Ram Speed on Erica Motherboard

[tipyourbellman]

Hello,

I have a new HP Pavilion Desktop - TP01-0066  with the Erica AMD Promontory B550A motherboard. The motherboard specs indicate: "Supports PC4-25600 (DDR4-3200)" under the memory upgrade information. The current ram installed is 2666  and Iwas looking at some 3200. My question is what does "supports 3200" mean? I don't see an area to adjust ram speed in the bios, so will the motherboard automatically detect the new ram's max speed, or will the 3200 sticks just run at the factory 2666 speed? 

Thanks

[wb2001]

@tipyourbellman,

The RAM must be matching pairs.   If you were to install a single 3200 it would run at 2666 because of the other 2666. Crucial 16GB (2x8GB) pair of 3200's shown here.

Now can you do me a favor. Unplug power cord, and remove side cover. Your supposed to have an L64961-800 PSU. Look at the power cables at the PSU. Is there a PCIE power plug, either a 6 pin or 6+2 pin plug?

[tipyourbellman]

I am wondering if I get a matching pair of 3200 will the motherboard run it at 3200 automatically? I don't think the bios allows me to make updates to the ram timings.

[wb2001]

@tipyourbellman 

It will autosense the RAM.

How about my question?  I updated my spreadsheet based on your inquiry (new unit).

  But unless you help me with the cabling PCIE question, I will not know.

[tipyourbellman]

Thank you for the response. I ordered a 16gb kit of 3200. I will report back here confirming if it is detected and run at it's full speed by the HP motherboard.

To answer your question, it looks like I have PSU part number: L63964-004, and it does seem to have an unused 6+2 cord. 

[tipyourbellman]

So I installed the 3200 kit and the motherboard is not picking up the advertised speed. It is actually slower at ~2400 Is there a way to adjust this in the HP bios? I can't figure out how to adjust it through Ryzen Master either. Any correct advice would be appreciated. 

[Attikid]

Did you manage make it work ?

It seems that these motherboard are locked via BIOS and down-clock RAM speeds.

It's a very controversial topic as HP states these Motherboards support DDR4 pc-25600 RAM.

Did you checked the UEFI settings of your pc ?

[tipyourbellman · Accepted solution]

I was able to get them running 3200 cl16 (the pair was rated 3200 cl14) via ryzen master. Ryzen master must do something to the bios, because it runs those speeds now even after uninstalling it. The bios can't manually adjust any ram speed settings. I had to flash the bios several times to figure out 3200 cl16 was the best I could get. 

[Attikid]

I suppose cl14 is too fast for this motherboard and maybe there was some function down-clocking the frequency to balance It. 

So instead of buying another RAM module you raised the latency up to cl16  in Ryzen Master, right ?

I think Hp should be a little more precise when declaring RAM compatibility.

Thanks for the best support.

[tipyourbellman]

Yeah, it came with 1 8g stick 2600 cl20. I got a set 16g set rated 3200 cl14 and got it running 3200 cl16 with a lot of trial and error.