https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399
--- Comment #72 from SF <shitma...@hotmail.com> ---
Dear ,
Your service request : SR #{ticketno:[]} has been reviewed and updated.
Response and Service Request History:
Thank you for the email and feedback.
Higher memory frequencies on Ryzen can require a higher CPU voltage to ensure
full stability, so this would be expected once you start overclocking the
memory above 2667Mhz default values.
If your system requires these settings to be stable when using speeds of
2667Mhz or lower, i recommend sharing your experiences with the Motherboard
manufacturer, as you could have a faulty Motherboard or there could be a bug in
the Motherboard bios that would need to be addressed.
We have not received any similar reports of the issues you have described,
however we will stay vigilant to see if there are more reports of similar
issues from other customers.
With regards to memory, memory frequency up to 4000Mhz has been unlocked so
that Motherboard manufacturers may test and validate higher speed memory
configurations on their Motherboards. Furthermore, it allows customers who like
to overclock and tune their systems the possibility to extract extra
performance by running their memory at a higher frequency than was previously
possible.
Unfortunately overclocking memory can be extremely complicated and many
different factors are involved and so there is no guarantee that you will be
able to run your memory frequency any higher than the default (2667Mhz or
lower) supported values.
Due to the above, Motherboard vendors test various memory types and
configurations and certify them on a Qualified Vendor List (QVL) for each
Motherboard they manufacturer. I checked your Motherboard and found that
Gigabyte have not validated any memory to run at speeds above 3200Mhz using two
or more DIMMS.
As per the QVL, the memory you are using has not been certified to run at
3600Mhz/3466Mhz speed with a Ryzen processor. If you are unhappy with this, i
suggest contacting the Motherboard manufacturer. AMD does not guarantee memory
will run at any higher than 2667Mhz.
You can download the QVL for your Motherboard at the following link >
https://www.asus.com/uk/Motherboards/PRIME-B350-PLUS/HelpDesk_QVL/
Please refer to our gaming blog where this limitation regarding memory is
called out specifically.
For speed grades greater than DDR4-2667, please refer to a motherboard vendor’s
memory QVL list. Each motherboard vendor tests specific speeds, modules, and
capacities for their motherboards, and can help you find a memory pairing that
works well. It is important you stick to this list for the best and most
reliable results.
DDR4 Speed (MT/s)
Memory Ranks DIMM Quantities
2667 Single 2
2400 Dual 2
2133 Single 4
1866 Dual 4
https://community.amd.com/community/gaming/blog/2017/03/14/tips-for-building-a-better-amd-ryzen-system
Thank you for contacting AMD.
Please be advised that this service request will be permanently closed if you
do not reply within 10 days. If more time is needed to respond to my e-mail
above, please let me know and I will ensure that this service request remains
open for you.
In order to update this service request, please respond, leaving the service
request reference intact.
Best regards,
AMD Global Customer Care
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