Allowing A-XMP results in the PC failing to start
Allowing A-XMP results in the PC failing to start
Hey there,
I recently installed new RAM and followed the BIOS instructions to enable A-XMP for maximum performance. After saving the changes and exiting, the system still runs but nothing appears on the screen, as if it’s stuck in a loop. Here’s my setup: Corsair Vengeance LPX 64GB (4x16GB) DDR4 3200MHz C16 XMP 2.0, Pure Power 11 ATX 700W, AMD Ryzen 9 3900X, MSI MPG X570 Gaming Plus. It looks like everything should work at 3200MHz, but the monitor remains blank. Anyone have any suggestions on what might be causing this issue?
Cheers and happy holidays!
It's the combination of RAM and motherboard that matters. Ryzen doesn't favor 4x modules. They typically use A2 as the main slot with B2 for dual-channel at high speeds. A1/B1 slots are smaller and compressed, they avoid supporting over 2933MHz with a 3000 series CPU, which can disrupt Infinity Fabric. Depending on whether the RAM is single or dual-channel, you might achieve 2933MHz, but reaching 2666MHz is common. Most 4x sticks haven't reliably hit 3200MHz with a Ryzen and require manual adjustments to Infinity Fabric settings and timings. You can reach 3200MHz by using just two sticks.
Reset the motherboard and if available try another XMP profile (e.g. 2933MHz).
See if when selecting the profile the voltage goes from 1.2 to 1.35. If it doesn't then you might need to manually enter the voltage.
You could also enter the timings and voltage manually.
Which BIOS version does the motherboard has?
What's the model of that RAM kit?
Since XMP is OCing, is not guarantee to work every time on every motherboard...even more so with 4 RAM modules.
I have installed up to 3600MHz RAM on that motherboard model, but never 4 modules.
It's the combination of RAM and motherboard that matters. Ryzen doesn't favor 4x modules. They typically use A2 slots with B2 for dual-channel at high speeds. At full speeds, A1/B1 slots are smaller and don't support over 2933MHz with a 3000 series CPU, which can disrupt Infinity Fabric. Depending on whether the RAM is single or dual-channel, you might achieve 2933MHz or cap at 2666MHz. Very few 4x sticks have consistently reached 3200MHz with a Ryzen and remained stable. Usually, you need to manually adjust settings and explore Infinity Fabric configurations to get closer to the desired frequency. If you aim for 3200MHz, consider using two 32GB sticks in A2/B2 or settle for 2666MHz/2933MHz with four 16GB sticks.