Looks like your RAM's about to be shot! To save a few dollars when replacing your RAM, you can purchase a new one yourself and bring it to a repair group to have it put in.
also check the capacitors on the motherboard, if they are leaking or bulged outwards on top they may be bad and can cause errors. can be fixed relatively cheap.
Hardware:
Asus Sabertooth Z77
AMD Radeon™ HD 6770 Graphics
Intel Core i7 2600 Sandy Bridge
Corsair CMZ8GX3M2A1866C9 Vengeance (4x4Gb)
Gigabit PCI Express Network Adapter TG-3468