Ob die Fehler auch ohne Treiber auftreten kann ich nicht 100%ig sagen, ohne Treiber hab ich ja nur 640*480 pixel und 16bit farben, konnte jedenfalls nichts erkennen.
da der fehler aber schon beim windows bootlogo auftritt vermute ich dass es treiberunabhängig ist, ( zumindest was Nvidia treiber anbelangt ). im moment habe ich den Forceware 93.81, habe allerdings auch schon mit einer älteren version versucht, ohne erfolg.  
mir ist eben aufgefallen, dass sobald ich auf 16 bit umschalte, das muster verschwindet, -> doch video memory defekt?
Hier noch ein teil des Logs vom Burnintest V5.3
PassMark BurnInTest Log file  -  http://www.passmark.com
========================================================
BurnInTest V5.3 Std 1005
Logging detail level: Normal
*** Unlicensed Shareware Version ***
******************
SYSTEM INFORMATION
******************
Network Name: ABGAS
Date: 05/28/07 14:10:49
Operating system: Unknown or new O/S Service Pack 2 build 2600
Number of CPUs: 1
CPU manufacturer: AuthenticAMD
CPU type: AMD Athlon(tm) XP 1800+
CPU features: MMX 3DNow! SSE PAE 
CPU1 speed: 1525.3 MHz
CPU L2 Cache: 256 KB
RAM: 511 MB
Video card: NVIDIA GeForce FX 5200 (Resolution: 1280x1024x32)
Disk drive: Model HDS728080PLAT20 (Size: 76.7GB)
Disk drive: Model IC35L060AVVA07-0 (Size: 57.3GB)
Optical drive: _NEC DVD_RW ND-3520A
Optical drive: TOSHIBA ODD-DVD SD-M1802
Optical drive: IW3074P GCL418A SCSI CdRom Device
**************
RESULT SUMMARY
**************
Test Start time: Mon May 28 14:01:29 2007 
Test Stop time: Mon May 28 14:06:30 2007
Test Duration: 000h 05m 01s 
Test Name                   Cycles   Operations      Result Errors   Last Error
              CPU - Maths   45       3.148 Billion   PASS   0        No errors
               CPU - SIMD   35       4.414 Billion   PASS   0        No errors
             Memory (RAM)   2        577 Million     PASS   0        No errors
              2D Graphics   0        349             FAIL   160      Video memory corruption
              3D Graphics   1        2192            PASS   0        No errors
                Network 1   4        33440           PASS   0        No errors
           Video Playback   11       143             PASS   0        No errors
TEST RUN FAILED
******************
DETAILED EVENT LOG
******************
LOG NOTE: 2007-05-28 14:01:29, Status, Main Tests started
LOG NOTE: 2007-05-28 14:01:30, 3D Graphics, 3D test starting: Duty cycle = 50. Test on primary monitor (0). (x,y) = (310,0). WxH = 300x200. 
LOG NOTE: 2007-05-28 14:01:50, Video, Video test starting: Duty cycle = 50. Test on primary monitor (0). (x,y) = (310,400). WxH = 300x200. 
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:07, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:07, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x55d55555: Expected 0x55555555: Read 0x55d55555
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x80075f: Expected 0x75f: Read 0x80075f
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x80175f: Expected 0x175f: Read 0x80175f
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption
LOG NOTE: 2007-05-28 14:04:08, 2D Graphics, 32 Bit ==> Offset 0x80275f: Expected 0x275f: Read 0x80275f
SERIOUS    : 2007-05-28 14:04:08, 2D Graphics, Video memory corruption