My computer is rebooting itself and when starts over again I get a message: "dram timing is too tightly so reload timing, Press any key..... (or something like that)"
what should I do ?
Figure out the key used to enter the BIOS setup
After entering the BIOS (usually the delete key) there is typically a hot key to RESET TO FACTORY DEFAULTS (usually F6). Then save and quit (Usually F10).
If this doesn't fix it, your motherboard may be providing your memory too low of a voltage. If you installed memory yourself, this could be the reason for the issue. If so, check the voltage, speed, and timings your memory is designed to run at. Then update your motherboard accordingly. You should download your motherboard's manual available at the manufacturer of your motherboard's website to do this.
If you are getting this warning without any hardware upgrades, your memory, memory controller, or other part may be dying.