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I've had a V3-772G for 2 years now and it came with Nvidia 760M card. Was all fine and dandy until last weekend when it blinked off whilst I was cruising around in a Tiger 1 on Warthunder. The machine had got a bit hot and I let it cool down for 10mins before restarting, then everytime i attempted to run anything graphically intensive it would blink off.
So i then dismantled it to have a go at cleaning the heatsinks and replace the thermal paste. Removed some dust that had built up and replaced the thermal paste with CoolMaster E1.
The laptop now runs games at 60fps again, but this drops to 30fps after about 1 minute, then floats around 20-40fps. I downloaded a few programs like speedfan and GPU-Z, these are showing the gpu hitting 95-99 degrees whilst under load, but when i then exit the games it drops down to 0 degrees.
Used a program called DDU to completely removed my Nvidia drivers and then carried out a clean install. So I'm fairly sure that it's not a software issue.
The fan seems a lot louder, and/or running at full whack more constantly. So I'm guessing maybe that's damaged or the heatpipes/sink, anyone know if this is a thing that can happen?
Usual culprit is dust in the airpath. Give it a damn good clean.
Is it an option to stick a bigger heatsink in there?
Took it down to component parts, found some big dust bunnies and removed them. Bloody thing doesnt have an easily serviceable fan/heatsink.
Also there's cool air coming from the exhaust vent, rather than the hot/warm air that used to come out... Heat sink kit is only £24, so i might just risk it.
Two things,
1) Dust bunnies in the airpath as you say. I mention this again because they're easy to overlook; I had my laptop in bits several times before finally finding the cause of its overheating, a clod of grot deeply buried in the assembly and hard to see.
2) Do you know what you're doing with the thermal paste? You need to remove the old stuff completely ("TIM clean" is good) and reapply the thinnest of slivers. If you plaster it on like it's a peanut butter sandwich it won't work effectively. (Apologies if I'm preaching to the converted, just checking.)
First time I took it to bits I didn't take the fan/heatsink assembly to bits so missed the wad of dust sitting on the radiator fins. Second time I did and also gave it some good blasts with a can of air.
The paste I bought came with some alcohol wipes, which i used clean it off and a spatula which I used to spread the new stuff on with. I might have used too much so I'll take it to bits again and have a look. I didn't have any new thermal pads so reused the old stuff. I'll try replacing these, looking around (online) there are different thicknesses and all sorts so I'm a bit lost tbh.