This is one of bizzare DRAM modules I've ever seen. It is 256 MB ECC Registered memory from Compaq Proliant sever from 1997. They just couldn't fit all that chips on standard sized PCB so they extended it little bit. 😏
And it arrived today! I already checked my solar battery, all cells have internal resistance equal or bellow 0.25 mΩ which is exactly by the specs. I was worried that one of the cell could be bad which wasn't.