Ripsaw5165 10 Posted January 29, 2011 (edited) I was bored last night so I went into Device Manager (Windows 7 64bit) and checked if any of my System device drivers had updates available. Right click a device in the list, chose "Update Driver Software", then the "Search Automatically for Updated Software" option that searches online for updated drivers. Several devices found updates, but I think it was the update for the "Mobile Intel® 4 Series Chipset Processor to DRAM Controller - 2A40" update that caused it, since we know Arma 2 is somewhat sensitive to the speed and handling on system RAM. What did it cause? After updating several device drivers this way and rebooting I ran Arma 2 Combined Operations (1.08/1.57)... well, I noticed significantly more stuttering. Also dropped about 1 fps in each of the in-game benchmarks. I keep the Bohemia Interactive folder and sub folders defragged with a 3rd parrty defragmenter so it wasn't any fragmentation that crept in since last time I played (just the day before). So I went back into Device Manager and did the "Roll Back Driver" procedure on each one that had been updated (about 10 in total including the iterations of the PCI Express Root Ports 1 through 6). After finishing all the roll backs and rebooting I ran the game again and sure enough, the stuttering was gone. The game was never stutter free from day 1, but stuttering was minor and random. Updating the system drivers the way I did clearly introduced more stutter and rolling them back to the original version the notebook shipped with (Windows 7 build 6.1.7600.16385) resolved it. SMBus Controller and LPC Interface Controller were two more system devices that got updated along with the PCI Express Root Ports and the DRAM Controller so perhaps it was one of them, but who knows. Interesting experiment. Edited January 29, 2011 by Ripsaw5165 Correct typos Share this post Link to post Share on other sites
