Santa Rosa-dedicated Merom Core 2 Duo not Supported by Napa Refresh Mac Intel

Merom processors dedicated to the Santa Rosa platform support 800MHz FSB and are named as T7X00, where X is an odd number. Previous Merom supporting only 667MHz FSB (Napa Refresh platform) are named as T7X00, where X is an even number; and are much more expensive despite the fact of being "older".
We have tried to install a Merom 800MHz FSB processor on a Mac Intel based on the Napa Refresh (667MHz FSB), a Mac mini. But no chance, even though pin numbers are the same, as well as the socket, it did not work. After looking into Intel database, we found out that the founder while using the same socket, pins rotated 90°, making such CPU and platform incompatible.
So, if you own a 667MHz Napa Refresh-based Mac Intel (first iMac Intel and Mac mini) you will only have choice among 667MHz FSB Merom processors, currently more expensive, to upgrade your computer. Once the Mac mini was disassembled we tried a pinmod to overclock the FSB to 800MHz, but here again it did not work. The modification was simply ignored.