Few days ago I encountered this problem in my clients server, IBM Server Xseries 226 does not detect RAM, the error beep signal 3-3-3. Here I tried a lot ways to fix the problem then finally I found the fix, Just stick with me. I find may people asking the same question on may websites.
Solved: IBM Server Xseries 226 does not detect RAM, The error signal 3-3-3
