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what voltage should i raise for XMP tweaked to be stable?

Vynra
Level 12

i got a 13900k and an apex encore. xmp tweaked creates errors. but xmp1 and xmp 2 do not create errors. what voltage should i up to make it stable. i do have a ram fan on and in tm5 extreme the highest reported temp was 50c.

my ram is 7600 gskill 

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Silent_Scone
Super Moderator

Hi @Vynra,

XMP Tweaked tunes various sub-timings and memory perametres beyond what the memory kit would have been validated for by the memory vendor and ASUS, so YMMV.

Try an additional 20-30mV on top of VDD and VDDQ, as these are the data and power voltages for the memory modules.

 

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

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Silent_Scone
Super Moderator

Hi @Vynra,

XMP Tweaked tunes various sub-timings and memory perametres beyond what the memory kit would have been validated for by the memory vendor and ASUS, so YMMV.

Try an additional 20-30mV on top of VDD and VDDQ, as these are the data and power voltages for the memory modules.

 

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

thanks, so i believe the errors were actually from Trfi being too high possibly. trfi on xmp tweaked went straight to 130,000. as soon as lowered this to 65535 all the errors seemed to stop. is it worth it to try and get over 130,000 trfi stable? or should i leave it at 65535. 

The memory likely needs more voltage. As for it's worth it, most latency adjustment gains are fairly marginal. So I'd leave that down to your discretion.

Finding instability from excess tREFI interval can be tricky using stress tests due to how the refresh process works. Suspending a system to S3 and then leaving it for a while can be quite telling if it refuses to resume successfully.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

thanks, i upped the vdd and vddq voltage to 1.43v and no more errors in tm5

so i ended up getting an error. i even up'd my vdd + vddq to 1.5 (i did increments) and still got errors. after doing some digging i found system agent voltage was 1.25. i think thats low for a 13900k with tight timings. you think upping this to 1.3 would fix it?

Some 13th gen CPUs prefer higher VCCSA, yes.  Are you actively cooling the DIMMs? 

If still getting errors with a lower refresh interval, you may need to experiment with relaxing some of the other timings with XMP Tweaked. This profile also adjusts some of the deeper MRC settings. Try increasing VDDQ TX and IMC VDD also.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

ztgst
Level 8

try imc 1.4-1.45v