2nd ram slot does not work

[chanchalchatt]

My mb model is MSI PM8M-V.It has 2 ram slot and i have a 256mb of ddr-1 ram which is in the 1st slot.I want to buy a anather ram of 512 mb ddr-1,so i change my ram 1st ram position into the 2nd slot ,then i start my computer but it does not start. Please help me
Advanced thanks

[dhanusaud]

me have the same problem with my office system, but removing one slot either 256 or 512 works fine. 256+256 works but 256+512 doesn't work, dunno wht the exact problem is

tried a lot by changing slot vice-versa, clean the connection circuits but at last failed, now using 512mb.

[gulgulumaal]

Originally Posted by dhanusaud

me have the same problem with my office system, but removing one slot either 256 or 512 works fine. 256+256 works but 256+512 doesn't work, dunno wht the exact problem is

tried a lot by changing slot vice-versa, clean the connection circuits but at last failed, now using 512mb.

In your case I think ur mobo has a max limit of 512MB. Older mobos had limits like this. Check ur mobo specs.