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  1. #11
    ROG Guru: Brown Belt Array MrAgapiGC PC Specs
    MrAgapiGC PC Specs
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    I am ordering 32gb in 2 stick next week. since my ram came 4 in a box i will change that 3600mhz qvl in 2 stick. I did see that works better. no idea why.
    Learn, Play Enjoy!

  2. #12
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
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    Quote Originally Posted by cniedzi View Post
    I've answered your question:

    And this is an answer to your 1st question: in theory T topology makes it is easier to obtain tighter timmings & higher speed with 4 sticks kit.
    Thank you for adding the extra detail to your first reply, I very much appreciate it.

  3. #13
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 165Hz
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    Quote Originally Posted by MrAgapiGC View Post
    I am ordering 32gb in 2 stick next week. since my ram came 4 in a box i will change that 3600mhz qvl in 2 stick. I did see that works better. no idea why.
    Did you experiment yourself to see that 2 sticks of RAM are better than 4? Or is it something that you read? First hand experience is always better I would think

  4. #14
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 165Hz
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    CPU CoolerThermaltake Floe Riing 360 Premium AIO
    CaseFractal Design Define R6 Black
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    Quote Originally Posted by Mappi75 View Post
    lol running G.Skill 32GB 4.133Mhz 17-17-37 Kit the first time on the Asus Maximus XI Extreme (thanks to the 9900KS)!

    Now running (and reaching) 24 hours HCI MemTest Pro and no errors (reaching 2000% coverage).

    I would not say faster memory wont help (maybe the sweet spot is a 3200mhz) but the key are the CAS Latency and its subtimings.

    BTW: 16gb modules usual dont have very good timings like 4x8gb kits.


    look youtube videos and you will see a difference in fps in games (more than you will think).
    Thanks for your input. I find going for higher speed RAM and clocking it at about 75% of its full rated capacity e.g., 36000MHz running at 3200MHz is a good idea and a "sweet spot" with the RAM I've experimented with this far. I find I can get tighter timings that way, over running it at 3600MHz speed. Lastly, the 2 kits I mentioned in my OP are rated at the same timings, well the primary timings are at least. I am not certain about the secondary timings though. I must look into that.

    UPDATE: it is quite a challenge to find full specs for RAM. At least secondary specs are hard to find.... I couldn't find any.
    Last edited by XYchromosone; 11-05-2019 at 06:39 AM.

  5. #15
    ROG Guru: White Belt Array
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    Quote Originally Posted by XYchromosone View Post
    I find going for higher speed RAM and clocking it at about 75% of its full rated capacity e.g., 36000MHz running at 3200MHz is a good idea
    This is safe but very expensive approach 3200 can be half priced than 3600... If i can advise you, look into QVL for your MB and get RAM with speed you want and tightest timmings you can afford for your money. 3200 should be achiveable out-of-the box, any over 3600 may require BIOS tunning, and in worst case scenario - 4000+ can't be achiveable - it all depends on MC in your 9900K. Personally I tried 4000, then 3600, and finanlly I stay with 3866 17-17-17-36


    Quote Originally Posted by XYchromosone View Post
    UPDATE: it is quite a challenge to find full specs for RAM. At least secondary specs are hard to find.... I couldn't find any.
    What do you mean "secondary spec"?

  6. #16
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 165Hz
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    Yes it is an expensive method of approach. This is why I went for 3600MHZ which is the sweat spot for me at this point.

    There are 3 timings that give a specific RAM its specs, 4 if you include the speed RAM can run at in MHz these are Primary, Secondary and Tersuary timings.

    Primary timing is CAS latency e.g., 16-16-16-36. You have tRFC, a secondary timing, that works alongside tREFI, a tertiary timing. Every <tREFI>, they are recharged in order, for <tRFC> amount of time. Simply put: tRFC is the amount of time your ram can do nothing, while being recharged. tREFI = the amount of time your ram can do things, before needing recharged.
    Last edited by XYchromosone; 11-06-2019 at 05:56 AM.

  7. #17
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    Quote Originally Posted by XYchromosone View Post
    Yes it is an expensive method of approach. This is why I went for 3600MHZ which is the sweat spot for me at this point.

    There are 3 timings that give a specific RAM its specs, 4 if you include the speed RAM can run at in MHz these are Primary, Secondary and Tersuary timings.

    Primary timing is CAS latency e.g., 16-16-16-36. You have tRFC, a secondary timing, that works alongside tREFI, a tertiary timing. Every <tREFI>, they are recharged in order, for <tRFC> amount of time. Simply put: tRFC is the amount of time your ram can do nothing, while being recharged. tREFI = the amount of time your ram can do things, before needing recharged.
    When it comes with specification the primary timings tCL-tRCD-tRP-tRAS -CR are given usually on product listing, box or manufacturer site. Secondary and teriary timings are set by memory training during post and therefore are not listed. Some of XMP II profiles can include secondary/teriary timings but I'm affraid it is also not listed
    Last edited by cniedzi; 11-06-2019 at 08:59 AM.

  8. #18
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 165Hz
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    Quote Originally Posted by cniedzi View Post
    When it comes with specification the primary timings tCL-tRCD-tRP-tRAS -CR are given usually on product listing, box or manufacturer site. Secondary and teriary timings are set by memory training during post and therefore are not listed. Some of XMP II profiles can include secondary/teriary timings but I'm affraid it is also not listed
    I found AIDA64 displays the Primary and Secondary timings, which is quite handy to know.

  9. #19
    ROG 師傅 Array Arne Saknussemm PC Specs
    Arne Saknussemm PC Specs
    Laptop (Model)Laptop?...No way! (Model?...Jun Amaki...yes way!)
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    If you want to see timings in OS use memtweakit...or ASRock do a similar program...

  10. #20
    ROG Guru: Yellow Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1401]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 165Hz
    Storage #1Samsung 970 Pro NVMe 1TB M.2 SSD
    CPU CoolerThermaltake Floe Riing 360 Premium AIO
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    Quote Originally Posted by Arne Saknussemm View Post
    If you want to see timings in OS use memtweakit...or ASRock do a similar program...
    Thank you very much for the tip. I shall try your suggestions.

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