Mother board upgrade for the Compaq DC7900 Small Form Factor

Fizzt

Prominent
Apr 28, 2017
1
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510
So I have a Compaq DC7900 Small Form Factor and I was wondering if I could maybe upgrade the mother board without upgrading the case and power supply. The current board only supports DDR2 and lga775 while I want to be able to use DDR3 and an i5 or i3. The only thing that I want to keep is the hard drive and my 750 Ti but I don't want to spend money to upgrade power supply and case but I will if I have too. Any Suggestions? Also, would this work?
http://www.ebay.com/itm/i3-SLBLR-8GB-RAM-ASUS-P7H55-M-PRO-Micro-ATX-LGA1156-DDR3-Intel-H55-Motherboard-/401313970730?hash=item5d702d3a2a:g:UNwAAOSwTM5Y4o2b
I normally don't order off ebay unless I can send back.

And adding 2 gbs of ram, a small CPU upgrade and adding a 750ti is all I did to the PC if that helps!