Should I see improvement upgrading from MSI TwinFrozr 770 2G to a 980 Ti?

Hi all,

Here's my current spec:

i7-4770k @ 4.3

MSI Gaming GTX 770 2G factory OCed

8G G.Skill Ripjaws Z @ 1200Mhz (That's what CPU-Z showing under DRAM Freq. I forgot what I set in BIOS)

I recently got the P3D v3.2 and PMDG 777, had ORBX OpenLC for NA and Vector, ActiveSky in the background. I was going into Vancouver, BC (default scenery) and I was getting spikes and texture was flickering pretty badly. Weather was pretty clear that day, very little cloud and no precip. FPS was low teens to single digits. My settings in p3d was medium at best (I forgot the exact settings).

I'm wondering if I upgrade to a 980 Ti, will I see some improvement over my current spec?