I have 2 x 160GB X18-M G2 in Raid0 in my laptop on win7 64-bit.
How long does it take to load? My boot time is about 12-14 seconds. I had to disable a couple of startup processes that I didn't need and I disabled GUI boot. Have you run a benchmark to determine your read/write speeds?
Are you updated to the latest Intel RST drivers?
There are a few tweak guides out there to assist with reducing boot time.