Spending time optimizing Dark Souls: Prepare to Die Edition. The game runs fine, but momentarily (i.e. for 5 seconds every 30 seconds) the FPS, which is normally a stable 30 FPS, drops to 15 FPS. My PC specs are: Core i5 2500K OC'd ATI Radeon 6850 8 GB RAM Windows 7 I am using dsfix 2.0. Have tried fiddling around with all the setting (AA on/off), tried different combos, yet the FPS drop occurs frequently. Any help?