It's really quite hard to check what the i3 2100 can do, since it's release date is yet to come. I am planning to buy this once I get my hands on a P67 board. Can it be true that the intel i3 2100 3.10GHz (3mb cache) dual core can beat the Phenom II x4 3.5GHz (6mb cache) quad core when it comes to gaming? I've been trying to double check this on other websites but could not find any other.
most games today still utilize only two cores and the intel cores are much faster then the AMD cores
Well ... there is this, of course. But as always, it's the video card.
(Not starting a flame war) The reasons are numerous. Hard to believe but the Deneb silicon is now 2 years old. Memory through-put is roughly twice that of the Deneb at stock. SSE4 is finally working and you have AVX on top of that. I believe the 2100 is a dual-core plus 2 hyper-threads, too, so the differences are not so bright as the OP represents.
The issues the 2100 face are the CPU is completely clock-locked and the processor is limited to 16 PCIe lanes on the die. And because of the chipset snafu, by the time the 2100 gets back on the market it's price point will be occupied by the Phenom 955BE (if it's not EOL by then). Also, by then you have the Llano desktop APU most likely searching for a price point in this range.
(Now entering flame mode with poking stick) I notice where Chipzilla now IDs P67 as the Formerly Cougar Point chipset. Maybe they should have gone with Prince instead of Will-I-Am ??