So I'm having sudden and dramatic frame rate loss at specific intervals. I'm reliably able to recreate it, but I can't do it in such a way to narrow down what's causing the problem. Basically what happens is I'll be running along, all settings max at 30-50FPS then suddenly for no particularly evident reason it drops to 1FPS or less. This happens almost all the time in Waterfront when I'm walking from the doorway in the wall to the light house. It happens in the housing area in waterfront as long as I look somewhat towards the harbor. Looking towards the surrounding lake I'm fine. If I look towards the river outlet going south and strafe sideways towards the lighthouse it's fine. If I look towards the lighthouse the frame rate drops around the time the arcane academy comes into view, though I can strafe all the way to the temple district just fine, even with the academy in center screen as I pass by. This also happens fairly frequently in cities. In Cheydenhall it happens around the church, in Bravil it happens on the citizen side of the river usually walking from the mage's guild to the warlock's luck. Also it happens pretty much anytime in looking toward the center of Leyawin. Here's a list of mods I'm currently running listed by load order, optimized with BOSS: Active Mod Files: • 00 Oblivion.esm • 01 CM Partners.esm **** • 02 Bab.esm [Version FINAL] • 03 TNR ALL RACES FINAL.esp • 04 TNR - ShiveringIsles.esp • 05 BlackScreenToggleFix.esp ### • 06 Unofficial Oblivion Patch.esp [Version 3.2.0] • 07 UOP Vampire Aging & Face Fix.esp [Version 1.0.0] • 08 Oblivion Citadel Door Fix.esp • 09 DLCShiveringIsles.esp • 0A Unofficial Shivering Isles Patch.esp [Version 1.4.0] • 0B _Real_Lights.esp ### • 0C Natural_Weather_HDR_with_darker_Nights_by_Max_Tael.esp **** • 0D Natural_Habitat_by_Max_Tael.esp **** • 0E Enhanced Water v2.0 HD.esp ### • ++ Enhanced Water v2.0 HD - SI Addon.esp [Version 0.1] ### • ++ ln.esp • ++ Symphony of Violence.esp • 0F LightsOut.esp • 10 Cities Alive At Night.esp • 11 AliveWaters.esp ### • 12 AliveWaters - Koi Addon.esp ### • 13 AliveWaters - Slaughterfish Addon.esp ### • 14 kuerteeAutoSaveAndTime.esp ### • 15 Book Jackets Oblivion.esp • 16 ClocksOfCyrodiil.esp • ++ CM_Better Wine.esp • ++ Cyrodilic Brandy.esp • 17 Days&Months.esp • 18 Inebriation.esp • 19 P1DseeYouSleep.esp • 1A Q - More and Moldy Ingredients v1.1.esp • 1B RAEVWD New Sheoth.esp [Version 1.5] ### • 1C SoT_Holiday.esp • ++ VA_BetterGold.esp • 1D Living Economy - SI.esp • 1E Living Economy - Items.esp • 1F Crowded Roads.esp [Version 2.0] • 20 DLCHorseArmor.esp • 21 DLCHorseArmor - Unofficial Patch.esp [Version 1.0.5] • 22 dlcorrery.esp • 23 DLCOrrery - Unofficial Patch.esp [Version 1.0.3] • ++ Bab.esp [Version RC1] • 24 Babarized BrashLeatherArmors.esp • 25 dlcthievesden.esp • 26 DLCThievesDen - Unofficial Patch.esp [Version 1.0.5] • 27 DLCThievesDen - Unofficial Patch - SSSB.esp [Version 1.0.4] • 28 BabShop.esp • 29 BABFinal_AdventuressWaresShop.esp • 2A BABFinal_AdventuressWaresShopPirate.esp • 2B dlcfrostcrag.esp • 2C DLCFrostcrag - Unofficial Patch.esp [Version 1.0.4] • 2D The Lost Spires.esp • 2E Natural_Vegetation_by_Max_Tael.esp **** • 2F Harvest [Flora].esp [Version 3.0.0] • ++ Harvest [Flora] - Shivering Isles.esp [Version 3.0.0] • 30 Harvest [Flora] - DLCFrostcrag.esp [Version 3.0.0] • 31 CT-YABM.esp • 32 CT-YABM - No Idle.esp • 33 DropLitTorchOBSE.esp [Version 2.4] • 34 DS Storage Sacks.esp [Version 1.21] • 35 Dungeon Actors Have Torches 1.6 CT.esp • 36 Dungeon Actors Have Torches 1.6 DT.esp • 37 Exterior Actors Have Torches 1.3 CT.esp ### • 38 Exterior Actors Have Torches 1.3 DT.esp ### • 39 2nd to 1st person.esp • 3A ImprovedSoulgems.esp [Version 1.11] • 3B P1DkeyChain.esp • 3C Toggleable Quantity Prompt.esp [Version 3.1.1] • 3D Quest Award Leveller.esp **** • 3E sr_retroactive_health.esp • 3F SM Ancestral Guardian.esp **** • 40 DD_ProximitySneakPenalty.esp • 41 RenGuardOverhaul.esp ### • 42 Enhanced Grabbing.esp [Version 0.5] • 43 Duke Patricks - Actors Can Miss Now.esp • 44 Duke Patricks - Fresh Kills Now Alert The NPCs.esp • 45 Dark Dungeons.esp ### • 46 Dark Dungeons - SI.esp ### • 47 Corean_hair_for_Original_race.esp • 48 Ethereal - Eyes.esp • 49 CuteElf11.esp [Version 1.3.5] **** • 4A _Ren_BeautyPack_full.esp **** • 4B CM Partners.esp **** • 4C CM Partners Special NPCs.esp **** • 4D CM Partners NPC.esp **** • 4E CM Partners More NPCs.esp **** • 4F CM Partners Marker NPCs.esp **** • 50 CM Partners Extra NPCs.esp **** • 51 cmAbbeyAeryn.esp **** • 52 cmSashaSonja.esp **** • 53 KT_CustomRaceFix.esp **** • 54 Get Wet.esp • 55 Visually Enchanted Drains 1.esp • ++ Visually Enchanted Fire 1.esp • ++ Visually Enchanted Frost 1.esp • ++ Visually Enchanted Shock 1.esp • 56 Visually Enchanted SoulTrap 1.esp • ++ Visually Realistic Deadly Lava.esp • ++ Visually Realistic Lava.esp • 57 Bashed Patch, 0.esp • ++ Duke Patricks - BASIC Script Effect Silencer.esp • ++ Duke Patricks - BASIC Script Effect Silencer BETA.esp • 58 ALE_cenoglass.esp • 59 Enchanting_and_Spellmaking-6322.esp **** • 5A SM Racial Spell Leveling.esp **** • 5B DEJ Harvest - Containers [Combo].esp • 5C SM Start Spell Levelling.esp **** • 5D SM Spell Quest Levelling.esp **** • 5E cmKittyCole.esp **** **** = Mods I've installed after noticing this problem so figuring they're not the cause. ### = Mods I've deactivated and cleaned with OBMM resulting in the problem lingering. No .esp mods I'm using... Ayelid Ruins Parallax Better Rings and Amulets Dark Darn UI Diverse Grasses ### Elven Map Redux **** Facial Textures by Enayla Fast Exit Landscape LOD replacement (Blade9722 & Qarl) ### More Gory Blood Natural Faces Parallax Cities Parallax Qarl's Textures Pluggy Qarl TP3 v1.3 Skingrad Roof Textures Weathered Direction Signs OBSE v 18 I also switched over to Natural Environments from Enhanced Weather, stopped using Animated Window Lighting System w/ Chimneys, Better Cities, Duke Patrick's Magic You Can Believe, Hotkey Casting, Let the People Drink, NPCs Yield LoD Noise Replacer, More Immersive Sound, Musical Immersion, OBGE, Persuasion Overhaul, Storms and Sound, and Streamline. My first guess was LoD textures or water mods so disabled those first to no avail. I've adjusted video settings with no effect, which is actually why I disabled Streamline. I thought that maybe it was changing the settings a million times per second and that was causing it. I know it can't really be my hardware due to texture packs because I've run these same textures on this computer using a 8800GTX as well as a 7800GTX and have since upgraded to a GTX275. It seems to be something to do with CPU bottlenecking. Perhaps a script that's looping over and over. The hard drive access light doesn't light up anymore than normal during these times. My game runs very stable. I play for almost all of my free time and it may CTD once every other day or so. This problem never happens indoors. Frequently when this happens I notice a random texture goes completely black. This sometimes fixes during load screens, always fixes with an exit and restart. Attaching my dxdiag.txt incase it's of any use. Any help troubleshooting this would be greatly appreciated.