Inspiron 3650, why is my AMD R9 360 video card stuttering? Can it be failing?

My computer is an Inspiron 3650.  The components are:

6th Generation Intel(R) Core(TM) i7-6700 Processor (8M Cache, up to 4.00 GHz)

16GB Dual Channel DDR3L 1600MHz (8GBX2)

AMD Radeon(TM) HD R9 360 2GB GDDR5

And it was new as of July of this year.

1st problem:  While playing Skyrim it went to a blue screen of death and was so locked up that I had to use the Windows OS cd to run an OS repair to get my computer to boot again.

2nd problem:  After that OS repair I used an app to completely remove my AMD drivers, reboot the computer in safe mode, and then I installed the latest drivers from AMD (not the Windows update).  At this point Skyrim, which use to run, stutters and crashes every 30 to 60 seconds.  When it crashes one of two events are logged to the Windows event viewer.  It's either "Display driver stopped responding and has recovered" or "Application Tesv.exe has been blocked from accessing graphics hardware"

I ran the Dell diagnostics program and while it says all the test passed the video stress test was showing an FPS of only 2 to 5 frames per second.

BTW, I'm running in 1920x1080

I tried going into the AMD config app and set some special settings just for Skyrim.  I boosted the voltage slightly (up 5%) and dropped the GPU clocking slightly (down 3%) and set the fan to 100% always on.   That worked for about 4 hours.  Every time the GPU temperature got to 70c it would immediately crash.  If I let the fan run on auto then the fan speed is not keeping up with the temperature.  If I set it to 100% manual (always on) it seems to keep the temperature down below 70c.

That was Saturday.  With the exact same settings on Sunday it crashes every 30 to 60 seconds again.  I tried other games and now even Minecraft is stuttering and crashing and that doesn't stress the graphics card anywhere near what Skyrim does.  It seems to be getting worse and worse.

Any advice or insight would be very welcome.  The computer is beyond the 30 day return limit but still within the 1 year warranty.  Is there anything that I should try before working with the Dell warranty department or should I be trying to get a new video card under warranty?

Thank you