Laptops 667 Mhz RAM for 533 MHZ Chipset

[xspeedcruiser]

ok i've zeroed in on 5583, but it comes with a 512MB RAM, so i'm upgrading it to 2GB
The chipset supports 533MHZ RAM but the Processor, T5500, has a FSB of 667MHz
Now should i go for a 533MHZ Upgrade or 667 Mhz RAM, price wise they hardly make any differnce. How will the performance of system be affected if the RAM has higher speed than the chipset.
Thanks for the answers

 

[nukeu666]

ram will work at a lower speed automatically

 

[ultra vires]

chipset supports 667Mhz .. coz i have been running my laptop with those speeds

 

[xspeedcruiser]

thats great... the info on acer site says it supports chipset supports 533MHZ only..
Products - Notebook
someone should tell those guys how lame their site really is

 

[ultra vires]

actually they are rite coz they do supply you with 533Mhz module
so they have advertised that but the chipset does support 667Mhz