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Hammer test note in memtest86

Hopper64
Level 15
I’m getting a note in memtest86 on GSkill 5600 ddr5 cas36. Says something about errors may occur but not definite. I found the following at memtest86 website: *


*Starting from MemTest86 v6.2, the user may see a warning indicating that the RAM may be vulnerable to high frequency row hammer bit flips. This warning appears when errors are detected during the first pass (maximum hammer rate) but no errors are detected during the second pass (lower hammer rate).*

Any thoughts on this?? Thanks.***
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro
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24 REPLIES 24

Hopper64 wrote:
Yep. I simply selected XMP2 for this kit and that profile filled in 1.2V for the VDD and VDDQ fields. However, I got a ton of errors in Memtest86 v9.3 pro with that. I retested the memory at default speed with no errors at all. I noticed a few errors with increasing the VDD and VDDQ to 1.25V. Then I simply applied 1.35V to the VDD and VDDQ Â*fields and retested a final time-no errors at all. I wanted to see if it was stable with the OC. RamTest V1.1.0.0 had 1 error out to about 5000% with the OC so I reran the test with at default values-no errors. Ramtest notes on their website that the memory is good unless you have errors at default speeds. I believe the same is true for memtest86. Testing memory at default speeds/no OC is preferred. I repeated my CPU testing too after that and I had no crashes. Had a few blue screens showing memory errors in blue screen view. Adjusted the voltages on the memory and seems very stable. Used Cinebench and Intel XTU for most stability testing. Worked quite well.

Reviewed Shamino’s notes on the memory settings. He has recommended 1.35V for Samsung and has recommendations for other vendors. I think our kits of GSkill are Samsung.

Hope this helps. Â*
Thank You Hopper64. I still have the warning, but I'm without errors. Am using z690 Extreme 0308, 12900K and G.Skill Trident Z5 6000 MHz CL 36 kit.

I wasn't able to achieve stable XMP I. nor II. without Your VDD and VDDQ pushing of voltage from XMP I. preselected 1.3 to 1.35. I'll see in the morning the full pass result. I thought that my RAM kit was toast.

91527

//edit: it wasn't enough, gotten error at second pass at hammering, increased VDDQ to max. [1.435], read it from Shamino in article here, hope ot won't fry my sticks 😄

//edit #2: lowered the VDDQ to 1.375 due to significantly increased RAM stick temp. [surface went from 36°C to above 50°C]. Now Im testing VDD 1.35 and VDDQ 1.375

I measure temperature with FLiR.

Basic/Auto RAM settings work without a glitch [4000 MHz, CL 40].

Hopper64
Level 15
91192
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

rjbarker
Level 11
^^^^ Perfect thanks...Im on a ship at work...al my parts are at home and will be building once home after the 28th....just doing my typical "pre build" homework 🙂

For figuring ut what Memory chips we have I went to "My Products Page"....for me Apex, then wen to the CPU / Memory Support tab, although our exact models arent listed there yet (too early I suppose), the Memory listed does show what kind of Memory chips used.

Looks like most of the GSkills are SKHynix

I also have another kit coming Dominator 5600 C36...they appear to be Micron

iirc I read GSkill no longer using Samsung .....I didnt see any Samsung listed

Thanks again....maybe reaching out again later on if thats ok 🙂

EDIT: So I see our kits are listed on the Z690 Extreme QVL and it does say Samsung....!!!!! Funny no Corsair listed on Extreme yet....and that brand of GSkill not listed for my Apex .....likely just hasnt been confirmed tested yet, guess the QVL must grow over time?....
S

Cheers

Hopper64
Level 15
Yea. That’s how I looked up *the vendor for that particular memory kit. Then just reviewing Shamino’s tutorial gave me the voltage parameters. Mine is still on a test bench for now.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

rjbarker
Level 11
Neither my GSkill kit or another Corsair Dominator kit (I scored by shear luck) are listed on Apex QVL......normally I always ensure when getting RAM its listed, perhaps its just too early for these kits to be on Apex QVL.... ?

I would think an Apex Board either a GSkill (Samsung) or Dominator (Micron) would be fine....

Silent_Scone
Super Moderator
From experience, I find that having Memtest86 integrated in the BIOS is a godsend for one reason - not breaking the OS with very unstable settings. Once you get a baseline, you can move on to something more definitive. It simply isn't that good at finding errors like newer software is (TM5, Ramtest, HCI etc).
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Hopper64
Level 15
Maybe try bios 0811? Some reported issues with bios 0803.
MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64 wrote:
Maybe try bios 0811? Some reported issues with bios 0803.
I will also try 0811, but...

Thanks to You and Shamino I.managed stability on 4 runs, now I do another 4!:o Thank You!
91529 91528 91530 91531 91532

Thank You guys! VDD 1.35 and VDDQ 1.375 is doing the trick! Also hammering test passes w/o warnings! 😮

QUOTE=Silent Scone@ROG;853101]From experience, I find that having Memtest86 integrated in the BIOS is a godsend for one reason - not breaking the OS with very unstable settings. Once you get a baseline, you can move on to something more definitive. It simply isn't that good at finding errors like newer software is (TM5, Ramtest, HCI etc). Hmm, so MemTest won't guarantee stability of OS anymore? :confused:

uplink wrote:
I will also try 0811, but...

Thanks to You and Shamino I.managed stability on 4 runs, now I do another 4!:o Thank You!
91529 91528 91530 91531 91532

Thank You guys! VDD 1.35 and VDDQ 1.375 is doing the trick! Also hammering test passes w/o warnings! 😮

QUOTE=Silent Scone@ROG;853101]From experience, I find that having Memtest86 integrated in the BIOS is a godsend for one reason - not breaking the OS with very unstable settings. Once you get a baseline, you can move on to something more definitive. It simply isn't that good at finding errors like newer software is (TM5, Ramtest, HCI etc).
Hmm, so MemTest won't guarantee stability of OS anymore? :confused:



It never really has done, not since DDR4. That isn't to say the system won't be stable - but I would almost always run Karhu Ramtest or TM5 also.
13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Silent Scone@ROG wrote:
It never really has done, not since DDR4. That isn't to say the system won't be stable - but I would almost always run Karhu Ramtest or TM5 also.
Thank You! 🙂