Why cant I get my CPU to run at the lower speed multiplier?

[Spooter]

I have set C1E to auto and set the multi to 8 in the bios but the speed still jumps to 2.5Ghz when running prime95.

My chip is the E5200 and board is Zotac 9300 ver4 ITX.

Thanks.

Any more info\questions let me know.