This will be self explainatory so i will just list prices.
Pentium 4, 2.0Ghz(400Mhz FSB) = $112 US
Pentium 4, 2.26Ghz(533Mhz FSB) = $113 US
Pentium 4, 2.4Ghz(533Mhz FSB) = $115 US
Do you see where im going with this yet?
Your motherboard will support the 2.4ghz CPU at 533Mhz FSB, so why are you wasting your time on a slower obsolete CPU that costs the same as one that is way way faster?
Say the following with me "pricewatch is your friend" very good.
<A HREF="http://www.pricewatch.com " target="_new">http://www.pricewatch.com
Have a nice day.