Lag/Low FPS Help

[AlabamaRebel]

If I launch the game, walk away for about 20 minutes, then come back and load a saved game I have pretty good FPS for a while but then my FPS will start to drop off.

It seems worse while at the Red Rocket where it drops below 20 FPS.

At the Red Rocket I have 7 settlers and 12 companions hanging out with being only about 60% built up.

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System Information

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Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_rtm.101119-1850)

Language: English (Regional Setting: English)

System Manufacturer: ECS

System Model: IC780M-A2

BIOS: Default System BIOS

Processor: AMD Athlon II X2 250 Processor (2 CPUs), ~3.0GHz

Memory: 8192MB RAM

Available OS Memory: 8192MB RAM

Page File: 3831MB used, 12548MB available

Windows Dir: C:\Windows

DirectX Version: DirectX 11

DX Setup Parameters: Not found

User DPI Setting: Using System DPI

System DPI Setting: 96 DPI (100 percent)

DWM DPI Scaling: Disabled

DxDiag Version: 6.01.7601.17514 32bit Unicode

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Display Devices

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Card name: NVIDIA GeForce GTX 550 Ti

Manufacturer: NVIDIA

Chip type: GeForce GTX 550 Ti

DAC type: Integrated RAMDAC

Device Key: Enum\PCI\VEN_10DE&DEV_1244&SUBSYS_15563842&REV_A1

Display Memory: 4049 MB

Dedicated Memory: 977 MB

Shared Memory: 3071 MB

Current Mode: 1600 x 900 (32 bit) (60Hz)

Monitor Name: Generic PnP Monitor

Monitor Model: HP S2031

Monitor Id: HWP2903

Native Mode: 1600 x 900(p) (60.000Hz)

Output Type: DVI

Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um

Driver File Version: 10.18.0013.6143 (English)

Mod load order:

Fallout4

Spring Cleaning

Snap'n Build

SettlerRenaming-Indicators

SC_ExpandedScrapList

ExpandedCroupManor

Snap and Build

Companion Infinate Ammo and Unbreakable Power Armor

DD_CBBE_SLooty_Castle_Innie_Vajayjay_4k_Fix (Hell of a name for the castle wall fix)