This issue has occurred since a month ago. When i begin to play any game like Assassin's creed 4, BattleField3, Total War: Shogun 2,... it runs smoothly (50-60fps) in just 5-10 minutes and high setting... Then randomly, the FPS drops like hell (10-20 fps, lower in AC4)... Sometime, when i restart the game or change resolution, it will get back to normal but sometime it will need to restart the laptop... So i used GPUZ and test with Saints Row 4 to see if my GPU still working or not, and this is the result.
+Normal: http
/s11.postimg.org/43sho1uzn/image.gif
+Issue Occurred: http
/s11.postimg.org/l9f56efc3/image.gif
This is my Specs:
+Asus P550L series
+CPU: Intel Core I7-4510U 2.00GHz (4Cpus)
+Intel GPU: Intel Hd 4000
+Nvidia GPU: Nvidia Geforce GT840M
+4Gb Ram
+Windows 8 Pro 64-bit
And As you can see in 2 gifs above, Temperature (50-60C) is not high enough to think about Overheating so dust can't be my problem here. And my default GPU set as Nvidia one... Hope someone have the answer soon and help me to solve this problem... And sorry for my bad english too... ^^
+Normal: http

+Issue Occurred: http

This is my Specs:
+Asus P550L series
+CPU: Intel Core I7-4510U 2.00GHz (4Cpus)
+Intel GPU: Intel Hd 4000
+Nvidia GPU: Nvidia Geforce GT840M
+4Gb Ram
+Windows 8 Pro 64-bit
And As you can see in 2 gifs above, Temperature (50-60C) is not high enough to think about Overheating so dust can't be my problem here. And my default GPU set as Nvidia one... Hope someone have the answer soon and help me to solve this problem... And sorry for my bad english too... ^^