Too fast RAM for CPU

[luki527]

Hello! My 5 1600 doesn't boot (boot loop) with memory faster than 2666. There is an information that 2666 but it shouldn't just lower speed of the fast memory? 

[SorryBella]

3 minutes ago, luki527 said:

Hello! My 5 1600 doesn't boot (boot loop) with memory faster than 2666. There is an information that 2666 but it shouldn't just lower speed of the fast memory? 

2666 is pretty much the only stable speed for 1st and 2nd gen Ryzen on any DRAM chips, but above that is possible with a decently binned DRAM chips. Whats your memory in specific, and do you have a screenshot of an SPD read from something like Thaiphoon Burner or Passmark Rammon?

[luki527]

3 minutes ago, SorryClaire said:

2666 is pretty much the only stable speed for 1st and 2nd gen Ryzen on any DRAM chips, but above that is possible with a decently binned DRAM chips. Whats your memory in specific, and do you have a screenshot of an SPD read from something like Thaiphoon Burner or Passmark Rammon?

I mean, when anything faster than my patriot 2666 it just boot loop. I tried few (working) corsair 3000 and above and also xpg 3200. Motherboard ASrock Fatal1ty B450 Gaming K4

[Beerzerker]

Don't use the stick's XMP profile or let the board set things up on "Auto", the board will have those sticks at a speed setting the chip can't handle, esp if the RAM set is rated for speeds by default beyond what the CPU can handle.

You will have to set RAM speed manually so it doesn't exceed the chip's own limitations - Manually set a RAM divider to get speeds down to 2666 or slower and see if it works.

The immediate goal is just to get it working, you can tweak things later.

[Fasauceome]

10 minutes ago, SorryClaire said:

2666 is pretty much the only stable speed for 1st and 2nd gen Ryzen on any DRAM chips, but above that is possible with a decently binned DRAM chips. Whats your memory in specific, and do you have a screenshot of an SPD read from something like Thaiphoon Burner or Passmark Rammon?

The vast majority of Ryzen 1000 and 2000 desktops I've completed use DDR4 3200 or 3000. Even though it's less of a given, these chips don't often struggle with modest speeds, the lowest I've had to knock down to for stable operation was 2866. 

 

6 minutes ago, luki527 said:

I mean, when anything faster than my patriot 2666 it just boot loop. I tried few (working) corsair 3000 and above and also xpg 3200. Motherboard ASrock Fatal1ty B450 Gaming K4

With these kits, are you not able to get to BIOS at all, even with one stick?

[luki527]

2 minutes ago, Fasauceome said:

The vast majority of Ryzen 1000 and 2000 desktops I've completed use DDR4 3200 or 3000. Even though it's less of a given, these chips don't often struggle with modest speeds, the lowest I've had to knock down to for stable operation was 2866. 

 

With these kits, are you not able to get to BIOS at all, even with one stick?

Nope

They work, I tried them with other CPU's. With 5 1600 it boot loop but never go to the bios. With one Patriot 2666 everything is alright

[Beerzerker]

15 minutes ago, luki527 said:

Nope

They work, I tried them with other CPU's. With 5 1600 it boot loop but never go to the bios. With one Patriot 2666 everything is alright

A clear indicator the board is setting up the sticks by their default speed, based on their speed rating being at a speed the chip's IMC can't handle.

To use the higher speed/binned kits you will have to set the RAM divider manually to 2666 or lower for them to work.
I have a Ryzen 3 1200 that I have to do that with for use with my higher binned kits but it works when I do that.

[luki527]

5 minutes ago, Beerzerker said:

A clear indicator the board is setting up the sticks by their default speed, based on their speed rating being at a speed the chip's IMC can't handle.

To use the higher speed/binned kits you will have to set the RAM divider manually to 2666 or lower for them to work.
I have a Ryzen 3 1200 that I have to do that with for use with my higher binned kits but it works when I do that.

Okay, thanks for answer!