Dell :: M1530 Graphics

I was just wondering if anyone thinks that my graphics (8600GT 256MB GDDR3) in my M1530 is going from the following:

1. Laptop is 8 months old, I use it mainly for gaming and on average over those 8 months I would say I play games for at least 3 hours a day.2 weeks ago I bought Fallotu 3 to play it with mods, thats when these issues turned up which are:After playing for a little while, the graphics went all 'strange', moving in game was impossible, alot of the textures went purple then BSOD. (15 days ago)The game crashed on exit (not unusual if you know FO3 or Oblivion), then BSOD. (8 days ago)Similar to the first one, however the screen went 'speckly' and you could see different parts of the level (as if I had noclip on). I exited the game, but the 'speckles' were still present in Vista, including the shutdown screen. I turned it off and then on again and it was fine then. (Yesterday)Finally, similar to the above with the noclip style look, just no speckles, but I managed to exit the game, shutdown, restart and everything was fine again, infact I played for 4 hours straight after that. (Yesterday)
Unfortunatly I didn't get chance to read the BSOD errors.

Also bare in mind that I have played Fallout 3 for several hours each day since I got the game (16 days ago) without any serious issues (a few CTDs, but thats normal for FO3).

Apart from these issues I have never had a BSOD with this laptop, and very few other crashes that weren't 'understandable'.

So my question is; is this the starts of the NVidia GPU issue? Should I get a replacement or wait for more information?