No, SSE drops off at when overclocked. L2 drop off is also a problem on early models if you looks deeper.
Some say voltage causes it, some say sub zero temps cause it. Oppainers listing states -8c with massive 220w pelt and chiller.
Oppainter the "US" one has a AIRGA 0224 like other ones above him.
If you check the Tbird database you will see more SSE and L2 dropping out.
You are limited to what your mind can perceive.