I recently installed 8 gb of ram (2x4gb) in my 2011 iMac running Mountain Lion. I ran Memtest in single user mode as recommended on many sites. I am a little confused by the following results: Solid bits: setting 45 of 64firewire (OHCI) Lucent ID 5901 built-in: 52 bus resets in last 3 minutes Ok I got the same kind of results but with different numbers in block sequential, checkerboard, bit spread and bit flip. There is nothing plugged into my FireWire port, so I was wondering if this a RAM issue? It ends with OK so I don't know if it is a problem or just giving me information.