Topic: FF400 Win7 x64 Asio Problems

I have a big Problem.

I use FF400 Win 7x64. AMD 6400+ 4gb RAM. Cubas 5.1.1

Whenn i start a cubase session with plugins like Lexicon reverb or other then the asio and cpu usage go up to 100 %.

i had the buffer size from the ff at 1024 it dont works. I have change the power mode, i have reinstall cubase, the rme driver etc. but it dont works. The thing is, when i put in cubase the standard driver the asio latency goes down. Only by the fireface driver it goes up.

Please help me