I have spoke to a hp technician and before buyin my cpu and was told :
( Your system board is compatible with:
the following Intel Core2 Duo processors (2-MB L2 cache, 800-MHz FSB):
T5900 2.2-GHz processor
T5800 2.0-GHz processor
Intel Core2 Duo processors (3-MB L2 cache, 1066-MHz FSB):
P8600 2.4-GHz processor
P8400 2.26-GHz processor
P7350 2.0-GHz processor
Intel Core2 Duo processors 6-MB L2 cache, 1066-MHz front bus (FSB)):
T9400 2.53-GHz processor
T9600 2.8-GHz processor
Your notebook has BIOS support for more processors than most do. You chose wisely )
i have GL40 CHIPSET witch i have been told will only run up to 800mhz not 1066mhz . or am i missing something .???