Memory context restore?

beachBOYken · 5 May 2025 at 10:21

Hello

What’s the general consensus on this setting in MB bios. I have an msi x670e tomahawk and I was recommended to disable it. Obviously it means boot times are a lot longer, anyway I just did a bios update and with settings defaulted I come to realise how super fast boot times can be with this setting enabled.

Do most here disable it though, or leave enabled?

I think I had some black screens on boot before, which was the reason to try disabling it and that seemed to solve this issue.

Just wondering though what most have it set to.

Thanks

gupsterg · 5 May 2025 at 11:31

I use MCR, as prefer the swifter boot time.

System in use:

R7 9800X3D (PBO CO +200MHz, FCLK 2200MHz)
Crosshair X670E Hero
Kingbank Dark 6800C32 2x24GB (most used RAM OC 6200C28, recently using 6400C28)
3x WD SN770 2TB
2x Samsung Evo 870 4TB
RX 7900 XTX Merc

Rroff · 5 May 2025 at 11:37

There are a couple of other settings like DRAM Power Down that can affect it as well, generally better to have it on if the setup is stable but it can have mixed results - normally you know pretty quickly if there are issues with it but if you have random problems worth trying without it as well.

gupsterg · 5 May 2025 at 12:18

DRAM Power Down, I'd say keep disabled, saves very little power, but can lead to instability.

ATIorNvidia · 5 May 2025 at 14:16

I have mine off. I would have thought though if you're just running default/XMP timings, it's generally fine to leave it on.

Tetras · 5 May 2025 at 14:24

I'd leave it off (assuming the motherboard defaults to off) unless you care about the boot time. So, like... boot the PC once a day or leave it running, then I wouldn't bother.

pastymuncher · 6 May 2025 at 08:56

I have it disabled as it was causing instability at stock settings. The boot time isn't that much longer.

Jamin280672 · 6 May 2025 at 16:38

If you have Ryzen 9000 theres no need to touch MCR, it doesnt have the slow boot problem.

Ryzen 7000 if you enable MCR, you need to enable Power down enabled otherwise youre going to get black screens or BSODs etc, personally I dont use it, it recycles old training data and doesnt always get it right as @pastymuncher found out, id rather live with a stable system and slightly slower post times.

Glanza · 6 May 2025 at 16:39

Used to have it enabled on the x670e, since going to a x870e not reenabled it, bery rarely does memory training and takes 30 seconds with 64gb.

tamzzy · 6 May 2025 at 16:56

I have MCR on
(7800x3d + b650)

gupsterg · 6 May 2025 at 18:24

Jamin280672 said:
If you have Ryzen 9000 theres no need to touch MCR, it doesnt have the slow boot problem.

I have used R5 9600X, R7 9700X, R7 9800X3D on X670E TUF and Hero, with Patriot Viper Venom 2x16GB 6200C40 (M die) and 7000C32 (A die), Kingbank Dark 6800C32 2x24GB (M die).

Both boards with any combo of above HW on various BIOS versions, default to Memory Context Restore On and Power Down Mode Off.

MCR On ~10 sec BIOS time I see in Task Manager, with MCR Off it can be upto 60 secs depending on RAM kit in use, RAM OC, so I'd say even on 9000 series there is slow BIOS time if MCR is Off.

Jamin280672 · 6 May 2025 at 20:57

gupsterg said:
I have used R5 9600X, R7 9700X, R7 9800X3D on X670E TUF and Hero, with Patriot Viper Venom 2x16GB 6200C40 (M die) and 7000C32 (A die), Kingbank Dark 6800C32 2x24GB (M die).

Both boards with any combo of above HW on various BIOS versions, default to Memory Context Restore On and Power Down Mode Off.

MCR On ~10 sec BIOS time I see in Task Manager, with MCR Off it can be upto 60 secs depending on RAM kit in use, RAM OC, so I'd say even on 9000 series there is slow BIOS time if MCR is Off.

Im using, or rather the PC I built for my wife is using a 9800X3D on a Gigabyte B850 ITX motherboard, previously she had the same 9800X3D in an ASUS B650-I motherboard which died, manual RAM timings, and have never had to touch MCR, it posts and boots and is in Windows by the time my ASUS X670E Gene with a highly tuned 7950X3D and 48gb of G.Skill RAM running manual timings @ 8000mhz CL34 has just about posted.

As I said in an earlier post, if you are running ryzen 9000 you dont need to touch MCR, but with Ryzen 7000, if you want to enable MCR you also need to enable PD otherwise it results in BSODs, instability and black screens, it worked in the beginning of 7000 series without PD enabled, but got broken along the way with bios updates and was never fixed.

Eddie99 · 6 May 2025 at 22:01

Jamin280672 said:
with Ryzen 7000, if you want to enable MCR you also need to enable PD otherwise it results in BSODs, instability and black screens

I still get blue screens with PD enabled so I keep MCR off.

gupsterg · 7 May 2025 at 08:30

Jamin280672 said:
Im using, or rather the PC I built for my wife is using a 9800X3D on a Gigabyte B850 ITX motherboard, previously she had the same 9800X3D in an ASUS B650-I motherboard which died, manual RAM timings, and have never had to touch MCR, it posts and boots and is in Windows by the time my ASUS X670E Gene with a highly tuned 7950X3D and 48gb of G.Skill RAM running manual timings @ 8000mhz CL34 has just about posted.

As I said in an earlier post, if you are running ryzen 9000 you dont need to touch MCR, but with Ryzen 7000, if you want to enable MCR you also need to enable PD otherwise it results in BSODs, instability and black screens, it worked in the beginning of 7000 series without PD enabled, but got broken along the way with bios updates and was never fixed.

My post was in relation to quoted text of your previous post.

Jamin280672 said:
If you have Ryzen 9000 theres no need to touch MCR, it doesnt have the slow boot problem.

As said in my reply, 9000 series defaults to MCR On, so people won't see slow POST.

Jamin280672 · 7 May 2025 at 16:07

gupsterg said:
My post was in relation to quoted text of your previous post.

As said in my reply, 9000 series defaults to MCR On, so people won't see slow POST.

Did you use an app of some sort to see if MCR was on by default, or did AMD just fix the slow post issue ?