Does CPU Speed matter over Multiple cores?

[Becquerel]

Title explains it all because Im curious.

Processor Specs: AMD A6-3400M APU with Radeon(tm) HD Graphics, 1400 Mhz, 4 Core(s), 4 Logical Processor(s)

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[Ethan]

Depends what you are doing, and the general architecture of the cores.
It's important to stay above, I'd say about 2.5GHz for today's computing. However I would not buy a computer with less than 2 cores nowadays.

[Skorpion]

Hrm... I think I may be able to he-
Processor Specs: AMD A6-3400M APU with Radeon(tm) HD Graphics, 1400 Mhz, 4 Core(s), 4 Logical Processor(s)