AM5 memory training length

[Knight47]

Hello. Does anyone know how long it takes on different memory size? Like 32GB, 48GB and 64GB? Does 64GB take twice as long compared to 32GB?

 

[_roman_]

After a CMOS reset and 4800MT/S for 2x KF556C36-32 is very, very fast.

Overclocking takes longer the first time after the settings were applied in the uefi for my ASUS Prime X670-P mainboard.

I think you should clarify your question? After a CMOS Reset? with already applied settings? new settings and the first "try bootup"? overclock settings which may not even run stable the box? Are you talking about the Dimm Size or the Kit Size?

I think OC always takes longer until the mainboard has figured out something. I also set the parameter for 10x tries, not 1x try. So it takes much longer. Past year uefi updates have increased the speed also.

--

A cmos reset. Loading the settings from USB. Save and reboot. Takes far less as in may 2023. I think around less than 30 seconds for 2x32GiB DRAM I have = 2x KF556C36-32

When ASUS is maybe not lazy and releases the agesa fix which MSI has already out in the open for days. I may remember this topic and I can give a feedback for my box.

 

[Bill_Bright]

Does anyone know how long it takes on different memory size? Like 32GB, 48GB and 64GB?

There are too many variables for anyone to tell how long it takes. These include the specific CPU and specific motherboard - and there are 100s (1000s?) of different possible combinations just for those two variables.

Does 64GB take twice as long compared to 32GB?

No. If there is any difference, you, as a mere human, would not notice.

Where there likely will be a small difference is in comparing 2 sticks vs 4 sticks vs 6 sticks and so on. But still, it would be pretty quick. Crucial says up to 15 minutes for a new or upgraded system. I've seen considerably faster than that, but also think 30 minutes is not uncommon for a brand new setup. Again, there are many variables at play here.

This guy says up to several hours and even days. I've never anything close to that. But he is right to say it takes patience.

In any case, it can require several reboots to settle into the best settings. So that can add time. But once optimized, it should add no more than a small handful of seconds to later reboots.

 

[freeagent]

On my system it takes about twice as long to train 4 sticks compared to 2.

 

[ShrimpBrime]

Hello. Does anyone know how long it takes on different memory size? Like 32GB, 48GB and 64GB? Does 64GB take twice as long compared to 32GB?

Most boards on auto train quickly, 30 to 60 seconds. This is only "early memory training" as default. The rest on auto may become active if secondary timings are altered (not auto) and extra training algorithms set to enabled.

 

[ir_cow]

More ranks = more time. Not sure if faster speed changes memory training.

 

[KatyaKassin]

On my Asrock X670E PG Lightning it takes almost 45 sec when i activate expo profile.

 

[Launcestonian]

I updated the bios on my Asus B650M Tuf gaming board with a 2x16GB kit (Hynix A) to 3222 version & latest AGESA release, after rebooting with defaults, I dialled in 5600MT/S with manual primary timings & left the subs on auto, took 30 seconds to reboot for further memory testing at the desktop. This may be one example but it can give you an idea.

 

[R-T-B]

On my system it takes about twice as long to train 4 sticks compared to 2.

On my system (which is dual rank 4 sticks to get 128GBs) training takes nearly 10 minutes.

Yeah, I avoid rebooting unless theres a good reason.

 

[Knight47]

I think you should clarify your question? After a CMOS Reset? with already applied settings? new settings and the first "try bootup"? overclock settings which may not even run stable the box? Are you talking about the Dimm Size or the Kit Size?

I think OC always takes longer until the mainboard has figured out something. I also set the parameter for 10x tries, not 1x try. So it takes much longer. Past year uefi updates have increased the speed also.

--

A cmos reset. Loading the settings from USB. Save and reboot. Takes far less as in may 2023. I think around less than 30 seconds for 2x32GiB DRAM I have = 2x KF556C36-32

When ASUS is maybe not lazy and releases the agesa fix which MSI has already out in the open for days. I may remember this topic and I can give a feedback for my box.

Fresh build, on first boot. Later with cold boot. On default 4800 and Expo 6000.

One of these kit's would be used.
KF560C30BBEK2-32
AX5U6000C3024G-DTLABRBK
KF560C36BBEK2-64

There are too many variables for anyone to tell how long it takes. These include the specific CPU and specific motherboard - and there are 100s (1000s?) of different possible combinations just for those two variables.

No. If there is any difference, you, as a mere human, would not notice.

In any case, it can require several reboots to settle into the best settings. So that can add time. But once optimized, it should add no more than a small handful of seconds to later reboots.

I do not plan to tune the ram, just Expo 5600 or 6000. Board is Asus X670 and 7800X3D.

I updated the bios on my Asus B650M Tuf gaming board with a 2x16GB kit (Hynix A) to 3222 version & latest AGESA release, after rebooting with defaults, I dialled in 5600MT/S with manual primary timings & left the subs on auto, took 30 seconds to reboot for further memory testing at the desktop. This may be one example but it can give you an idea.

Thanks

On my system (which is dual rank 4 sticks to get 128GBs) training takes nearly 10 minutes.

Yeah, I avoid rebooting unless theres a good reason.

Thanks. I do not plan to run 4 sticks. I asked because i'm debating if I should get 2x24GB single rank or 2x32GB dual rank. I heard that dual rank is harder to run at 6000MHz, maybe I need to dial down to 5600. So I was wondering if training takes like 5+ minutes on the 2x32 kit.

 

[R-T-B]

Dual rank is always tougher on the training / IMC than single rank. 2x single rank will be the gold standard for speed and training times.

 

[Knight47]

Dual rank is always tougher on the training / IMC than single rank. 2x single rank will be the gold standard for speed and training times.

Thanks, sadly Kingston has no 2x24GB kits. I'm stuck between G.Skill(people complain about bad cooling) and Adata(some say it's unreliable). Only the Kingston 64GB CL36 kits are on qvl.

 

[Zach_01]

Hello. Does anyone know how long it takes on different memory size? Like 32GB, 48GB and 64GB? Does 64GB take twice as long compared to 32GB?

Memory training time can be a lot different from board to board at least not to mention from RAM to RAM.

I've looked into my board's training setting in BIOS and could dare mess with anything. Too many things that I do not know how to configure them.
So everything is default there.
Can't remember how long it took the first time but now every time I change anything in BIOS, even if its totally unrelated to DRAM the board is training twice, about 50~55sec each. I can tell from the on-board post code display. So it takes about 100~110sec for training and another 15-20sec for the normal POST sequence and I'm in windows in less than 2.5min.
Notice, I have memory context restore enabled and my RAM is 2x32GB (dual rank)

When I was messing around with DRAM settings and I punch too low timings, the board was training more than usual. At least 4 or 5 times (x50~55sec) and eventually returned to JEDEC settings.

 

[ShrimpBrime]

for the normal POST sequence and I'm in windows in less than 2.5min.

Two and a half minutes!

My gosh dude. It shouldn't retrain every cold post. Something is not right, or it's not stable.

Doesnt memory Context Restore shorten post times on AMD? Could swear there's a long ass thread about it here some where.

 

[Zach_01]

Two and a half minutes!

My gosh dude. It shouldn't retrain every cold post. Something is not right, or it's not stable.

Doesnt memory Context Restore shorten post times on AMD? Could swear there's a long ass thread about it here some where.

Didnt say that.
When PC is off or when I reboot I'm in windows in 20sec.

Only when I change something in BIOS and save+exit, even if it is leds on/off then it is re-training with a total of <2.5min for seeing desktop.

 

[ir_cow]

Two and a half minutes!

My gosh dude. It shouldn't retrain every cold post. Something is not right, or it's not stable.

Doesnt memory Context Restore shorten post times on AMD? Could swear there's a long ass thread about it here some where.

If you cut the power, nothing is retained. I experience this ever time I review stuff because I am always swapping stuff around. Even before that, MSI X670E ACE would take 3 minutes to boot dual-rank memory and that was always connected to power.

 

[ShrimpBrime]

If you cut the power, nothing is retained. I experience this ever time I review stuff because I am always swapping stuff around. Even before that, MSI X670E ACE would take 3 minutes to boot dual-rank memory and that was always connected to power.

I cannot attest to AM5, but have more AM4 rigs set up than Intel rigs. Is this mainly a ddr5 platform issue?
And you mean flip the PSU switch or remove the plug from wall power correct?

Didnt say that.
When PC is off or when I reboot I'm in windows in 20sec.

Only when I change something in BIOS and save+exit, even if it is leds on/off then it is re-training with a total of <2.5min for seeing desktop.

Oh I see, gotcha. Jedec at system defaults generally "shouldn't" take long to memory train. All the timings are generalized 4800mhz, super wide.

I wonder if this is just a bios update away from better post times or something. I have seen a lot of platforms, none of which took that long to post. So I am so curious about that 2.5 min thing!!

 

[Wirko]

Are 8600G/8700G processors faster than those with IOD at memory training?

 

[ShrimpBrime]

3 steps.
Initialization
Train timings
Train voltages

It takes whatever it takes. Just keep waiting. If it's like 5 minutes stuck on the DRAM LED, probably not gonna post Please try again.

 

[R-T-B]

Is this mainly a ddr5 platform issue?

Yes. Though training exists in AM4 / DDR4 it happens so fast no one cares. DDR5 is a whole different animal.

 

[eidairaman1]

On my system it takes about twice as long to train 4 sticks compared to 2.

Pretty common place, i remember my rig taking time to train in 2014. I thought it failed to post but like 5 minutes went by the Splash screen showed to hit delete to enter bios lol. If after 10 minutes it doesn't post it might be a problem.

 

[ShrimpBrime]

Yes. Though training exists in AM4 / DDR4 it happens so fast no one cares. DDR5 is a whole different animal.

Makes sense. Just the way it is I guess. As long as it performs well, I can wait

 

[ir_cow]

I cannot attest to AM5, but have more AM4 rigs set up than Intel rigs. Is this mainly a ddr5 platform issue?

Just DDR5 on AM5. Never really noticed DDR4 training for AM4.

And you mean flip the PSU switch or remove the plug from wall power correct?

Either flip PSU switch or wall power. Once the juice it gone, training is needed again.

 

[Zach_01]

I cannot attest to AM5, but have more AM4 rigs set up than Intel rigs. Is this mainly a ddr5 platform issue?
And you mean flip the PSU switch or remove the plug from wall power correct?


Oh I see, gotcha. Jedec at system defaults generally "shouldn't" take long to memory train. All the timings are generalized 4800mhz, super wide.

I wonder if this is just a bios update away from better post times or something. I have seen a lot of platforms, none of which took that long to post. So I am so curious about that 2.5 min thing!!

Like I said normal boot time with JEDEC or 6000~6400 (tried those) is around 20sec
When I make changes in BIOS and save+exit it takes <2.5min for desktop (successful taining)
And when the training is unsuccessful, because I gone too crazy with DRAM settings, it takes 5-6min to boot while it has return to JEDEC settings (because of unsuccessful training).

 

[phanbuey]

Depends on the board really. There's an "Optimized Profile" on my MSI board that takes 2 mins to train, but if I use one of the memory try it settings it takes 15 seconds.