AMD slow memory training

[CLXIV]

Did the Zen 4 slow memory training ever get fixed? Is Zen 5 improved in this regard?

 

[R-T-B]

Zen 4/5 utilize the same IMC. Both are plenty fast now as long as only 2 sticks are used, IMO. 4 sticks remains iffy.

 

[CLXIV]

Zen 4/5 utilize the same IMC. Both are plenty fast now as long as only 2 sticks are used, IMO. 4 sticks remains iffy.

So how long are we talking to POST approx? Less than 10 seconds?

 

[Toothless]

You can do the memory context restore thing and get the faster boots. It turns off memory training on every boot.

 

[R-T-B]

So how long are we talking to POST approx? Less than 10 seconds?

Maybe. 5-20 seconds in my experience depending on how hard you push the memory. Oh and memory context restore works wonders if you do not need PowerDown disable. That is near instant.

 

[_roman_]

So how long are we talking to POST approx? Less than 10 seconds?

I had to set a delay in UEFI because my ASUS Pa278QV monitor does not show the picture as fast as the mainboard boots.
I think i reduced it from 10 second boot delay to something around 6 seconds. When I use less seconds it gets a pain to enter uefi or the boot selection menu.

With a single switch my power supply unit, my speakers and my monitor are powered. This is the signal for the mainbaord to boot it. I have to be very fast to enter "f8" the boot selection menu, else my efi stub kernel is already loaded.

The boot times are fixed for around ~1 year already for my mainboard.



CPU ryzen 7600x
mainboard asus prime x670-p


bank:1
description: DIMM Synchronous Unbuffered (Unregistered) 4824 MHz (0.2 ns)
product: KF556C36-32
vendor: Kingston
slot: DIMM 1
size: 32GiB



*-bank:3
description: DIMM Synchronous Unbuffered (Unregistered) 4824 MHz (0.2 ns)
product: KF556C36-32
vendor: Kingston
slot: DIMM 1
size: 32GiB


efi stub boots much faster as windows 11 pro on the same Kingston KC3000 2TB nvme

A few months my mainboard was quiet and did not had cold or warm boot issues. Recently I have to sometimes use several times the reset button to unstuck the asus uefi.

It does not matter much as a MSI mainboard is being delivered to my home.

I think the boot times are around ~3 seconds when you really set proper uefi values and have the latest uefi firmware for your mainboard. I have most of the values hardcoded and some other options set. I avoid using AUTO in uefi.

 

[CLXIV]

Thanks guys!

 

[freeagent]

From button push to login screen is 21.14 seconds

 

[R-T-B]

From button push to login screen is 21.14 seconds

Yeah I finally got sick of the 15 minute posts for 128GBs, nice as it was. My two stick setup for 64GB now is in that ballpark.

 

[freeagent]

Yeah I finally got sick of the 15 minute posts for 128GBs, nice as it was. My two stick setup for 64GB now is in that ballpark.

15 minutes would damage me emotionally.

 

[Outback Bronze]

Yeah I finally got sick of the 15 minute posts for 128GBs

Holy shit...

15 minutes would damage me emotionally.

I'd be able to have my 3 expresso's before boot up : )

Start the pc, go pack the coffee machine x3 then, I'm ready to rock n roll.

 

[freeagent]

I'd be able to have my 3 expresso's before boot up : )

I would explode lol

My heart is palpitating just thinking of it

 

[ir_cow]

Yeah I finally got sick of the 15 minute posts for 128GBs, nice as it was. My two stick setup for 64GB now is in that ballpark.

Reminds me of 90s computers. Yeah you could see the desktop, but if you tried to open anything it would take even longer. So 10 minutes inside windows before opening any programs and another 5 to start the dial up

 

[iSpeakVeryWell]

Oh and memory context restore works wonders if you do not need PowerDown disable.

This has been fixed. MCR work perfectly fine with PowerDown disabled.

 

[oxrufiioxo]

I would explode lol

My heart is palpitating just thinking of it

I always see this and I'm like is it really that bad to turn on your PC in the morning go take a piss get some coffee and it be ready for the day. The people that worry about this are the same people raging at stoplights when you don't go 1 second after it turns green I would imagine.....

 

[R-T-B]

This has been fixed. MCR work perfectly fine with PowerDown disabled.

When? It hasn't worked at least as of last month when I last tested on two seperate boards (Profile one plus an Aorus Elite x670), and that was with newest AGESA at the time.

AMD claimed they were going to fix it nearly 6 months ago but gave up, is what I was told at the time.

Frankly, unless I see citations it was actually fixed somewhere I'm not going to try it again.

 

[iSpeakVeryWell]

Power Down as been disabled by default since at least January/February, maybe even before.

My 9800X3D with OC'ed memory is runing with Power Down disabled and with Memory Context Restored enabled since January and it's rock solid.

 

[CLXIV]

Thanks guys. Could somebody catch me up on Power Down? From a quick Googling it sounds like a power-saving feature for RAM but it's sounding like there's some interaction with the Memory Context Restore setting? I grabbed a PDF manual for a randomly-selected X870 board and found no mention of a Power Down setting.

 

[Bill_Bright]

Yeah I finally got sick of the 15 minute posts for 128GBs

Ouch! Even my old, bogged down XP Pro system was quicker than that.

To me this learning process should essentially be "one and done" - unless there is some significant HW change, a major OS update, or the user manually initiates a new learning process. I think they need to rethink the process.

To me, I feel the learning process should take place over several computing sessions (even 4 to 5 days) to see (1) how my system resources are utilized and (2) what programs I regularly use, day-to-day. Then the process tweaks the BIOS and the OS to utilize the resources for optimal performance for me. At least that make more sense, to me.

 

[R-T-B]

Thanks guys. Could somebody catch me up on Power Down? From a quick Googling it sounds like a power-saving feature for RAM but it's sounding like there's some interaction with the Memory Context Restore setting? I grabbed a PDF manual for a randomly-selected X870 board and found no mention of a Power Down setting.

Yeah its a power saving measure that ads a tad bit of latency to ram because of switching from an idle state. Power users like to turn it off but doing so breaks MCR... or at least did on some boards, see below.

Power Down as been disabled by default since at least January/February, maybe even before.

My 9800X3D with OC'ed memory is runing with Power Down disabled and with Memory Context Restored enabled since January and it's rock solid.

What board if I may ask? You have me curious if its just a "some vendors" issue now.

 

[freeagent]

To me this learning process should essentially be "one and done" - unless there is some significant HW change, a major OS update, or the user manually initiates a new learning process. I think they need to rethink the process.

For me, once my settings have trained after I made a change in the bios, it is business as usual indefinitely.. if the system has to train every time you power your system up from off, then it is unstable imo..

 

[R-T-B]

For me, once my settings have trained after I made a change in the bios, it is business as usual indefinitely.. if the system has to train every time you power your system up from off, then it is unstable imo..

Or you just have MCR off. Used to be you kinda had to do that for best latency but its sounding like that is fixed, despite my earlier claims.

 

[freeagent]

Or you just have MCR off. Used to be you kinda had to do that for best latency but its sounding like that is fixed, despite my earlier claims.

What is that? It is probably at stock since I have not had much luck with mem OC on AM5

 

[Event Horizon]

Thanks guys. Could somebody catch me up on Power Down? From a quick Googling it sounds like a power-saving feature for RAM but it's sounding like there's some interaction with the Memory Context Restore setting? I grabbed a PDF manual for a randomly-selected X870 board and found no mention of a Power Down setting.

On my MSI B650 board, enabling both Power Down and Memory Context Restore has been rock solid stable and I boot in 15 seconds.

 

[R-T-B]

What is that? It is probably at stock since I have not had much luck with mem OC on AM5

Memory Context Restore. It's the function that makes it remember memory training across any reboots / powerdowns. Very handy.

On my MSI B650 board, enabling both Power Down and Memory Context Restore has been rock solid stable and I boot in 15 seconds.

Disabling powerdown was the issue.