Core i5 noob questions

These questions refer to the Core i5 / Lynnfield:

1) Does it use a different socket than the i7? Will today's mobos be able to support both the i7 and i5?
2) What is meant by "integrated dual-channel DDR3 memory controller"?
3) And "integrated PCI-Express graphics controller"? Does this mean it doesn't need a dedicated graphics card or a mobo's integrated graphics?
4) Will all i5's be slower than the entry level i7?

1) Yes. No.
2 & 3, maybe 4 too) http://www.anandtech.com/cpuchipse [...] i=3570&p=1

1) unfortunately the i5 will use a different socket it will use the 1156 instead of the 1336 that the i7 uses

2) It simply means that the memory control is on the cpu die instead of the motherboard thus reducing down time between ram to cpu and mono communication it also reduces power usage by a little and overall aides performance

3) No it simply means that the graphics controller just like the memory controller is on the die insted of the motherboard,they are currently working on integrating gpu and cpu on one die but that is been done by amd (bulldozer and fusion technology)

5) the 2.8 version of lynnfield will outperform the i7 920 and will feature hyperthreading,turbo mode and DMI,the 920 is in fact gradually going to be phased out as the i5 is released

So with all that being said, Would it better to get an i7 920 Core out now while they are still available, or wait and get an i5 when they hit the market?

Or better yet, neither and wait to see what the 6 core cpu's will offer?

AJ

About what xyzionz said on the concept of multiple graphics card. One must remember the purpose for such technology e.g. SLi and CrossFire is to achieve higher performance not reached by the best single-GPU card available on market at the time. For $/performance (value) reasons it is unwise to use the above solutions as a form of upgrade i.e. adding another card when a better single GPU card is available on market. It is a mistake that is widely spread, fueled by marketing.

So choose carefully if you want i7 or i5. Running SLi or Crossfire with multiple cards of the latest generation means e.g. the best single-GPU card you buy can not run 2560x1600 max. eye candy at acceptable FPS. As far as the bandwidth of PCIe 2.0 16x goes, splitting into 8x it still has enough bandwidth to power the next gen. e.g. RV870 and G300 no problem if the card contains only one GPU. So 2 GPUs maximum.
For 3 or more of the latest(and next) generation GPU, only then will you need more than 16 PCIe 2.0 lanes offered by LGA1156.

It's not old, it's "new and improved".
And it is the requirement (the need) that matters not simply how old the technology is.