RAM Speed question

I have an Acer Aspire 5750 Laptop. SIW tells me that the maximum supported speed is 2 x 533MHz i.e. 1066MHz. The installed RAM is only 4GB and I have 2 x 4GB boards available. These though are specified at 1600MHz.

My question of course is will these work in the Laptop?

Thanks very much in advance.