FPS drops after cleaning PC. Plz Help!

[Hsuyaa]

Thanks to everyone who help me. A few days back i decided to give my pc a clean up because i had not done it for a while. I reapplied thermal paste on cpu and on the gpu. I cleaned the fans n all. When i opened up the gpu i saw alot of the thermal paste was collected around the die and was in a hardened state. I decided to remove it with a soft plastic knife. I scraped with minimum force removing the hardened paste. Then cleaned the dye with a microfibre cloth,reapplied paste and that was it.

        To my dismay, once i fired up some games they had massive fps drops which wasnt the issue before cleaning. But this is the weird part. Whenever i alt tabbed out of the game or opened my task manager and back, the fps drop was gone and everything went back to normal. I thought this issue might go away but it has been a few days since its doing this. Thing that i have noticed in the task manager is the gpu usage randomly jumps to around 40-50% whenever the lag comes in. Its not just that the games lose fps but even normal tasks such as typing in ms word or watching a video. 

        The issue is really annoying and i'm not sure what to do to fix it. Pls guys any input is valuable. Thanks

[Shimejii]

Should say what game and such. Sounds like Windows is the issue not the GPU.

[GDRRiley]

DDU drives and clean install them

[Hsuyaa]

1 minute ago, Shimejii said:

Should say what game and such. Sounds like Windows is the issue not the GPU.

  I mostly play games like Doom/GTA 5/Minecraft . Some old MMOs. I use two screens,one for playing the game and other for surfing youtube. Before the cleaning everything worked fine. But not now. 

 

[Shimejii]

I would do a quick reseating of the GPU just to make sure its in right. Check all your cables and such.

[Hsuyaa]

4 minutes ago, GDRRiley said:

DDU drives and clean install them

Alright i'll try that. However it was working all fine before the clean. I had not updated the drivers or anything when the issue came up. I'll still give it a try. Hopefully its a driver issue 

[GDRRiley]

Just now, Hsuyaa said:

Alright i'll try that. However it was working all fine before the clean. I had not updated the drivers or anything when the issue came up. I'll still give it a try. Hopefully its a driver issue 

windows will auto mess with drivers

[Hsuyaa]

So i DDUd the drivers and also reseated everything. Sadly the lag still didnt get fixed. I realized it wasnt my gpu but my cpu that was the problem. it seemed that the cpu clock dropped from 4.4 ghz to merely 10 Mhz or something at times. I tested cpu stability using Intel Extreme Tuning Utility and found that memory test made the huge lags happen. Then i realized i had swapped the 2 ram sticks i have around in the ram slots. I use one of those sodimm to dimm converter to use a 8 gb laptop ram on my desktop. I swapped them back to how they originally were and the lag is gone! So i guess that was the cause. Thank you guys for ur input!