You can add Asus P6T Deluxe V2 0504 to the wall of shame. This thing throttles like crazy. I have tried two chips: 920 and w3520. And both start to throttle at about the same CPU temperature. Confirmed with realtemp and hardware monitor, AND the turbo tool alone.

When hardware monitor reports CPU temp (tcase) greater than equal to 68C (tcasemax is 67.9C or something like that), multi falls to 20.5 in realtemp. I think the throttling is tied to tcase rather than TDP. The output power doesn't change with lowering my ambient temperature but CPUTIN does. And so does the throttling. I think we are way past the TDP limits (130W or even if 150W) at 4.2Ghz and 1.35v vcore anyway. And my D0 throttled at 1.225vcore doing 4.2Ghz. My w3520 throttles at 1.35vcore at 4.3Ghz. Same tcase temps in both situations.