Nero 2014 Platinum Burning Rom cannot write 1x or 2x speed on CD-R

I am trying to use Nero 2014 Platinum burning Rom to burn CD. The minimum speed is showing 4x on both of my two friends' computers. Most audio engineers recommend 1x or 2x because of less error rate and good for old CD players' detection. Is there anyway to select lower burning speed rate? Also, is the writing speed determined by the software or hardware?

I would like to resolve this issue before purchase one for myself.
The two burners are:
Matshita BD-CMBUJ141AL
Pioneer DVRTD08RS

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