To my knowledge, no and no on the hardware firewalls. I could easily be wrong though as I haven't studied either chipset in any depth.
As for your DEP, it's called something different by everyone of course, but basically only new stuff has it. Some new Intel chips have it. A64 and up from AMD should all have it. (I think. Again, I could be wrong. No one is perfect.)
<pre>
<font color=purple>I express to you a hex value 84 with my ten binary 'digits'.
</font color=purple></pre><p>@ 185K -> 200,000 miles or bust!