Afterburner OSD shows decreased GPU core clock, Lim1 No Load appears and fps decreases for half to 10 seconds

[sanyika66666]

MSI Afterburner's OSD shows that the GPU core clock drops to lower values, even to low-power 135Mhz, when this happens it also shows a LIM1 NO LOAD line too. This causes extreme fps drops(currently only in gtav, ive never tried with other aaa games, but i didnt experience this in any other game) which is unplayable even by me(i can quickscope anybody at 7 or more fps*). I tried this with oc and without, doesnt matter, tried underclocking, setting Windows to put more power to pcie, but no hope.
ASUS X751NV
N3450, 4Gb DDR3-1600, 920MX, 1600x900, 1Tb HGST 7.2
i know this thing cant run anything but hey: i s*ck!
still has warranty, hdd has a trillion of bads, file Manager takes a hell of a lot of time to load if one instance is not open already, only these symptoms occur on this bad boy
i read lots of things from voltage problems, cpu throttling, etc etc but i just dont know what to do. first 2-3 months of use was without this issue.
thank you for replies!

 

[popatim]

If the HDD has bad sectors, then please replace/warranty it.