CDR for Data vs Audio

[fate]

Originally posted by bighap
Audio cdr are used for stand alone cd burners. All other cdr is used for pc cd burners, which includes making audio cds.

Thanks. So those CDRs that read "700 MB/80 min" mean that it can be recorded both from a pc and from standalone cd burners.

Sorry for the questions, but I bought two spindles of CDRs yesterday and I didn't notice that both read "700MB" but no mention of 80 min., that is usually what I find in other models/brands that I have bought before.

I bought these ones:
Taiyo Yuden, That's label non ceramic, non label
http://startlab.co.jp/products/700MB/80ceramic.htm
and Memorex, that reads it cannot be played on 1x/2x readers
http://www.memorexlive.com/products/media_cdr.php

So, I shouldn't return these ?