MySQL Server load

I have a Facebook application build with PHP/MySQL, both are installed in the same server.

The server have a high load now, and I want to order a new server only for MySQL Server, Server stats today :

4.5 M Queries / day.

164.57 k Queries / hour.

2.74 k Queries / minute.

45 Queries / sec.

What is the best server hardware configuration for a dedicated to handle the triple of thi开发者_JAVA技巧s traffic ?

Best Regards,

I optimized the php code, and I started to use eaccelerator and a load balancing solution :) Thanks very much for help!