Member Avatar for duliduli556

hey guys iv got 4gb of ramm in my computer and when i switch it off completely i have to go into the bios and enable memory remaping (i think thats what its called)
if i just switch oiff this doesnt happen, but if i turn it off at the power socket then i have to there anyway to stop this??

also the time and date aslways reset too

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Brief expert summary referencing the thread: and are on the right track — the combination of "memory remapping" needing to be re-enabled and the clock resetting points to BIOS/CMOS settings not being retained. Quick context: "memory remapping" (also seen as Memory Hole Remapping, Memory Remap Feature, or Above‑4G Decoding) only helps the OS see RAM above the address ranges reserved for PCI devices and matters most when a 64‑bit OS and chipset are used. Time/date loss plus option reversion after removing mains usually means CMOS retention failure, but there are other possible causes.

Troubleshooting steps (do these in order):

  1. Configure the BIOS (set time and memory remapping), use Save & Exit, then perform a normal reboot. If settings survive a soft reboot but not a full power‑cut, that isolates the problem to CMOS/standby power retention.
  2. Unplug AC for several minutes and check again. If settings are lost only after AC removal, it confirms retention failure. A simple voltage check of the coin‑cell or the 5VSB rail will help diagnose.
  3. If settings are lost even after soft reboots, consider a firmware/BIOS corruption: find the exact motherboard model and apply the vendor BIOS update following their instructions (backup profiles first).
  4. Rule out RAM/chipset issues: try one DIMM at a time in the recommended slot and verify the OS is 64‑bit if the goal is to address the full 4GB+.

Final notes and cautions: CMOS retention problems are commonly resolved by servicing the backup battery or the standby power circuit; persistent failures can indicate motherboard hardware faults (bulging caps, VRM problems) as warned. Take electrostatic precautions, read the motherboard manual before flashing firmware, and consider professional service if unsure.

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Member Avatar for Rik_

That means that your bios batery is flat and needs to be replaced. You didn't say what computer you have so assuming it's a PC rather than a laptop, you will need to go and buy a CR2032 battery. They are widely available in many shops and generally cost about £2. You then need to open up your PC and replace the old battery with a new one while it is switched off. If the battery is sitting flat against the motherboard, you will see a small metal clip that holds the battery at its edge, it can be pushed out of the way with a small screwdriver to allow removal of the battery. If the battery is sitting at 90 degrees to the motherboard then there should be a metal strip along the batteries edge that just needs to be gently pushed out of the way to release the battery.

Member Avatar for PcTestCard.com

Hope your PC problem is due to the Bios battery issue.

I have seen the other mainboard hardware error causing the problem.

Hope this helps!
Bill
Tech Manager

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