In some instances or in most cases ppl. get about 2.1 - 2.3Ghz out of there 1700+....many things factor into this...
Motherboard (quality, chipset, etc.), Ram (Quality, type, etc.) and Cooling....aswell as stepping of CPU.....remember not all CPU's OC the exact same.....
as for the 2400+ there is no gaurantee that the 2400+ will overclock just as much as a 1700+...remember...in percentage wise anyways.......if a 2400+ can OC to 2.4Ghz thats a 400Mhz Overclock.....If a 1700+ can OC to 2.4Ghz thats roughly a 1000Mhz Overclock.....thats a BIG difference....if say that with a 2400+ u prolly have a better chance of getting 2.4Ghz than with a 1700+ but than again theres no gaurantee that either will do either speed.....esentially id say AMD is making 1 CPU right now (not including the Barton core).....there producign awesoem yields for the 2800+ so they just reprint all there other CPU's as 1700+, 1800+, 1900+, 2000+, 2100+, 2200+, 2400+, etc. etc.
So really my $50 US 1700+ is the exact same CPU as that $300 2800+ the next guy just baught........remember this is not actual...but it DOES indeed explain a lot...like how 95% of peoples T-Bred 'B' CPU regardless of Speed designation (1700, 1800, etc.) in MHz r hitting AT LEAST 2600+ and higher speeds...
<A HREF="http://www.anandtech.com/mysystemrig.html?id=13597" target="_new">-MeTaL RoCkEr</A>