I have 5 28xx with default memory 256mb. Original memory stick for 512mb costs around 3500USD. The same stick from PC DDR1, PC333, 512mb - only 20USD. (Save is 3500*5-20*5=17400USD)
I have installed the sticks, routers loaded well, memory was defined well but with warning that new DIMM is without ECC. So in "show version" i get:
DRAM configuration is 64 bits wide with parity disabled.
How important is that? Did anybody met any problem with this thing? I am about to set the routers to server the network and wondering a bit.
Here is the URL for the Installing and Upgrading Internal Modules in Cisco 2800 Series follow the guide it may help you
I have done some research in to it, and the reason why we are getting the message "DRAM configuration is 64 bits wide with parity disabled" , is because the installed DRAM does NOTsupport parity. If you install parity supporting DRAM on a router it enables parity and then checks for parity errors.
You can't enable parity in a system that doesn't have the correct type
of DRAM installed.
you may find more information about parity errors from the link below:
Hope this helps,