2 questions:
a)Could your PCIe link be another HT link ? Together with the link on the opposite side it could be 6 HT links together. The link on the top right actually looks like one of the double row links of Shanghai inbetween/ behind the L3 caches:
You named it HT2 & 3 in that picture:
http://chip-architect.com/news/Shanghai_Nehalem.jpg
But maybe they just copy/pasted it .. ;-)
Bookmarks