My XP 2600M runs at 200 fsb very well on my Abit NF7 rev2. I usually keep it at 200x11, but it runs stable at 200x12. However, my XP 2400M will NOT run at 200 fsb no matter what the multiplier on my Asus A7N8XE deluxe, even using the memory from my NF7. Don't know why. Both are cooled with a Vantec Airflow HS (with its TMD fan) - which I like very much.