[bluedino]

Could Intel stick more than one on a single chip?

[tadfisher]

Yes, but so far they have not, instead investing in on-die mesh interconnects for scaling up core count. Here's an opinion piece on the subject: https://www.anandtech.com/show/12814/a-thought-on-silicon-de...

[CarVac]

Their first dual-core processors were multiple chip modules.

[zeusk]

They however did not have a proper on-die interconnect and instead communicated over the FSB which made them quite bad at scaling.