How much RAM do you have?
I have upgraded to 16GB DDR3 from 8GB , two days ago and although DPC latency of ndis.sys is still high I haven't noticed any sutters/freezes since.
One other thing that I did in the same day that I exchanged my RAM was updating intel MEI firmware.
Wich did the trick (if it really did...will test further for that), I don't know...