Can a technomancer get 5 Matrix IP by any other method than collecting the overclocking and advanced overclocking echoes?

Take the mundane route with tech but that would require a link which is counter to a TMs abilities in the first place.

I was more looking at combining echoes - sorry for not making that clear.

Ohhh I gotcha. Um not that I could see. Thats the point of overclock and advanced overclock. To give you more IPs in the trix.

So can you get to 5 without Adv. Overclock? Eg Biowire, Acceleration + Overclock?

4 IPs yes but unless your GM is willing to twist some rules Advanced overclock is specifically there to break that wall separating you from the 5th.