Need some help enabling XMP

[lerodemmy]

Am I going to run into any problems if I go from Disabled to Enabled?

 

Should I tweak anything myself, like the voltages or timings?  I’m afraid of messing something up, and would much prefer to use the XMP profile as is, if that’s a viable option.

The specs in my sig are current, if you need to know any of that stuff.

[RONOTHAN##]

6 minutes ago, lerodemmy said:

Am I going to run into any problems if I go from Disabled to Enabled?

 

Maybe? Only one way to find out. Enable it and check for stability. 

[Eigenvektor]

11 minutes ago, lerodemmy said:

Should I tweak anything myself, like the voltages or timings?  I’m afraid of messing something up, and would much prefer to use the XMP profile as is, if that’s a viable option.

That's generally the way to do it. Enable XMP and if it works, no need to mess with anything yourself, unless you want to.

[lerodemmy]

30 minutes ago, RONOTHAN## said:

Maybe? Only one way to find out. Enable it and check for stability. 

 

24 minutes ago, Eigenvektor said:

That's generally the way to do it. Enable XMP and if it works, no need to mess with anything yourself, unless you want to.

This was the result

 

[RONOTHAN##]

13 minutes ago, lerodemmy said:

 

This was the result

 

Ok, I guess that answers the stability question. You have two options:

1. Manually tune all the voltage settings to see if you can get it stable
2. Give up and just start dropping the memory frequency until it's stable. 

[lerodemmy]

5 hours ago, RONOTHAN## said:

Ok, I guess that answers the stability question. You have two options:

1. Manually tune all the voltage settings to see if you can get it stable
2. Give up and just start dropping the memory frequency until it's stable. 

I set it to 5600 MHz and it seems to be fine.

 

Any idea why 6600 would be unstable.  Is my motherboard possibly not good enough?

[RONOTHAN##]

12 minutes ago, lerodemmy said:

I set it to 5600 MHz and it seems to be fine.

You can probably get it a little higher than that, but not too much higher. 6000-6400 would be roughly where I'd expect it to top out depending on CPU quality. 

 

12 minutes ago, lerodemmy said:

Any idea why 6600 would be unstable.  Is my motherboard possibly not good enough?

Two main reasons, not quite sure on the breakdown between the two:

1. Intel's memory controller is incredibly inconsistent, where there's over 1000MT/s between the worst and best CPUs for max memory speed. Odds are you're not that lucky and might've gotten one towards the bottom half of that list. With 13th gen the range for dual rank memory was between 6000 and 7200 for speeds that would work if you put in some effort, so with 14th gen being a little better on average I'd expect the range to be between 6400 and 7600 for the speeds that would work in this config with some effort tuning voltages. 
2. 4 DIMM setups are really weird with DDR5, regardless of motherboard. They require quite a bit of BIOS optimization to work (given that 14th gen is so new and the memory controller is a bit different than the 13th gen one it could be that the optimizations for it aren't fully done) and are much more susceptible to weirdness in the memory controller or DIMM mounting. They're not as bad as some people say, but generally if you're not comfortable putting in a bit of effort fixing the config, they should be avoided. 

Another thing to note is that different CPUs require different IMC voltages to work at high speeds, and it's possible your chip does really bad at the motherboard/BIOS's default values but will do really well on manually tuned values. That's how my 13700K is, at stock values it can't run 7200MT/s yet with tuned voltages on the same board it will do 8000 and run benchmarks at 8400+. 

[lerodemmy]

13 hours ago, RONOTHAN## said:

You can probably get it a little higher than that, but not too much higher. 6000-6400 would be roughly where I'd expect it to top out depending on CPU quality. 

 

Two main reasons, not quite sure on the breakdown between the two:

1. Intel's memory controller is incredibly inconsistent, where there's over 1000MT/s between the worst and best CPUs for max memory speed. Odds are you're not that lucky and might've gotten one towards the bottom half of that list. With 13th gen the range for dual rank memory was between 6000 and 7200 for speeds that would work if you put in some effort, so with 14th gen being a little better on average I'd expect the range to be between 6400 and 7600 for the speeds that would work in this config with some effort tuning voltages. 
2. 4 DIMM setups are really weird with DDR5, regardless of motherboard. They require quite a bit of BIOS optimization to work (given that 14th gen is so new and the memory controller is a bit different than the 13th gen one it could be that the optimizations for it aren't fully done) and are much more susceptible to weirdness in the memory controller or DIMM mounting. They're not as bad as some people say, but generally if you're not comfortable putting in a bit of effort fixing the config, they should be avoided. 

Another thing to note is that different CPUs require different IMC voltages to work at high speeds, and it's possible your chip does really bad at the motherboard/BIOS's default values but will do really well on manually tuned values. That's how my 13700K is, at stock values it can't run 7200MT/s yet with tuned voltages on the same board it will do 8000 and run benchmarks at 8400+. 

Excellent.  Thank you for the detailed answer.