Amnesia runs slow even with great PC spec's

[Knightmare110]

Hi, I am having trouble running Amnesia without serious FPS issues. I have a desktop. My NVIDIA graphics cards are up to date, and I also do not have an integrated graphics card. I have turned off SSAO, but still it lags badly. I have even tried running it on only 2 cores, but it does not help. My OpenGL version is 4.3.0. Does anyone have any other suggestions?
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Specs:

Operating System - Windows 7 Home Premium 64-bit

System Manufacturer - Dell

System Model - XPS 8500

Processor (CPU) - Intel Core i7-3770 @ 3.40GHz (Quad-core)

Memory - 12.0 GB

Video Card - NVIDIA GTX 760

Power Supply - 760 watts
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As requested, I have attached my hpl file.