Last holiday season I was in your shoes: obsessed with breaking 10K for 3DMark2001 with my Ti4800SE (equals Ti4400 AGP8x).
Finally I noticed all the people who scored higher with the same card had higher FSB. So I set my CPU multiplier lower and my FSB higher keeping the clockspeed about the same (1600 MHz). This is what ultimately gave me five digits of 3DMark with a video card that topped out at 300/700.
Try to tweak your FSB. Your machine may be CPU limited, but the Ti4400 card certainly can break 10K 3DMark2001.
I used to drive a Heisenberg, but whenever I'd glance at the speedometer, I'd get lost.