You can change voltage, supplied on memory module, in a section of BIOS settings of voltages and frequencies that may be called “Frequency/Voltage Control” (“CPU Frequency Control” or “Hardware Monitor Setup”). In older versions of BIOS you can find these parameters in a section “BIOS Futures Setup”. If it is possible to change the voltage, select the parameter “DDR Voltage” (“Vsdram” or “Vmem”) in a specified section and change the current value. This parameter always has got the value “Auto” by default which is appropriate to 2,5 V, 3,3V or 5V.
Each memory type has got its own value of supplied voltage: SIMM-modules – 5V, DIMM- and some DDR-modules – 3,3V, DDR-modules – 2,5V. Follow the main rule while changing the voltage: 10%-fluctuations of voltage are set out by the producer when producing the device and are treated as the conditions of its stability; 15% – critical change; 20% – your module may “burn”. This rule applies only to branded modules – all “fake” modules may both “burn” when increasing the voltage up to 5% and pass all changes up to 20-25%.
In addition to changes in voltage parameters, to stabilize memory operation you can try to use several settings enabling to speed up the interaction with memory.