Memory speed exceeds what the processor can handle.
Memory speed exceeds what the processor can handle.
Hello! Your 5 1600 doesn’t start up properly when using RAM speeds above 2666, even though there’s some data suggesting otherwise. It seems the issue isn’t just about slowing down the fast memory.
2666 is the main stable speed for 1st and 2nd gen Ryzen processors on any DRAM chips, while higher speeds become feasible with well-binned DRAM. Tell me your exact memory model and share a screenshot of an SPD reading from tools like Thaiphoon Burner or Passmark Rammon.
Essentially, anything quicker than my Patriot 2666 causes a boot loop. I've tested several functional Corsair 3000 and higher models, along with the XPG 3200. The motherboard is an ASRock Fatal1ty B450 Gaming K4.
Avoid using the stick's XMP profile or letting the board auto-set configurations. This will cause the sticks to operate at speeds the chip can't manage, especially if the RAM speed defaults are higher than the CPU's capabilities. You need to adjust the RAM manually to stay within its limits—set a RAM divider to 2666 or lower and test functionality. Your priority is getting it working first; adjustments can be made later.
Most Ryzen 1000 and 2000 desktops I've built run on DDR4 3200 or 3000. Although it's not always common, these processors usually handle lower speeds without issues, the slowest I needed was 2866. With these builds, can you reach BIOS even with a single memory stick?
They function properly, I tested them on different CPUs. At 5 1600 it loops but doesn’t reach BIOS. With a Patriot 2666 everything works fine.
The board clearly indicates it’s preparing the sticks at their standard pace, since the chip’s IMC can’t manage the higher speed. To run the faster or binned kits, you’ll need to manually adjust the RAM divider down to 2666 or less. I own a Ryzen 3 1200 and have successfully done this for my upgraded kits, but it functions correctly when done.