The computer had a RAM DDR3 2 GB 1600 MHz (1.65 V) - 2 pcs. Added DDR3 2 GB 1333 MHz ( 1.5 V ) - 2 pcs. Why doesn't it start?

Question

RAM

With the old pair, it works, with the new pair, it works. Jointly no.

Answer 1

1. Insert the old pair.
2. Force the BIOS to 1333 MHz.
3. Insert an additional new pair.
Everything.
Before each step, the PC must be turned off, of course.

Answer 2

1. Inserted an old pair.
2. I forced the frequency to 1333 MHz in the BIOS.
3. Inserted an additional new pair.
4. I set the voltage to 1.7 V. It does
not start.
I set the voltage to 1.7 V because the bar indicates a voltage of 1.65 V.