dvd-4 4x vs 2x

[xandrr]

I just bought a NEC 1300a dvd burner and burnt with no problem using some memorex dvd's from compusa. The dvd's played fine everywhere (in home player too and burnt perfectly). I noticed that there wasn't any speed listing (2x or 4x) on the package, and I just ordered some 4x memorex's off amazon. I was wondering if 4x dvd-r's will burn at 2x, and not give any different problems playing in your home dvd player. My burner is a 4x, but for some reason, with the dvd-r's i did buy, it only gave a 2x burn option in nero.

So my question is could you burn a 4x dvd-r at 2x? Also, Can you use a 4x dvd-r in a 2x burner (just wondering). Also, if a 2x memorex dvd plays in your home player, is a 4x memorex dvd likely too?

Sorry for all the dumb questions, i'm new to all this.

[twodogs]

mate, I have an LG 2x burner and all i use to burn are 4x dvd-r media. no probs at all on any standalone dvd i've thrown them at.