10.5.7
 

hi need some help with my system, i just installed 10.5.7 on my asus maximus extreme and the ram speed is not showing properly, how can i fix this, what driver or patch do i need to install?

If you mean in System Profiler, its related to AppleSMBIOS not being patched or maybe you overwrite it if you did an update.
You dont need to worry too much though as the info displayed there is for report purposes only, it doesnt mean your RAM is working slower (or faster) than it should...