That would speed up things....what you are atempting is a bit on the megalomanic side of seriuously megalomaniac. A 980TI is not a wonder weapon, for doing a job like that you need a Tardis to send you computer back to the 70th :-). 500 12 Mpixel images and a high point cloud took 24 hours on my 32 GByte 6 core 980TI machine. More memory would also be nice. And 2000 million points by 4 is about 8000 million points....every step amplifies the stakes by 4, so a 16 Mpixel photo on ulta-high uses every pixel, on high every 4th pixel (4 million x 11.000 x 3 or 4 bytes = a ^%$load of RAM) and time taken is always a bit (a verry big bit) of a guess. I've seen Agisoft construct a 200 million point cloud from 89 pictures in about 5 hours calculating time (both on GPU and CPU simultaniously) and I have waited overnight on a 4 million pointcloud from setting high using 227 frames from the same camera. Beats me....
But 11.000 pictures is a cardload.....djees!
Greats, Ed.