Windows won't start when XMP is activated.
Windows won't start when XMP is activated.
I constructed a new PC and observed that the RAM speed was only 4800MHz. The RAM I own supports up to 6000GHz, so I accessed BIOS and turned on XMP to achieve the advertised rates. I saved the configuration and left BIOS after enabling XMP. When I restarted the PC, power would cut off immediately. Each time I tried to turn it back on, the issue repeated. It wouldn’t remain powered long enough to access BIOS and disable XMP. Eventually, I had to remove the CMOS battery to reset the BIOS settings to defaults, and everything functioned correctly without XMP active. I attempted to enable XMP again but faced the same problem. My RAM model is listed as compatible with the motherboard on Gigabyte’s site. I also noted that my RAM sticks are installed in slots A2 and B2, as specified in the motherboard manual. Could anyone explain why the PC shuts down instantly upon powering up? My specifications are: CPU i7-14700K, Motherboard Gigabyte Z790 Gaming X, RAM G.Skill Ripjaws S5 model F5-6000J3040F16GX2-RS5K.
Occasionally the specified rates fail, you might adjust them by slightly changing the DRAM voltage, one or two clicks. If that doesn’t help, switch to another XMP profile, opting for a lower speed initially to test if it can manage a faster rate like 4800.
I'll test those later when I have time. When I turned on XMP, the only profile listed was "Profile 1". If I adjust the settings in BIOS manually, I see options like the one shown below, and it also includes choices for 16GB or 32GB. Should I pick 16GB or 32GB? My RAM is two 16GB modules.
Adjust only the RAM clock speed and the four main timing values tCAS, tRCD, tRP, tRAS to the ones provided in your RAM's specs, keeping everything else set to "Auto". For example, use 6000 MHz with timings 30-40-40-96. Then run a stability test like memtest86 and check performance. If it doesn't work, you'll need to tweak voltages, indicating unstable settings—either timing is too tight or voltage too low. Edited December 6, 2023 by noname8365
I've attempted the XMP1 profile once more, but it only replicated what @noname8365 reported. The same problem persists. I notice a DDR5 XMP Booster feature where you can pick from available options. Would you like to explore that? If yes, which option should you choose? You have two 16GB drives; regardless of choice, could the system fail to boot and then experience stability problems later? Your machine shuts down within 10 seconds after powering on, with no display on monitors.
After opening the XMP profile, I reviewed the DDR5 Voltage Control settings. The screenshots I observed match what I expected. Should I make any changes?