Buddy, i know of only 1 board that supports both DDR2 and DDR3.
Its the asus P5KC. U can use only 1 type of memory at once. But i dont think it has onboard video. It costs abt 9K in bangalore.
It does not have a PCI-e slot.
I would suggest the following:
Get this board:
Gigabyte GA-EG31MF-S2 Motherboard - GA-EG31MF-S2 by: Gigabyte -
and this card:
Point Of View NVIDIA GeForce 8400GS 512MB R-VGA150853 Graphics Card -
Total cost: 6K approx.
Reason:
I dont see u buying DDR3 memory any time soon.
This board has all the basics u need. Should be enough. Do u use/need more than 4GB RAM ??
For the GFX card, u do NOT need a PCI-e 2.0 interface as the version 1 will not bottleneck ur card. An 8 series card will provide u with HD acceleration too. So if u wanna watch blu ray movies, it will help. On this card, u should be able to play NFS MW, carbon,COD1,COD2,GTA:SA,coubter strike:Source ... at High or Medium high settings. U will NOT be able to play games like crysis, GTA 4, etc at good settings.
Tell me if u need more than 4GB RAM, i will try to get u a better option.