Sorry if this has been discussed before. Following are my partner's general specs on his very brand new computer: Intel Core i7-3930K (Six Core, 12MB Cache) Overclocked up to 4.1Ghz 16GB Quad Channel DDR3 at 1600MHz Dual 2GB GDDR5 AMD Radeon HD 7870 2TB RAID 0 (2x 1TB SATA 6Gb/s) 7,200RPM Windows 7 He's tried the SL viewer, Phoenix, and Firestorm. With shadows enabled and without. No matter what he does, he's been crashing every 10-15 minutes. Any idea what might be the cause or what he can do to fix this? Thanks for any help and/or suggestions!