Just remember the Athlon II's do NOT have an L3 cache onboard. Plus you are going form 3.0 to 2.8 GHz, so you will loose on performance. However, you have to determine whether the cost is justified.
If you are running a P4 with a 9800GT already, I don't see an issue. What kind of PSU is it? I'd be kinda iffy on it with new hardware. However, technically the AMD setup will draw less power than your P4.
oh wow! I am a gamer and the phenom x2 easily beats the athlon II x4 weird...I may have to go for the phenom, the only thing the athlon performed better on were things i dont use.
Exactly. You buy for what you use it for. Most games prefer faster dual cores over more cores at a slower clock. Plus in gaming there is alot of redundant data, so more cache allows it to access this redundant data faster.
Its more fun to respond to these threads than the ones that say, "I have $2000, help be build a computer". That's easy, just buy all expensive fast stuff. It's when you have to work on getting the absolute best bang for your buck that is the most fun.
Yeah the P4 is a bit dated. I usually upgrade my PC once a year in some way. I sell the old parts to get money for new ones. That way its this whole circle where I get rid of it while it is still of value to someone. Like I'll sell my video card for $100 to get a $250 but only need to fork over $150.