Hi Kadambari,
Yes, you could use cisco approved DRAM. Please see the Cisco part number for DRAM below,
MEM2811-256D
MEM2811-512D
I am not sure about the performance of the other vendor memory, but still i would suggest you to use the cisco product to aviod any deviation in the performance.
Refer:
Installing and Upgrading Internal Modules in Cisco 2800 Series Routers http://www.cisco.com/en/US/partner/docs/routers/access/2800/hardware/installation/guide/10_hw.html#wp1026137
Cisco 2800 Series Integrated Services Routers
http://www.cisco.com/en/US/partner/prod/collateral/routers/ps5854/prod_qas0900aecd80169bd6.html
Regards,
Aru
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Regards,
Aru
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