Processor :- Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz, 1701 Mhz, 2 Core(s), 4 Logical Processor(s)
Graphic Driver Version is 10.18.10.3277
One more thing i would to mention that this issue arises only when i either plug or unplug the charger.
i.e if i boot system on battery it will run fine gpu core frequency will reach 1050 mhz but as soon i plug the charger it gets locked at 350 mhz.
only option i find for this is to shutdown and then start or sleep and then resume.as restart doesnt seems to fix the issue.