New
#11
It would help to know what kind of memory you have (as well as system specs). If you're running performance memory for example, memtest will error if the memory is running below specs.
Example - Say you have Corsair's Dominator modules which runs at 1600MHz at 1.65 volts, well most (almost all) motherboards will only set the memory at a base setting of 1066MHz @1.5 volts - well if you memtest those modules at that setting memtest is going to error!
Not saying you don't have problems with the memory but to rule that issue out, we need to know what kind of memory you're using, along with your system specs.
My two cents.