FS 2004 Flying and then Black screen and then it restarts

[usajet04]

[ATTACH=CONFIG]undefined[/ATTACH]I would be flying and then I get the Black screen and then it restarts. I have very thing on high and getting 25 FPS and more if I go to unlimited. Here are my spec.



Dell Workstation 490
2x Dual-Core Intel® Xeon® 5160 3.0GHz, 1333 FSB, 4MB L2 Cache, 80 watts
12 Gigs Mushkin Enhanced Proline DDR2 FB-DIMM ECC Fully Buffered DDR2 667 (PC2 5300)
Creative Sound Blaster X-Fi PCI-Express
1 Ghz EVGA GTX 560Ti DS Video Card
2 Western Digital VelociRaptor WDBACN3000ENC-NRSN 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s
Windows 7 Ultimate 64bit
750 watt power supply