To get rid of the stutter -
Graphics > General > Ubershaders > Asynchronous (Ubershaders)
To diagnose the crashes -
Post the MD5 hashes of the games that crash (Right click on the game list entry > Properties > Info > Calculate MD5)
Disable cheats if you have any enabled, this is known to cause stability and performance issues for now.
You can try disabling dual core mode in config, but with your specs that might make some games run at less than full speed.
Graphics > General > Ubershaders > Asynchronous (Ubershaders)
To diagnose the crashes -
Post the MD5 hashes of the games that crash (Right click on the game list entry > Properties > Info > Calculate MD5)
Disable cheats if you have any enabled, this is known to cause stability and performance issues for now.
You can try disabling dual core mode in config, but with your specs that might make some games run at less than full speed.