I would like to know how to pronounce 48x Cd-Rw. The problem is how to pronounce the "x" in the context of computing.
In my experience, a "48x CD-RW drive" is read out either as a "forty eight speed rewritable drive" or as a "forty eight ex rewritable drive". The former is the preferred option (random video from Lite-On). The latter is more colloquial.
The symbol x is pronounced times there and in a number of other contexts as well. You can remember this by thinking of arithmetic:
Notice how the wikipedia article carefully uses an x symbol that floats a little higher than the letter you can type on your keyboard. In a book I wrote recently with a lot of need to write about "a 20 times speedup" and the like, we got our copy editors to substitute that "times" symbol for the letter x. But on a product label you would probably not notice the difference.
If you did say forty-eight ecks people would probably understand you though.
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