Green pixels when it get hot, help!

Maybe somebody here can help me with this problem. I have a MSI barebones 17” with a 680m. Whenever I play a graphic demanding game I eventually get lots of green pixels that take over screen. If I turn the fan on high they usually go away after a minute or two.

I never re-pasted the GPU and I am thinking this will fix the problem, does it just have one spot where I would add paste if I took the heat sink off, do I need heat sink pads or anything?

 

Bump.

Nobody has had this problem?

 

My temps on CPUID HDMonitor don't seem to high for when it all starts to turn green. Green pixels seem to start and mostly take over anything on the screen that should be black.

Temps when gaming:
Tz200 28c
Tz201 30c
THRM 81c

TMPIN0 83c

CPU cores 1-4 79-81c
GPU 81c

 

Have you tried lowering your core or memory clocks to see if the issue goes away? It may hint to the source of the issue.

 

Should I use msi afterburner to do this? Haven't really had to mess with anything since I put it together a few years ago.

Edit

I used msi afterburner and lowered memory, it had no effect on the green pixels once they started to pop up. Only thing that gets rid of them to turn the fan on to full blast which doesn't always help with some games, or just quit game and wait a bit.

 

Is the exhaust port blocked? Make sure the system has enough airflow while it's on the desk.

 

Try lower the core freq, it's more probable.

 

While your temps do look normal it does sound like a heat issue. It happens when you game and the temps go up, then when you turn on max fans which in turn the temps go down the green dots go away. Before you do a repaste you can open up the bottom of the computer and clean out any dust that has built up in the fans and vents. Be sure to prevent the fans from spinning freely while cleaning them.

 

I blew out the vents and everything a couple of months ago when I first encountered this problem. I can feel a good hot breeze coming from the vents.
Seems like it starts right around 80c. I’m thinking maybe one of the memory modules doesn’t have thermal pad or something on the gpu. I have a fluke temp gun maybe that can help figure it out. I hope that it’s not a gpu going bad.

 

It could be the vrms getting unstable as they heat up. Try a repaste/repad.

 

Eureka!
I plugged hdmi into my TV let it run for a long time no problem on either screen. When I unplugged hdmi screen blinked boom green pixels. I plugged hdmi cable back green pixels still on laptop screen but not on the TV.

Ok so what would that be cause, loose monitor cable that heat is affecting?

Edit: both the laptop monitor and TV are running at same resolution. Also I noticed on the laptop is set to 59 hertz I changed it to 60 not sure if it will effect anything just trying to figure out if this is a software or hardware issue.

 

Possibly, both are under optimus in your machine so the scene is rendered by the dgpu bit outputted by the igp.

 

I reinstalled Intel and Nvidia drivers that did nothing. I reseated monitor cable on board and that also did nothing.

What are the key differences between the HDMI out and the cable going to the monitor why does one not have issues and the other does not?

Going to try repaste/pad Friday.

 

I repasted and replaced thermal pads and now its running about 5-10c higher but that might be because I just did it 30m ago and it needs to set. It had no effect on when the green pixels pop up, I thought with higher temps they might pop up faster but they didn’t so I’m starting to think this issue has nothing to do with Nvidia GPU. Since the output to HDMI works I’m thinking it has to be something with motherboard but I don’t know what or if it can be fixed .

 

Still have this problem driving me crazy, anybody around LA area that I could drop it off at to have a look at? Or anyone came across this same issue? Don't know if its worth fixing.

 

Have you completely removed the fan, cleaned it of dust, and done the same thing with the grilles of the heatsink?

Had the same issue with my old GT70, and that solved it. The heatsink grilles were utterly clogged with dust.

 

I even took off the heat sink, and reseated the screen cable. Just did a fresh install of windows 10 hoping that might do it, no change.

Checked it again when I use HDMI out to a monitor no issue, unplug it and the laptops screen black pixels are all green. Close what ever game I'm playing to test and after a few minutes the green pixels go away.

 

Can you record a video of the issue happening? The way you describe it makes it seem as if the screen itself is going bad or something.

 

Il try never posted video before. I found this example on youtube of an ipad that looks exactly like my problem.

 

Does anyone know the thickness that the thermal pads around the GPU? Any product that anyone could advice, should I use copper shims instead with thermal paste or just thermal paste instead of the pads?

 

BUY A NEW GPU!

 

Success

I replaced the thermal pads that I put on last time that were 1mm with .5mm that I read around here somewhere was the right size. Repasted gpu with Gelid instead of AS5. My temps now max at 76c. It takes a long time for the green to pop up now and goes away fast if I turn the fan speed up.

I don’t like how loud the fan sounds on high is so I bought Opolar LC05 vacuum cooler and attached it to the back vent at low speed and my screen never turns green now.

Not perfect but I'm happy again

 

The GPU is defective, what you did is not a total fix and the issue can worsen down the road.

 

That's also what I think. I'll be happy if I can at least get another year or so out of it.

 

Good luck man, after issues like that presents themselves, it is a ticking bomb. I have had several GPUs die on me before

 

If and when it does poops out on me, whats the best/easiest card to upgrade to?