Here are The Sims 3 PC System Requirements, Good news for most as there is no multicore CPU requirement but still a bit heavy for normal laptop users with the dedicated video requirement :

PC Desktop
* Windows XP (Service Pack 2)
o Processor Pentium IV 2.0 GHz / Athlon XP 2000+
o Memory 1 GB
o Graphics GeForce FX 5900 / Radeon 9500
o Graphics Ram 128 MB
* Vista (Service Pack 1)
o Processor: Pentium IV 2.4 GHz / Athlon XP 2400+
o Memory: 1.5 GB
o Graphics: GeForce FX 5900 / Radeon 9500
o Graphics Ram: 128 MB

Laptops
* XP (Service Pack 2)
o Processor: Pentium IV 2.4 GHz / Athlon XP 2400+
o Memory: 1.5 GB
o Graphics GeForce: Go 6200 / Radeon mobile 9600
o Graphics Ram: 128 MB
* Vista (Service Pack 1)
o Processor Pentium: IV 2.4 GHz / Athlon XP 2400+
o Memory: 2.0 GB
o Graphics: GeForce Go 6200 / Radeon mobile 9600
o Graphics: 128 MB

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