Im not the first one and probably will not be the last, but I am going crazy with the g3d.dll ctd. I have been flying with no issues since I built up the new pc (see specs in my signature below) but now I have come to a point where I get a ctd on almost every flight. The ctd seem not to be OOM related, and occur mainly flying in Europe (I have UTX EU + several Aerosoft airports), and only during approach, getting closer to an addon airport. It almost never happens while flying in US (despite I also there have UTX USA + many addon airport installed), which makes me think it might be some sort of conflict between UTX EU and addon airports. It is not aircraft related as it happens using different a/c.Even though I recognise that I use very complex addons aircraft, such as the PMDG 737NGX, and a very high level of FSX settings, my PC has demonstrated to be capable to deliver very good performance even under the heaviest loads, as it has actually been performing extremely well for some months, with the same addons/settings that I currently have. Now I am having this annoying and repeated issue and I would like to avoid making a complete reinstall of everything so I am looking for some troubleshooting clue.I have read all the several threads on the issue but quite frankly I am still confused about how to proceed to try and fix the issue (if the fix does exists...!).So far, I have tried to rebuild the fsx.cfg (which is also optimised as per Boyote's online tool), reduced the scenery settings, running the sim without overclocking, flying with default a/c, removing AI traffic, but without any improvement: whenever I am performing an approach and I am within 60-70 NM range from a a major airport, I have a ctd. It may be important to say that when the ctd occurs the resources of the pc are hogged (I am having around 70% processor usage, and something similar for the GPU, with a GPU maximum memory use of 800 Mb, which for a GTX570 is not an extreme condition).If someone could give some good suggestion I would be quite happy..! I am not including in this post all my fsx.cfg and fsx settings to avoid making this post extremely long, but I would be more than happy to provide further details about my settings, even by e-mail, to anybody who could volunteer to provide some support.Thank youRegardsSorry....the topic title is oviously g3d.dll...!!