Cisco – upgrade RAM on a Cisco ASA 5520

ciscocisco-asamemory

I understand the risks of using third party ram but paying for the Cisco branded memory modules and CF cards on an old ASA which is no longer covered but Smartnet is ludicrous.

There are plenty of third parties who claim they sell compatible RAM. Does anyone have any experience as to what memory the ASA 5520 or any of the 55×0 series is compatible with?

  • speed (PC-xxxx or DDR-xxxx)
  • type (regular, ECC, buffered..etc)
  • sizes: (512, 1Gb, 2Gb DIMMS)

Best Answer

Assuming it's a real 5520 and not a fake that's actually a converted 5510 (yep, a bunch of those were floating around - you'll know it by the fact it's only got a single RAM slot) you'll want PC3200 with CAS latency (CL) of 3 running at 400MT/s, unbuffered, ECC.

Not sure if the ASAs are also picky about the chip arrangement too, so if you want to play it super safe, make sure the RAM you buy has the memory spread across 8 chips.