Hi, I have a new machine (1 month) on which I am getting continual f4 (mainly) and 7a (sometimes) BSODs, usually while playing Battlefield 3. Sometimes on the ensuing re-boot after the BSOD, right after windows and the desktop have come up, the SSD activity light is on and the computer freezes, then BSODs again. System details: 2600K CPU Asus P8P67 pro m/b On-board Realtek audio Corsair Vengeance 2x4 GB 8-8-8-24 RAM Corsair HX1050 PSU Corsair Force 3 120 GB SSD (O/S and game files) Seagate Barracuda 1TB HDD EVGA GTX 570 SC (x2 SLI) (factory overclocked to 797 MHz vs. 732 MHz) Windows 7 64-bit O/S I normally have the system mildly overclocked (4.0 GHz vs. 3.4 stock). Here is what I have tried: --making sure I have current version of BIOS, chipset drivers, audio driver, graphics driver, SSD firmware --Removing overclock on CPU and GPU --Setting and raising Vcore (to 1.17 V) --Setting RAM voltage to 1.55 V (vs. 1.50) --Setting VCCIO to 1.10 (vs. auto) --Removing Norton antivirus (currently running MS Security Essentials) The BSODs occur at random times and intervals, but normally the first one does not happen until I have been playing BF3 for at least 30 minutes. I thought it may be heat related, but I opened my case cover and put a room fan directly on the boards (which lowered GPU temps to 72C and CPU to 50C), but still got BSOD. Sometimes while playing BF3 I get a loud buzzing loop for a few seconds followed by the BSOD. Other times it is more gradual. I lose part of the graphics, but the game is till running. 30-45 seconds later I get the BSOD. Again, another clue is that sometimes after a BSOD playing BF3, the ensuing boot-up causes a BSOD before I really start doing anything. Any help would be much appreciated. Dump files, CPU-Z images are attached in zip. Thanks!