F5F Stay Refreshed Hardware Desktop Activating XMP in BIOS results in failure to boot, requiring a CMOS reset to restore functionality

Activating XMP in BIOS results in failure to boot, requiring a CMOS reset to restore functionality

Activating XMP in BIOS results in failure to boot, requiring a CMOS reset to restore functionality

M
MidgetOnRoids
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05-29-2020, 10:55 AM
#1
New specifications include 5600x MSI B550 A Pro MOBO OLOY with two 16 GB dual-rank RAM modules operating at 3600 MHz. The system functions well with older configurations, such as 3000 MHz RAM (2x8 GB) from a previous build. However, enabling the standard XMP profile in MSI BIOS causes the computer to freeze and restart only after a full CMOS reset. There appears to be a concern about dual-rank RAM compatibility, possibly related to the Ryzen series. Additionally, the MSI LED indicators illuminate for both DRAM and processor, then switch to VGA after a short delay, though the DRAM LED remains active even with functional RAM. It seems the issue might be with the MOBO module itself rather than the RAM.
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M
MidgetOnRoids
05-29-2020, 10:55 AM #1

New specifications include 5600x MSI B550 A Pro MOBO OLOY with two 16 GB dual-rank RAM modules operating at 3600 MHz. The system functions well with older configurations, such as 3000 MHz RAM (2x8 GB) from a previous build. However, enabling the standard XMP profile in MSI BIOS causes the computer to freeze and restart only after a full CMOS reset. There appears to be a concern about dual-rank RAM compatibility, possibly related to the Ryzen series. Additionally, the MSI LED indicators illuminate for both DRAM and processor, then switch to VGA after a short delay, though the DRAM LED remains active even with functional RAM. It seems the issue might be with the MOBO module itself rather than the RAM.

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GeorgePlaysFTW
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261
06-05-2020, 08:46 AM
#2
I notice similar discussions appearing more frequently. Please consider carefully that XMP/DOCP indicates the memory vendor, not necessarily the maker, since most companies don’t actually manufacture the chips themselves. They confirmed the memory can reach certain speeds under specific conditions. What matters most is that it’s capable, not guaranteed. This detail appears in any brand offering pre-packaged memory. Speeds above the standard 2133MHz depend on three factors: the processor’s memory controller, the motherboard, and the RAM itself. If any of these fall short, you won’t achieve the claimed rate. To maximize performance, verify your motherboard’s QVL for supported configurations. Also, using high-density RAM like 16GB sticks can strain both controller and board, especially when all slots are filled. Reviewing QVLs across multiple boards helps identify which speeds and capacities are truly supported. Even with a good controller, RAM and board limitations mean XMP only defines a few parameters; the rest must be managed automatically. Some boards misconfigure settings, leading to instability or failure. You may need to adjust BIOS settings manually—tighten timings and increase voltage if needed. For DDR4, values under 1.5V are acceptable for daily use with good airflow. However, always verify your chip’s tolerance to overvoltage (some exceed 1.35V). Using a DRAM calculator for Ryzen can help you find optimal settings. Tools like the one at https://www.techpowerup.com/download/ryz...alculator/ provide timing charts tailored to your chip. In the BIOS, skip configuring “Misc Items” and “CAN BUS Block”—unless you’re experienced. Fill the rest manually. Remember, RAM speed beyond 3000MHz rarely matters for gaming; focus more on memory rank and dual-rank usage.
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G
GeorgePlaysFTW
06-05-2020, 08:46 AM #2

I notice similar discussions appearing more frequently. Please consider carefully that XMP/DOCP indicates the memory vendor, not necessarily the maker, since most companies don’t actually manufacture the chips themselves. They confirmed the memory can reach certain speeds under specific conditions. What matters most is that it’s capable, not guaranteed. This detail appears in any brand offering pre-packaged memory. Speeds above the standard 2133MHz depend on three factors: the processor’s memory controller, the motherboard, and the RAM itself. If any of these fall short, you won’t achieve the claimed rate. To maximize performance, verify your motherboard’s QVL for supported configurations. Also, using high-density RAM like 16GB sticks can strain both controller and board, especially when all slots are filled. Reviewing QVLs across multiple boards helps identify which speeds and capacities are truly supported. Even with a good controller, RAM and board limitations mean XMP only defines a few parameters; the rest must be managed automatically. Some boards misconfigure settings, leading to instability or failure. You may need to adjust BIOS settings manually—tighten timings and increase voltage if needed. For DDR4, values under 1.5V are acceptable for daily use with good airflow. However, always verify your chip’s tolerance to overvoltage (some exceed 1.35V). Using a DRAM calculator for Ryzen can help you find optimal settings. Tools like the one at https://www.techpowerup.com/download/ryz...alculator/ provide timing charts tailored to your chip. In the BIOS, skip configuring “Misc Items” and “CAN BUS Block”—unless you’re experienced. Fill the rest manually. Remember, RAM speed beyond 3000MHz rarely matters for gaming; focus more on memory rank and dual-rank usage.

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