memory seems to be running slow.

[Jovin]

Hi All
Recently built a system consisting of
Gigabyte B550m DS3H motherboard, says on the box Ryzen 5xxx ready. I know some older versions of this motherboard needed a BIOS update to work.
AMD Ryzen 5 5600G
Corsair vengeance LPX DDR4 32GB 3600 CL18 Ryzen tuned kit.

Every thing seemed to be running ok with Windows 11 but I have noticed that the reported RAM speed is only 2666 both in BIOS and using the Gigabyte Easytune software. First thought was did I receive the correct memory as I didnt check when installing but checked the packet, which was sealed when received, and it is as ordered.
Everything is supposed to be compatible so I would have thought it would have automatically picked up RAM speed as 3600.
Tried adjusting up a little in the Easytune s/w but just a slight increase caused the system to be un-bootable. Cleared CMOS and fortunately it sprang back into life. My question is it appears I can up it in BIOS but which setting do I change, Multiplier or clock frequency?


Any help appreciated.
John

 

[Jovin]

Your bios should have
Xmp/expo/docp whichever name that board calls it
Enable that
It's normal to boot at a lower speed
That's jedec standard timings
Anything over that is technically overclocking the ram
But all ram manufacturers do this

Yes, it works! Thanks so much. Was trying to be conservative with settings and didnt want to overclock as such so left it all set to Auto. Nothing anywhere to suggest XMP needed to be enabled to get full potential of RAM but once done RAM is now showing as 3600

 

[Jovin]

Is that kit 4 by 8gig modules or 2 by 16gig?

2 x 16

 

[Jovin]

Thanks again for the great info. Been a while since I last built a PC so this is all new to me, I would have expected it to work at the marketed speed straight out of the box. Also checked the box again and there is nothing to say that any particular settings need to be implemented, all seems a bit like bad marketing to me. I did look on the Corsair website at this particular kit and it does say there "XMP 2.0 support. One setting is all it takes to automatically adjust to the fastest safe speed" but I dont feel that is particularly helpful if you dont know what XMP is.
Fine on the clear cmos/bios update bit, I assumed that would be the case.

 

[Jovin]

You're welcome
And yeah it's one of those things
Where they don't usually tell you about it
Not sure it even tells you
On the ram packaging

Cpuz free software is a useful tool
For future use
Got a memory section that tells you current ram speed
For ddr you double the speed shown
So yours would show 1800mhz
Doubled =3600mhz

It also has a spd section
That tells you all the speeds your ram is actually capable of
Usually lowest one in that section is what it defaults to
And highest are xmp/docp/expo profiles

Defaulting to lower speed is sort of a failsafe
Say your motherboard or cpu memory controller couldn't handle
3600mhz for some reason
Rather than not boot or bluescreen
It boots at 2666mhz by default then you can enable xmp/docp/expo
Which is all fine if the consumer actually knows about this

If you update bios or clear cmos
You will have to re-enable it

Thanks again for the great info. Been a while since I last built a PC so this is all new to me, I would have expected it to work at the marketed speed straight out of the box. Also checked the box again and there is nothing to say that any particular settings need to be implemented, all seems a bit like bad marketing to me. I did look on the Corsair website at this particular kit and it does say there "XMP 2.0 support. One setting is all it takes to automatically adjust to the fastest safe speed" but I dont feel that is particularly helpful if you dont know what XMP is.
Fine on the clear cmos/bios update bit, I assumed that would be the case.