AMD WITH 4 DIMMS

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_tucker_

_tucker_

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I'm just curious if anyone has had issues with using 4 sticks of ram with amd CPU.

I'm using
crosshair viii dark hero
5900x
and the ram is corsair https://www.corsair.com/uk/en/Categories/Products/Memory/DOMINATOR-PLATINUM-RGB/p/CMT32GX4M4C3600C18

only reason for the ram is i won it in a raffle and tried them with my build and they worked fine but recently ive been having crashes and i cant find any errors about it but i read online that amd run best with only 2 sticks of ram and not 4, i checked my mobo and it does support my ram but on the amd site it doesn't list my model number for the ram so im worried now they are not supported and that's why I'm getting problems.
i did run mem test and they come back fine but maybe that's because the ram is fine but just not supported?
I've only ever had intel so I'm not too sure with amd architecture

i did try with different bios versions and i still got the crash but it was running for about 9 months flawlessly
 
it should work. Did you fully reset the bios and the XMP/DCOP settings in the ram section of the bios to tell it to pick up the new timings of the ram rather than using the old ram settings.

There seems to be a bit of an issue with the 5xxx ryzen chips in some cases with the theme being crashes and instability not when being stress tested, but more when used lightly. As I understand it, the new chips aggressively seek low power usage and / idle states in light loads and can jump in an out of them very quickly. From reading there have been a few suggested situations related to this where the PC can throw a wobbly...

- AMD try to keep the core voltage levels all round low to lower temps etc ... and sometimes with the silicon lottery that is simply just not enough at its default setting. The fix in some cases being to apply a slight positive offset.

- in the very low idle states, the cpu draws so little power, PSU's can consider it to be a fault, and kill the power momentarily, leading to crash. Possible fix - change the idle state setting in bios to typical ( that way the CPU will always draw a few watts to ensure the PSU thinks the CPU is present )

- by dropping to such a low idle states, the system also lowers the core voltage supplies ... when it wants to wake up, the supply doesn't respond quick enough and the chip undervolts leading to a crash.

- the fabric joining the CPU to the ram also drops into idle states ... possibly creating similar issues with not being able to wake up or get enough voltage quickly leads to errors. Possible fix - disable DF C-states in the bios so that the fabric wont seek low power idle ( a setting hidden way down in the bios and is different from the global c-states setting ) << to me, this might be why I have been seeing memory errors, as I've had my ram and main board for a fair time now fully stable. Since adding the 5800x, its shown crashes.

Google AMD Ryzen idle crashes and it'll bring up a lot of threads talking about crashing 5xxx systems. I'm beginning to think that possible AMD have released hardware which is pushing the other aspects of the system to the limits, and in more cases tipping the balance into crashes.
 
Brother is using four dual rank Crucial sticks with his 3800X, no issues when I was setting it up. RAM compatibility problems were mostly limited to Zen 1/Zen+. 99% of DDR4 will work, regardless of it being on the Motherboards compatibility list or not. How have you narrowed the crashes down to the RAM?
 
There are just a couple of factories that manufacture chips
Memory manufacturers buy the chips to make memory modules
So the memory chips will be the same on many memory of different brands
The motherboard manufacturers supported memory list exists for compliance and as a scapegoat
If the company receive support request and your memory is not on the list they will tell you to:
DO NOT BOTHER US WITH MEMORY NOT ON THE LIST
in essence if the memory works and the motherboard works 99.9% positive it should just work
 
I'm using 4 Team Group 3600 c14 dimms with my 5900x (2 kits). I had a few issues until I enabled gear down mode.

I'd turning GSM on then manually configuring your frequency, primary timings and voltage.
 
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