What revision is your motherboard? It depends on the revision of the
A7V333 that you have. If it's an older revision, (1.x) it does not
support this processor. If it's revision 2.0, I believe it will
support 333MHz FSB processors or at least most of them. I have an
Asus A7V333 motherboard myself, and I upgraded to an AMD Athlon XP
2400+ because I have an older revision. (I would have gone much
higher if it supports it.) I think it supports up to the XP 2600+
266MHz FSB version if it's the older revision. If it's the 2.0
revision, I believe it's the 3000+ 333MHz FSB. My second question to
you is, if you can get the 2800+, do you have at least PC-2700 RAM?
http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us&mode
l=A7V333