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Memory power down mode MUST be on??

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#22 ·
Where is this option hidden? When I do anything on the computer, it works well, passes stress tests etc., but the moment everything stops and I leave the mouse, it shows weird stripes on the screen. Which of the recent BIOS versions has it and in which submenu is it located?
P.S. Why do Gigabyte engineers love submenus so much? 😃
 
#26 · (Edited)
Power down disabled requires mcr disabled.
Other than that on Gigabyte I only noticed it requires a bump in soc voltage.

Asus combines these 2 settings to dumb down user error. Etc pd disabled forces mcr disabled.

That's why you don't hear Asus users complaining about problems with pd disabled.

You should disable mcr anyway and force training till AMD gets there bugs worked out anyway.

PD disabled effects latency results.
 
#27 ·
'PD disabled effects latency results.'

so how? is there a link perhaps to explain what is going on in a read cycle?

This old link says power down should be left disabled

Power Down Enable - what does it do

In my BIOS settings for RAM, there is a setting for 'Power Down Enable' which is disabled by default. I'd like to ask what does this do? Is there a significant performance difference if I enable it? My motherboard is MSI 760GM-P33 . AMD 760G and SB710 Chipset. RAM is 2 x 2GB DDR3 Kingstom RAM.
forums.tomshardware.com forums.tomshardware.com

but back in that day, mcr was not a thing. I guess during mcr, if the voltage drops, the RAM` goes poof and the restored content is garbage-> crash.
 
#28 ·
Jesus, I read this too late I guess...got a new system today and it crashes so hard randomly...of course i disabled power down mode because thats what i always did....gonna test it out
 
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#33 ·
OK. I can confirm that you need to enable PowerDownEnable on Gigabyte boards to prevent BSOD (unstable system), because MemoryContextRestore is enabled by default on their boards. That's why Gigabyte boards always boot faster than ASUS and others' boards.
 
#34 ·
Up to user to turn off mcr. also up to user to disable power down. If user does not research and disables PD without disabling MCR that is user error as gigabyte did not make the cpu AMD did and there cpu is not stable with pd off and mcr enabled. It's an IMC issue. Not a board unstable issue.

PD off may require more soc voltage to be stable. Also a cpu problem. If you change a setting up to you to retest your stability with that setting.
 
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#35 ·
On B650M DS3H the last UEFI that has power down option is from November 2022, F4c agesa 1.0.0.3.
With power down disabled and MCR disabled the system is stable and has no issues, only boots longer, obviously. However, it does not have some options like trefi and overall is worse with memory than newer versions.
 
#36 ·
I just had the exact same experience with f6b on the gigabyte ds3h. Power down only stable with MCR disabled.
 
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#37 · (Edited)
alceryes said:
Ryzen 9 7950X - B650E Aorus Master - 2 x 16GB Corsair 6200MTs CL36 (CMK32GX5M2B6200C36) Currently running fine at default PBO for CPU, 2167MHz FCLK, 6200MTs for RAM. I've got a weird issue where disabling memory power down leads to my computer eventually going into a 'funk' of crashes/freezes. So far, this setting is the only consistency in the crashes. The weirdness is that if I disable memory power down in BIOS the system could run perfect for hours (benchmarking, gaming, etc.), but eventually starts crashing. Anyone else experiencing this issue? I'm running the RAM in XMP mode as these sticks aren't programmed with EXPO. I'm ready to chalk this one up to an immature BIOS but hoping others have some insight. The 7950X is an absolute beast! I'm getting a Cinebench R23 multi core score of 38396!
Click to expand...
Almost like I made this thread myself! 7950x, B650E Steel Legend, 2x16GB Gskill Ripjaws S5 XMP 6000 CAS30 (HYNIX) @ 6200 w/Buildzoids "easy Hynix memory tuning" subtimings, GDM off. PBO preset of 85c TjMAX/CO -20mv all cores, FCLK 2100, SOC @ 1.3v, RAM @ 1.4v, AGESA 1.0.0.6 38942 is the best I've gotten in R23 so far but yeah .. same thing with PDM disabled.. it would run fine for a few hours and then out of nowhere start crashing until PDM is set to auto.
 
#38 ·
lostking said:
Same here with MSI x670e Carbon. The quality of AMD’s firmware (AGESA) is a joke.
Click to expand...
Do you have a GearDownMode Option in the Bios of the Carbon?
I still cant change GDM on Tomahawk B650 with the newest Beta Bios and i wonder if the more expensive MSI Board have it

Only Problem i have with PowerDown Disabled is the Pump Header not running at 100% until Training is done...
My DDC Pump needs at least 9-10v to start but the Pump only starts after Ram Training when the UEFI Settings are kicking in
I assume they dont want the Fans running Full Speed at Boot but they should know some Pumps need more Power
 
#39 ·
Anulu said:
Do you have a GearDownMode Option in the Bios of the Carbon?
I still cant change GDM on Tomahawk B650 with the newest Beta Bios and i wonder if the more expensive MSI Board have it

Only Problem i have with PowerDown Disabled is the Pump Header not running at 100% until Training is done...
My DDC Pump needs at least 9-10v to start but the Pump only starts after Ram Training when the UEFI Settings are kicking in
I assume they dont want the Fans running Full Speed at Boot but they should know some Pumps need more Power
Click to expand...
No GDM option as today. I think all x670/b650 bios share the same code base. MSI is pretty slow to add features from its past track records.
I don’t use water cooling, but it sounds like a bug. You may submit a help ticket and post it on the msi forum.
 
#40 ·
asus x670e-e with 7950x bios program freezes if I disable memory power down (disable)
Futher i believe this is also part of acpi issues in linux kernel. It may also have something to do with cpu and socket burning. it is a memory type of thing, and seems to occur only if expo enabled
dave
 
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