CPU cooler isn't fixed on motherboard

[Dalli]

hi there,

yesterday I cleaned my gpu/cpu fans and replaced the thermal paste, but when I screwed back the CPU heatsink/fan I only found one hole to screw in, the other 3 are non existent, so its like the cpu and the heat sink contact is only forced by one screw and the sticky substance of the thermal paste.

Today I ve had some weird lags (no sound through one specific headsets, videos are laggy by games are not, some windows wont open) I noticed that the CPU temp reaches 90c and 100c easily. restarting the pc a couple of times fixed those lags, but the temp is the same.

Pretty sure that the heat isn't getting transferred from the cpu to the heatsink due to the low pressure from one screw. This video show exactly what I have (Ryzen 5 3600 and gigabyte B450 ds3h ) but he somehow ends up with 4 hole to screw in https://youtu.be/FGHvckrhjzI https://i.imgur.com/AytPJKd.png

there is for sure something mentioned in the video which I am missing (1:41 "retain the backplate" ???)

Appreciate your help!

[Needfuldoer]

 

There's a solid metal backplate that's supposed to sit flat against the bottom of the motherboard. It has all four standoffs attached. You have to hold it so all four standoffs protrude through their holes (like the one circled in green), then you can screw the heatsink in.

 

If your case doesn't have a hole through the motherboard tray to access this backplate, you'll have to take the motherboard out.

[PDifolco]

9 minutes ago, Dalli said:

hi there,

yesterday I cleaned my gpu/cpu fans and replaced the thermal paste, but when I screwed back the CPU heatsink/fan I only found one hole to screw in, the other 3 are non existent, so its like the cpu and the heat sink contact is only forced by one screw and the sticky substance of the thermal paste.

Today I ve had some weird lags (no sound through one specific headsets, videos are laggy by games are not, some windows wont open) I noticed that the CPU temp reaches 90c and 100c easily. restarting the pc a couple of times fixed those lags, but the temp is the same.

Pretty sure that the heat isn't getting transferred from the cpu to the heatsink due to the low pressure from one screw. This video show exactly what I have (Ryzen 5 3600 and gigabyte B450 ds3h ) but he somehow ends up with 4 hole to screw in https://youtu.be/FGHvckrhjzI https://i.imgur.com/AytPJKd.png

there is for sure something mentioned in the video which I am missing (1:41 "retain the backplate" ???)

Appreciate your help!

Hrmmm how many screws did you unscrew when removing the cooler ?

I'm pretty sure there wasn't only 1, and all mobos have holes for attaching a cooler, look again  

[Dalli]

25 minutes ago, Needfuldoer said:

 

There's a solid metal backplate that's supposed to sit flat against the bottom of the motherboard. It has all four standoffs attached. You have to hold it so all four standoffs protrude through their holes (like the one circled in green), then you can screw the heatsink in.

 

If your case doesn't have a hole through the motherboard tray to access this backplate, you'll have to take the motherboard out.

so the video happens to have the same hole as me just by pure coincidence? wow!! I think I can't access it from from my case so I would need to remove the mobo as you said, but one more thing please, should I apply the thermal paste again or what I already applied yesterday should be fine? thanks

[Needfuldoer]

1 minute ago, Dalli said:

so the video happens to have the same hole as me just by pure coincidence? wow!! I think I can't access it from from my case so I would need to remove the mobo as you said, but one more thing please, should I apply the thermal paste again or what I already applied yesterday should be fine? thanks

Clean all the thermal paste off both the CPU and heatsink, then apply new paste again. That way you know it got applied properly.