That's very interesting.

Loads of people into 'modding' computers, always choose arctic silver
over any other compound or paste.

Is it just marketing hype and the reputation?

Thermal conductivity is about 8.4
for arctic silver, a quick search on one of my chinese supplier's
website were selling a silver compound with TC of 4.7mW/K.

Does this mean the cheaper one has a higher heat capacitance than
arctic silver?