I'm going from a socket 939 X2 3800+ to the Phenom II 940 and here's why I did it now instead of waiting.
1. Price. Right now the Phenom II 940 can be had for as little as $229. The AM3 versions will most likely cost more. Plus, DDR3 is more expensive than DDR2 and the AM3 motherboards will probably cost more as well. In regards to going with the Core i7 920, the upgrades I picked were $120 cheaper than what I specc'd with the Core i7 920 setup.
2. AM3 CPU compatibility. The AM2+ socket motherboard I got will support the AM3 processors, so I can wait for the AM3 processor to come down in price.
3. Releases. The highest speed CPU AMD will release, from what I've seen of their roadmap, this year, is a 3.1 GHz AM3 Phenom II, so I won't lose any big speed race.
Upgrading this way I can eventually use all the components I have now to upgrade another PC while being able to do incremental upgrades for myself. As for the performance difference between the Core i7 920 and the Phenom II 940, well, I'm coming from an X2 3800+ so either platform is a significant performance improvement. I also like to support the underdog when I can because competition helps keep the consumer prices down.
1. Price. Right now the Phenom II 940 can be had for as little as $229. The AM3 versions will most likely cost more. Plus, DDR3 is more expensive than DDR2 and the AM3 motherboards will probably cost more as well. In regards to going with the Core i7 920, the upgrades I picked were $120 cheaper than what I specc'd with the Core i7 920 setup.
2. AM3 CPU compatibility. The AM2+ socket motherboard I got will support the AM3 processors, so I can wait for the AM3 processor to come down in price.
3. Releases. The highest speed CPU AMD will release, from what I've seen of their roadmap, this year, is a 3.1 GHz AM3 Phenom II, so I won't lose any big speed race.
Upgrading this way I can eventually use all the components I have now to upgrade another PC while being able to do incremental upgrades for myself. As for the performance difference between the Core i7 920 and the Phenom II 940, well, I'm coming from an X2 3800+ so either platform is a significant performance improvement. I also like to support the underdog when I can because competition helps keep the consumer prices down.