I moved my PC components into a different case, and afterward my Corsair Vengeance LPX DDR4-3600 32 GB kit (CMK32GX4M2D3600C18) stopped running at its rated speed. It had previously worked at 3600 MHz, but now the system falls back to 2133 MHz. Enabling XMP causes the computer to restart and shut down instead of booting. The RAM is installed in slots 2 and 4, and I'm using an Intel Core i7-10700 with an MSI Z490-A Pro running the latest BIOS. The crashes started even before the BIOS update. What should I check to get the memory running at 3600 MHz again?
1 Answer
Since the modules are already in the recommended slots, clear the CMOS completely and then boot into the BIOS with default settings. After that, load the XMP profile for 3600 MHz and save it. Moving the system can sometimes leave a setting in an unstable state, and clearing the CMOS is more thorough than simply loading BIOS defaults. Also reseat both sticks and check that the motherboard isn’t being flexed or shorted by an extra case standoff. If XMP still fails, verify the memory voltage and timings against the kit’s specifications, then test each stick separately. The BIOS update is less likely to be the cause, since memory support lists generally expand rather than lose existing kits.
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