Hi all, i have come across a strange problem with my rig that seems to only occur with GTR2. Firstly my rig. Mobo: Gigabyte 965P-DS3P CPU: Intel C2D E4300 @ 1.8Ghz, OC to 3.0Ghz CPU Cooler: Thermaltake Big Typhoon VX (replaced stock fan with b-cool 120) Memory: 4 x 512MB Corsair Twin2X 5400C4 Video: Gigabyte 7600GT Silent Pipe HDD: Seagate Barracuda 320GB 7,200 DVD: ASUS Light scribe PSU: Hyper Type-R 580W Case: Antec 900 OC Settings Multiplier = 9x FSB = 334Mhz PCI = 100Mhz CPU Volts = 1.35V All other volts are set to stock. Upon cold booting my PC I can run GTR2 no problems. If I reboot my PC and launch GTR2 it gets the stutters and my frame drops from 60+ to around 10 FPS. If I then switch back to stock clocks she is fine again. I also noticed if I leave my rig OC and switch it off for around 1 hour she will run GTR2 no problems, its only once I reboot. I have tried different memory but that did not fix it. I also noticed I was on an early BIOS version so I am in the process of updating it and giving it another go. Has any one experienced this before? Is there something else I should tweak in my OC settings? Considering she runs games like V8 Supercars 3 no probs I am at a loss to explain this. You advice and feedback is much appreciated.