I've recently bought 2gb RAM but it doesn't work on my computer. Software like CPU-Z and PC Wizard picks it up but it doesn't register with Vista. After running PC wizard I found out that the RAM i bought is single rank while the RAM originally in my PC is double rank. I have an asus berkeley motherboard. If more information is required just let me know. Help would be greatly appreciated.

Use the memory scanner at http://www.crucial.com any memory bought there is garaunteed to be compatible.

Here's the specs for your board: http://h10025.www1.hp.com/ewfrf/wc/... You've told us nothing about your RAM. What brand is it & what speed (DDR2-533, DDR2-667, DDR2-800, etc)? According to the link above, your board supports up to 2GB per slot for a max of 8GB. If you have no other RAM installed other than the new 2GB & the system is working, it would appear that there's nothing wrong with it. Where are you checking the memory amount in Vista? My Computer > Properties? Task Manager > Performance tab? "If my answers frighten you then you should cease asking scary questions" - Jules Winnfield (Samuel L. Jackson) in Pulp Fiction

It's DDR2-667 and I've tried running my computer with the new RAM by itself but it won't boot up.