For what its worth, I also use Safety Load & a modified skse loader dll (mem blocks 768/256) as well as a.245 binary enb preset (enboost) and I do not suffer CTD or ILS. This is run on an i7 4770 (3.5GHz) with 16 GB Ram & GTX 670 (2GB Vram). I have ugrids set to 7 with ewi65's v31 ini files (available on Nexus) and Cell Stabilizer. I am running a grotesque (by STEP standards) collection of 414 mod packages/235 esp files. I have played for as long as 7 hours straight without a CTD or ILS occurring, averaging 32 fps (give or take 2 fps according to Skyrim Performance Monitor), I shut down because I needed sleep. So as far as my non scientific testing goes, seems stable.Does your FPS tank around the forest surrounding Riften? I have an R9 290 (4gb VRAM) and I get the same fps as you with fps dipping down to 18 around the area I just mentioned. I can't for the life of me figure out why I'm getting such low fps. I think AMD just runs horribly with Bethesda games regardless of how much power/vram it has.My apologies, I did not mean to post and run. I have not noticed gameplay tanking in Riften (I do have performance textures for that area), and I was about to launch Skyrim with Performance Monitor to get some empirical data on that, but I have a mod conflict (I believe). I just installed Realistic Weapon Position and I think I 've created a conflict, give me a few minutes to track it down and fix it. I'm using BAIN to anneal, if I still have an issue launching I'll uninstall RWP until after a tour of Riften with SPM.