Thanks for all the answers... 1) Here is my setup:Asus P8P67 Deluxe Rev3.0 Socket 1155 Intel PSU Thermaltake Toughpower XT 875W 80plusCPU Intel Core i5-2500K 3.30GHz Socket 1155 95WMicrosoft Windows 7 Home Premium 64bit Service Pack 1CPU Cooler Scythe Mugen 2 Rev.B Socket IntelRam DDR3 G.Skill Ripjaws-X F3-12800CL7Q-8GBXM 1600MHz 8GB (4x2GB) CL7-8-7-24 1.6vVGA Palit GeForce GTX 560 Ti Sonic Core 900MHz Memory GDDR5 4200MHz 1GBHard Disk Western Digital Caviar Black 500GB 3.5" 7200rpm 32MB SATA3SSD Corsair Force 3 120GB 2.5" SATA3SOUND BLASTER AUDIGY SE 7.1 BULK 2) I use ENB Series but it's the same if I don't activate it 3) It's a fresh install of Win7 and FSX...it worked for me for about 1 month until just yesterday begun with this strange behaviour 4) No stock cooler: PU Cooler Scythe Mugen 2 Rev.B Socket Intel 5) System Event Viewer: I checked it and can see the unexpected reboot and some error messages of about 10 minutes before (I don't think they're relevant) 6) Turned off auto-reboot but no error message displayed 7) Runned 50 minutes of Linx -> no error. Run Memtest -> no error Just a detail I figured out...I think it's all about my VIDEO CARD.I run FurMark which is an utility to test/stress video card and as soon as I activate the graphic test my PC reboot like when I'm in FSX with no error message... What could it be? My PC is brand new just 1 month...

Sounds like your graphics card needs to go back.

Are you supposed to defrag a SSD?Dennis

Are you supposed to defrag a SSD?Dennis

No, never

I didn't defrag ssd Do you think my video card is faulty?

I didn't defrag ssd Do you think my video card is faulty?

That's what it looks like. Do you have another card or possibly onboard video you could use to see if it still crashes with a different gpu? Maybe borrow a card from a friend?

You bought an ati theres your first problem lol kidding do you have any problems with other games with your card, never had an ati so can't help you much there, a video card or a bad power supply could be the problem is this happening all the time in flightsim or once in a while, you may have a bad power supply or video card my money would be on the power supply new or not it happens, you have not listed your components you should.

Hi,I've a problem with FS-X and PMDG 737 NGX. After 1 month where I hadn't any problem...now I begin to see this strange thing: after 10 ' of flight the PC reboot itself without any error message! This happens with PMDG 737 NGX but also tried with Red Bull standard MFSX plane. I tested with Linx stability and memtest and it's ok, no overclock on my i5-2500K + Nvidia GTX 560 Ti with latest driver. the only thing I've done recently is defragmentation of the unit where I keep documents and UTX, GEX installations.The other SSD (which I didn't defrag) contains win 7 64bit, fsx and add-on What could it be??

I had the exact same issue that was resolved by updating drivers for GPU and sound card. If it's still not solved, make a ticket - they got it solved for me!Good luck :)

Yup Pete, do the easy & cheapest first to eliminate those possibilities, to determine hardware need to know if its only happening in flightsim ?

Just a detail I figured out...I think it's all about my VIDEO CARD.I run FurMark which is an utility to test/stress video card and as soon as I activate the graphic test my PC reboot like when I'm in FSX with no error message... What could it be? My PC is brand new just 1 month...

It may well be that you have a bad GPU, but one other thing to check... I recently put together a new dedicated FSX computer, with a new P67 mobo, I7-2600K CPU, top-rated ultra heavy-duty power supply, and a new GTX560 video card. For the first week I used it, everything was absolutely perfect - FSX had never run so well, or so smoothly, even with complex aircraft and almost all sliders maxed. Then, I began to have the same issue as you. After starting FSX, everything ran well for a few minutes, then BAM! Without warning the computer would simply reboot, just as if I had hit the reset switch. It seemed as if this would only happen when running FSX, but not until I had been in-game for a few minutes. At first, I thought it might be due to to having a complex aircraft loaded, but soon found that it would happen even when using the default 172, and with weather set to "clear". I suspected overheating, but when I ran CPU/GPU temperature monitor software along with FSX, the temps never got above 60C - but the spontaneous reboots kept happening. I backed out my (modest) 4 GHz O/C, and actually down-clocked the CPU to 2.5 GHZ, but it didn't help. Before long, the reboots started happening just while running the Windows desktop with no other programs loaded - and finally, I started getting reboots even while trying to start the computer - it would happen even before Windows fully loaded on initial start-up - over and over again. I was pretty sure that something was seriously wrong hardware-wise. A failing GPU, CPU or perhaps a bad motherboard chip or RAM stick. I took the side cover off the case. My intention was to pull out the GTX560, and put my original 280 card back in to see if it was a GPU problem. Lo and behold, when I just barely touched one of the two aux 4-pin 12 volt power cables connected to the video card - the connector on the cable popped right out of its mating socket on the GPU! Apparently, when I assembled the system, that particular cable had never fully seated in the socket - the plastic tab on the side of the connecter that locks in in place must not have engaged. After the initial assembly, I had tie-wrapped all the various power and data cables to neaten up the installation - but in so doing, put that one cable under some tension - which over time, gradually caused the connector to back out of the socket to the point where the pins must have been barely making contact. I corrected that problem, and then carefully inspected all of the other power cables, going to the mobo, disk drives etc. To my chagrin, I discovered that the 6-pin 12 volt cable connected to the motherboard was also not fully seated! It wasn't as loose as the aux power cable going to the videocard, but it was not locked in place either - and may have been contributing to the problem too. After correcting the wiring issues, the computer has been running flawlessly ever since - I can run FSX with the NGX or any other complex add-on for hours on end with no issues. I'm not saying that this is the case in your installation. You may indeed have a piece of flaky hardware... but for you, or anyone else experiencing spontaneous re-boots, I'd strongly recommend a careful check of each and every power connector to insure that they are fully and securely seated. If you use a modular power supply, be sure to check the connectors that plug into the PSU itself, as well as the other ends of the cables where they connect to the motherboard, GPU etc. A poor connection might be all that is actually wrong in the system.

Had exactly the same problem some years ago with my previous PC: under load it would just reboot. Turned out it was dust in the PSU that made it overheat, or caused some other problem, such as not being able to supply stable enough power to the graphics card. Give it a good clean-up, which is free, and you'll be able to exclude this cause if the problem persists in the worst case, or you'll manage to fix the problem without sending back faulty components that possibly aren't that faulty.

I had same problem last year pc kept on rebooting, tried to find the cause but couldnt, finally had to take it to the local pc shop which they couldnt find the cause of it. Finally i had enough and had the pc for a few years and decided to upgrade to what i have now. The old pc still sits behind me collecting dust Least it gave me the new pc

I corrected that problem, and then carefully inspected all of the other power cables, going to the mobo, disk drives etc. To my chagrin, I discovered that the 6-pin 12 volt cable connected to the motherboard was also not fully seated! It wasn't as loose as the aux power cable going to the videocard, but it was not locked in place either - and may have been contributing to the problem too. After correcting the wiring issues, the computer has been running flawlessly ever since - I can run FSX with the NGX or any other complex add-on for hours on end with no issues. I'm not saying that this is the case in your installation. You may indeed have a piece of flaky hardware... but for you, or anyone else experiencing spontaneous re-boots, I'd strongly recommend a careful check of each and every power connector to insure that they are fully and securely seated. If you use a modular power supply, be sure to check the connectors that plug into the PSU itself, as well as the other ends of the cables where they connect to the motherboard, GPU etc. A poor connection might be all that is actually wrong in the system.

I've checked all connector nothing seems wrong...

Had exactly the same problem some years ago with my previous PC: under load it would just reboot. Turned out it was dust in the PSU that made it overheat, or caused some other problem, such as not being able to supply stable enough power to the graphics card. Give it a good clean-up, which is free, and you'll be able to exclude this cause if the problem persists in the worst case, or you'll manage to fix the problem without sending back faulty components that possibly aren't that faulty.

PC is brand new...no dust!

Try setting the fanspeed on your Graphics card manually. NVIDIA sets there card fan speeds real low by default so they do not make a lot of noise. My 8800gtx was at 60 percent and getting hot so it set it at 75 percent no issues or reboot after. I think the GTX570 is even set to 40 percent and thats way to low. Not sure what the 560ti is set at by default. You can change the fan speed in Nvidia Control Panel.

Same problem here. 

 

PC Restart with PMDG NGX by passing top of decent. Flight with other aircraft is no problem. 

Only with the NGX. 

 

Did a reinstall of NGX a couple times and 2 times a reinstall of FSX but the problem still remains. 

 

What could it be? A virus? or something else? 

 

PC reinstallation is that an option? 

 

Thank you, 

 

Stefan