That is not your drivers giving you that big difference. Your low score is with your system clocked at 1830MHz and a FSB of 166MHZ...Your high score is with your system clocked at 2205MHz and a FSB of 219MHz. You really should be careful about what you post because now people are gonna want your "magic" drivers when it was for the most part higher overclocking that got you the higher score.
Hammer