I'm new in this forum and hoping to find answers from the experts here. I'm gonna build a new system with the aforementioned components, questions:
1. Will DH61WW run at 1600MHz memory bus speed if I get the new 22nm CPU and DDR-3 1600 mem modules? (Suppose I pick an Ivy Bridge CPU that runs native at 1600MHz)
2. Intel is not gonna like this one but I'm gonna ask it anyway; there's space for an additional PCIe slot on the motherboard but the connector is missing. If I get a x1 connector and solder it to the empty slot in the motherboard will it work?
3. Will LSI 9211-8i, which is a x8 SAS/ SATA RAID card work in the x16 slot meant for graphic card?
The slot missing on the motherboard is not intended to be used and some parts ( additional from the port) are missing that are required to make the slot functional. Furthermore it will be very difficult for you to solder the motherboard without damaging other parts on the motherboard.
And for your last question, the PCI Express* slot is intended for graphics cards, but it is not limited to them. Intel(R) does not validate the usage of controller card on desktop motherboards, but we know that some will work. I recommend you to contact the manufacturer of the card and check if they have a tested motherboard list.