Roca-QC on "How to make my slow site faster?"

[ Moderator note: title fixed. Please refrain from using "help" in the topic title. That's not useful at all. ]

good morning all!

so we got our site tuned a bit and down to a smaller load size, but it can be quick at times and then extremely slow other times...

anyone know why my site would do this?

http://www.groch.com/

we host our own server with a tested download speed of 17.57mbps & upload speed of 9.70mbps. the server is a brand new PowerEdge from Dell so that is plenty quick.

any help is very much appreciated!