My bad, so for the first question yes it would be fine. This cpu is lga775 socket and so is the motherboard. Second question if you use a separate gpu yes, if you have no gpu then no as this mb has no integrated gpu.
Third question depends on what type of psu you have, if it does not have 8 pin straight up or 4+4 type then again no.
I looked around and found 2 more alternatives although they only support up to 8gb of ram and only up to 1333mhz compared to my first suggestion's 16 gb up to 1600mhz. They both have a 4pin power connector and they do have integrated gpu so overall they're worse but more alike to ur old h-ig41-uATX:
Asus P5G41T-M/CSM
ASRock G41M-S3