This is usually caused by defective RAM, according to Apple it means that the RAM did not pass an integrity check. It's possible that one of the sticks of ram you bought was defective and is causing this error. You can troubleshoot further by testing each module of new RAM at a time, if it boots with just one of the sticks, then you know which one is bad. Other than that, PC3-10600 is the correct type of memory for this computer so you didn't buy the wrong part, once you figure out which one is bad, try exchanging it for a new one from wherever you bought it.
It is not uncommon to run into these types of issues related to memory when attempting RAM upgrades. I would suggest always replacing both sticks (if applicable) with the exact same type of RAM, and please make sure the RAM is of the specifications of your particular Mac, PC, etc. I would suggest first trying to clear the NVRAM if you have issues after RAM install. TO do that: shutdown your computer, turn it on and IMMEDIATELY after hearing the hard drive kick, press and hold at the same time, the COMMAND, Option, P, and R keys. Hold the keys until your computer restarts.
I have just faced this problem, too. I have a 4GB RAM and I wanted to install another 4GB RAM in the other socket. I have also tested both RAMs and they both work separately. Is it possible that, one of the sockets of my laptop mıght be broken, or is there anyone who could get rid of this problem?
