<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Oct 25, 2005, at 4:42 PM, Dustin wrote:</DIV><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Now if I could only figure out why it can't boot with all four slots<SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">filled....</DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV>72 pin memory had a fairly strict configuration scheme, if i remember right. especially the dec alphas. different memory modules with the same part number and mfg model number might not work.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>if i remember right, if you have 4 banks and are using ECC they must all be ECC. i am not sure about fast page memory, but i think this is true also. all 4 would have to be fast page. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>for a while mfgs were making two different parity chips. one was true parity and the other was like an emulated parity, not a true parity. i forget the name for them, but if the board is set for true parity, then the emulated will probably not work.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>some motherboards required that simms be installed in certain banks according to size. ie, bank 0 and 1 can accept 32MB while bank 2 and 3 might be able to accept 16MB. best to find a motherboard manual online.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>also, on each simm there is a long number followed by a dash and the number 60 or 70. (sun had 50 also i think). this is the speed of the memory in nanoseconds (?). i would guess this could trip the memory to not work. if this is the case, put the higher speed (60ns) in the second bank. maybe it will default to 70ns.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>good luck</DIV><DIV>jeff<BR><BLOCKQUOTE type="cite"></BLOCKQUOTE></DIV><FONT class="Apple-style-span" color="#0000DD"><BR class="khtml-block-placeholder"></FONT></BODY></HTML>