I'm now playing Nehrim, sometimes I notice unpleasant lags, I don't know why. In Erothin city FPS drops baddly, outside of it it's ok. There's also FPS drop in dark forest, when game uses... dynamic light. Casting spells is a horror, lags are very big. Weird, game doesn't have problem with ENB and its SSAO. Lags happens with ENB and without.

Also in Oblivion, after generating distand land performance dropped. In Imperial City same situation as in Erothin.

I patched game with 4gb patch, but it doesn't work. I had 4 gb ram, now I have 8, same performance. What have I to do?

My computer: Intel® Core™ i5-2300 CPU @ 2.80GHz (4 CPUs), ~2.8GHz, 8 GB RAM, AMD Radeon HD 6700 Series