GPU. In the beginnig I stressed up CPU/GPU by some benchmarks simaltaneously for many hours and I reched maximum temp about 72 deg Celsius. So I think, tehre is no risk this way and better solution then empty hole.
Morning, i have the same hole in the heatsink of my lenovo flex 2-15 and was also wondering why a part is not cooled. I think this is the answer:
Its an audio decoder and thats it. :)
Old post, but just some extra info for anyone interested. I have a lenovo c740 (single board i7, no gpu) with a similar design. The main cpu die has a matching pad on the heatsink, but the smaller die has no matching pad. You can’t see this because there is no hole in the sink, but it definitely does not touch. This machine has cpu overheat+throttling issues with a standard setup, so I’m redoing thermal paste and was pretty surprised to see this. Probably the main die needs all the help it can get.
