After several months of trying, I finally got Rage to load and was able to play. After my first session (about 30 minutes) I felt it was worth the wait and the effort. The game looked fantastic. A few hours later, I started the game again and all of the graphic detail disappeared. The characters are smooth and glossy. The landscape is puffy for lack a of better word. It still plays OK but it looks like crap. I've checked the forums and google but all I can seem to find is stuff about blinking or blacked out textures. I don't recall seeing any of that. I've also tried experimenting with different video settings to see if I could fix the issue but no luck so far. Can someone please HELP?

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.120504-1619)
System Manufacturer: Dell Inc
System Model: XPS 630i
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel® Core™2 Quad CPU Q9400 @ 2.66GHz (4 CPUs)
Memory: 3326MB RAM
Page File: 1394MB used, 3814MB available
DirectX Version: DirectX 9.0c (4.09.0000.0904)

Card name: ATI Radeon HD 5670
Chip type: AMD Radeon Graphics Processor (0x68D8)
DAC type: Internal DAC(400MHz)
Display Memory: 2048.0 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.7270 (English)
DDI Version: 9 (or higher)
Driver Date/Size: 6/11/2012 10:12:38, 305664 bytes