I found out there is a slight difference in how the DS12887A and DS12887A+ work from out of the box to put it in the old saying, pin 21 looks like it was originally there on my old RTC (DS12887A) and it defiantly was there on the new RTC I ordered online (DS12887A+), but because of pin 21 the time and Bios settings was never saved so I found out by removing pin 21 it worked, just like a bought one. Read this post for more info:

viewtopic.php?f=46&t=62916

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takie cos znalazlem jeszcze na vogons
czyli + to chyba nie tylko olow