October 10, 201114 yr When I first installed PMDG 737 on my Q6600, 4Gb, WinXP/32 system, I was plagued with OOM erors and instability, irrespective of how it was tweaked, and I tried numerous tweaks... Installed Win7/64 on the same system, reinstalled FSX with the same add-ons and have not had a problem since. In my view a 32bit system is marginal, you may be fortunate and have adaquate performance or like myself find no-end of problems. If in doubt do an upgrade to Win7/64 and you have the best chance of success. Gerard Marley
October 10, 201114 yr Like others above, I initially ran FSX with Win XP 32bit and had continual OOM errors. Since moving to Win7 64 bit I have not had any! HowardMSI Mag B650 Tomahawk MB, Ryzen7-7800X3D CPU@5ghz, Arctic AIO II 360 cooler, Nvidia RTX4090 GPU, 32gb DDR5@6000Mhz, SSD/2Tb+SSD/500Gb+OS, Corsair 1000W PSU, LG Ultragear 48"4K, MFG Crosswinds, TQ6 Throttle, Fulcrum One YokeMy FlightSim YouTube Channel: https://www.youtube.com/@skyhigh776
October 10, 201114 yr I still get OOM's on Win7 64, FSX cannot use the additional memory i have, it can use about 3.2GB then anything more will cause a OOM. Ian R Tyldesley
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