Re: Bad performance on notebook with AMD A6-3400M
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If you check this link http://help.ea.com/au/article/need-for-speed-rivals-pc-system-requirements/
IMO, it is your proccessor's fault ☹️
Your processor's (AMD A6-3400M) core is clocked at 1.4 GHz base clock speed and is able to automatically overclock up to 2.3 GHz (TurboCore, depending on temperature and used cores).
NFS games don't like automaticall overclocking. Try to set processor clock manually* to 2.3 GHz. (*How to manually overclock? Hint https://www.youtube.com/watch?v=h4PnRMGM8ng)