Will sata 1 work witg sata 3 slots?

Killermasa69

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Jun 7, 2015
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I am building a new pc and was wondering if I can use my old PCs HDD and optical drive. They are using sata 1 and my new motherboard will have sata 3 slots. I will buy a new HDD too.
 

Camikazi

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Jul 20, 2008
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I would like to add to USAFRet's answer that it will work just fine but it will only run at SATA I speeds (150 MB/s).