Up till today AHIII has run fine on my system, which I updated this summer.
Even though I haven't changed anything I log in today and even though the framerate says 59 or 60fps (when I hit cntrl-I) the screen now has a visible stutter, enough to make dogfighting impossible.
Literally was playing some yesterday and everything was butter smooth (at 60 fps) didn't change a thing on the computer, and today all jittery, even though it says 60 fps I don't believe it.
dxdiag:
System Information
------------------
Time of this report: 12/18/2016, 15:20:31
Machine name: KIRK-PC
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr.161007-0600)
Language: English (Regional Setting: English)
System Manufacturer: MSI
System Model: MS-7850
BIOS: BIOS Date: 02/16/16 13:45:09 Ver: V4.11B0
Processor: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz (8 CPUs), ~4.0GHz
Memory: 16384MB RAM
Available OS Memory: 16332MB RAM
Page File: 2998MB used, 29664MB 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 64bit Unicode
------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Sound Tab 3: No problems found.
Input Tab: No problems found.
--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)
---------------
Display Devices
---------------
Card name: NVIDIA GeForce GTX 970
Manufacturer: NVIDIA
Chip type: GeForce GTX 970
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_13C2&SUBSYS_39753842&REV_A1
Display Memory: 3726 MB
Dedicated Memory: 4007 MB
Shared Memory: 3814 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: 2752H
Monitor Id: AOC2752
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: HDMI
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 21.21.0013.7270 (English)
Driver Version: 21.21.13.7270
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 8/25/2016 14:28:29, 17463088 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-5082-11CF-9447-78191BC2D835}
Vendor ID: 0x10DE
Device ID: 0x13C2
SubSys ID: 0x39753842
Revision ID: 0x00A1
Driver Strong Name: oem22.inf:NVIDIA_Devices.NTamd64.6.1:Section032:21.21.13.7270:pci\ven_10de&dev_13c2
Rank Of Driver: 00E62001