Windows 7: random BSOD when gaming, exiting games, or browsing the internet

First off, thank you in advance for any help, this problem has persisted for quite some time, and it is really starting to frustrate me. My computer has been experiencing crashes daily for a while now, and I strongly suspect my power supply is the problem, but I do not have very much experience with this problem. My computer will just crash without any warning whatsoever when I play TF2, Nexuiz, or any other game for that matter. I could be playing for anywhere from 20 minutes to 3 hours and get a crash at any point in between. Who Crashed and BlueScreenView point out ntoskrnl.exe more than any other driver, but occasionally it will point out my graphics driver, lan driver, or directx itself. I would be grateful if someone would analyze this data and give me their two cents.

Problem device:You are missing hard disk controller drivers. This may be vital for the system to functions properly. Please download and install any SATA drivers from your motherboard support site. Intel(R) Matrix Storage Manager Driver V8.9.0.1023 for Windows 32/64bit XP & Windows is listed under SATA for your motherboard and Windows 7 64bit: ASUS - Motherboards- ASUS P5Q PRO Turbo

Ok, thanks for giving me a hand in solving this problem, I should mention that I have formatted recently as a procedure in troubleshooting the problem, and I had this driver installed previously and still experienced bluescreens. I downloaded and installed it anyways and will update this thread if any more bsods happen. Also when I turned on my PC today, my bios settings all defaulted for some strange reason, it set my ram to 800MHz, configured all my drives as IDE as opposed to AHCI. Hopefully no more problems arise as a bad MOBO could be a disaster to deal with. Also, for some reason it defaults my HDD to take priority over the SSD in boot order, despite the fact that the SSD is connected to the sata port specifically designated for the primary boot drive in the manual, I really hope this is not a problem of incompatibility between newer hardware such as the SSD and older hardware like the MOBO.

SSDs do often have problems with motherboards that have BIOS versions older than 2011. Yours is 2009, so you may have to consider replacing the SSD with an HDD at some point as a troubleshooting step. If you do not get crashes with an HDD instead of an SSD, that would indicate an incompatibility between your older hardware and the SSD.

Well so far I have not experienced any crashes since the bios settings were reset. The only thing in the bios now that is different is that my dram frequency is set to 800MHz. My mobo and ram are both rated for up to 1200MHz, and I checked the timings when the ram was at 1066MHz and it matched up with what cpu-z said it should be at, I'll give it more time before believing this is the true problem, as I have not been able to stress test through gaming to try and cause a crash again (busy with work and school), but the small sessions I've had seemed to show more stability as TF2, the game that crashes most on my pc (not BSOD, but application crash) has not crashed once. As for the ssd, if that does prove to be a problem, could I use a PCI-e controller to run it, Because I did buy one that supported SATA 3 so I could get more speed out of my ssd, but I thought it might have been causing the crashes so I took it out a long time ago and never put it back in. it was a highpoint rocket 620

Difficult to say whether the PCI-E card would provide better support for the SSD. It adds another peripheral and increases the complexity of the system, which I try to avoid. It is better to keep things as simple as possible. However, it may at least be worth testing.

See how things go for now before adding another layer of possible problems. Once you have had a chance to test things more rigorously, post back how the system is responding, and then we can decide whether the PCI-E card is another option.