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  1. #21
    ROG Guru: White Belt Array Melkor PC Specs
    Melkor PC Specs
    MotherboardMaximus VI Formula
    ProcessorIntel i7 4790K 4.7Ghz/1.28V
    Memory (part number)G.Skill TridentX 2x8GB 2400Mhz
    Graphics Card #1Asus ROG Matrix 780Ti
    Graphics Card #2Asus ROG Matrix 780Ti
    MonitorAsus VG278HE
    Storage #1Samsung EVO 850 1TB
    CPU CoolerEK Supremacy EVO
    CaseNZXT Phantom 630
    Power SupplyCorsair AX1200i
    Keyboard Razer Deathstalker Ultimate
    Mouse Razer Ouroboros
    Mouse Pad Razer Manticor
    OS Windows 8.1 64
    Network RouterAsus RT-AC66U
    Accessory #1 2x EK-FC780 GTX Ti Matrix - Nickel
    Accessory #2 2x EK-FC780 GTX Ti Matrix Backplate - Black
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    Quote Originally Posted by Raja@ASUS View Post
    You can also try this test BIOS: Maximus XI Hero test build 0037


    May not help, though, because there are many permutations and we cannot fix issues due to weak memory controller etc.


    Hello,

    I know it's a bit old thread but I want to thank You very much for this bios :-) at 0602 it was pain in the a** to get my G.Skill Trident Z 3600 CL17 2x16GB to work, when selecting XMP it would stuck at boot with 23 code, tinkering manually was better because I could boot, do some benchmarks but crashing games like BF5 or AC Origins, or sometimes hang at the reboot with 23 code. After updating to Your bios everything is working like it should, works with just selecting XMP profile, games are stable for few days already so it's a good sign ;-) once again, thanks!

  2. #22
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    I'm having the same issues on the latest BIOS, I'm using 2 * F4-4000C19-16GTZR (64GB) manually tuned at 3600mhz CL16. The BIOS won't post sometimes, but after a few attempts it'll work fine. The memory works also fine in Windows and passes 8h of memtest.

  3. #23
    Administrator Array Silent Scone@ASUS's Avatar
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    Quote Originally Posted by vinceX View Post
    I'm having the same issues on the latest BIOS, I'm using 2 * F4-4000C19-16GTZR (64GB) manually tuned at 3600mhz CL16. The BIOS won't post sometimes, but after a few attempts it'll work fine. The memory works also fine in Windows and passes 8h of memtest.
    The memory isn't fully stable and is failing POST stress tests. Normally, this can be dialed out by tuning the VCCIO and VCCSA voltages. Alternatively, relax tRCD by one clock

  4. #24
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    Quote Originally Posted by Silent Scone@ASUS View Post
    The memory isn't fully stable and is failing POST stress tests. Normally, this can be dialed out by tuning the VCCIO and VCCSA voltages. Alternatively, relax tRCD by one clock
    Thanks for the suggestion, I tried the steps but I had to dial down the memory clock to 3200mhz, which is unfortunate. To make it run at higher speed I had to enable fast boot both in Boot settings and RAM's MRC. Is there any way for anyone on your side to test these sticks?

  5. #25
    Administrator Array Silent Scone@ASUS's Avatar
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    Quote Originally Posted by vinceX View Post
    Thanks for the suggestion, I tried the steps but I had to dial down the memory clock to 3200mhz, which is unfortunate. To make it run at higher speed I had to enable fast boot both in Boot settings and RAM's MRC. Is there any way for anyone on your side to test these sticks?
    That's one of the many reasons it's not recommended to mix memory. Vendors bin these kits at the density they are sold in. The higher up the frequency spectrum you go, the less likely it is that mixing kits will work. 4000/4133MHz at that density would not only require a very good IMC, but a singular kit, too.

  6. #26
    ROG Member Array Aurosonic PC Specs
    Aurosonic PC Specs
    Laptop (Model)ASUS G501VW
    MotherboardASUS ROG MAXIMUS APEX XI bios 0231
    ProcessorIntel i9-9900k delided 5200@1.35v LLC5
    Memory (part number)2x8gb G.Skill Trident Z RGB F4-4600C18D-16GTZR @ 4600Mhz 17-19-19-38 CR2
    Graphics Card #1Gigabyte AORUS GeForce RTX™ 2080 Ti XTREME WATERFORCE WB 11G @2100/8100
    Sound CardRME Fireface UC
    Monitor2x Asus PG278Q
    Storage #1M.2 Samsung 970 Pro 512gb
    Storage #2M.2 Samsung 970 Evo 2Tb
    CPU CoolerEK-Velocity RGB - Nickel / Custom Watercooling
    CaseCaseLabs SMA8 custom
    Power SupplyCORSAIR AX1500i custom cablemod
    Keyboard Steelseries APEX RAW
    Mouse Logitech G9x Laser
    Headset Sennheiser HD250
    Mouse Pad Zowie
    Headset/Speakers Blue Sky Mediadesk 2.1
    OS Windows 10 1809
    Accessory #1 MO-RA3 Pro 4x180 Radiator, 2xD5 pumps
    Accessory #2 Hardtubing 13/10 custom waterloop
    Accessory #3 Bitspower fittings
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    A got some memory issues with my Formula XI as well. Memory kit G.Skill F4-4266C17Q-32GTZR
    Wasn't able to pass stresstests at 4266CL17 no matter which vccio and vccsa, tried up to 1.4v
    Been able to pass tests by downclocking it to 4200. After 3 month of successfull usage at one day my system hang so even reset didn't work.
    I turned off the system and on next boot i got postcode CC. None CMOS reset, retry, memok didn't help to pass this CC postcode.
    Then i've tried to check each memory stick separately and found that 1 of the sticks caused the problem. I've tried it in each of four slots and it gave me postcode CC every time.
    Once i remove this stick and leave three others, system boots perfectly fine but i had to downclock it to 4100 to make it work stable (seems like cuz of T-Topology).
    Tomorrow i'm gonna sent memory back by warranty.

    Got another kit, 2x8 this time F4-4600C18D-16GTZR. Same as previous kit it works stable only at 4100CL17 due to T-Topology. Now i've ordered APEX XI Motherboard and hopefully it'll solve all my issues and i could run at least 4400CL17 stable with my F4-4600C18D-16GTZR kit.
    9900k@5200@1.35v LLC5/Apex XI@0231/G-Skill F4-4600C18D-16GTZR/Aorus 2080ti xTream Wateblock@2100/8100

  7. #27
    Administrator Array Silent Scone@ASUS's Avatar
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    I will grab one of the validated 4 DIMM kits @ 4266 if I can and will test. It can often come down to CPU IMC strength when going beyond 4K.

  8. #28
    ROG Member Array Aurosonic PC Specs
    Aurosonic PC Specs
    Laptop (Model)ASUS G501VW
    MotherboardASUS ROG MAXIMUS APEX XI bios 0231
    ProcessorIntel i9-9900k delided 5200@1.35v LLC5
    Memory (part number)2x8gb G.Skill Trident Z RGB F4-4600C18D-16GTZR @ 4600Mhz 17-19-19-38 CR2
    Graphics Card #1Gigabyte AORUS GeForce RTX™ 2080 Ti XTREME WATERFORCE WB 11G @2100/8100
    Sound CardRME Fireface UC
    Monitor2x Asus PG278Q
    Storage #1M.2 Samsung 970 Pro 512gb
    Storage #2M.2 Samsung 970 Evo 2Tb
    CPU CoolerEK-Velocity RGB - Nickel / Custom Watercooling
    CaseCaseLabs SMA8 custom
    Power SupplyCORSAIR AX1500i custom cablemod
    Keyboard Steelseries APEX RAW
    Mouse Logitech G9x Laser
    Headset Sennheiser HD250
    Mouse Pad Zowie
    Headset/Speakers Blue Sky Mediadesk 2.1
    OS Windows 10 1809
    Accessory #1 MO-RA3 Pro 4x180 Radiator, 2xD5 pumps
    Accessory #2 Hardtubing 13/10 custom waterloop
    Accessory #3 Bitspower fittings
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    Quote Originally Posted by Silent Scone@ASUS View Post
    I will grab one of the validated 4 DIMM kits @ 4266 if I can and will test. It can often come down to CPU IMC strength when going beyond 4K.
    I'll wait till APEX XI come and test my CPU with new memory kit, so it will be evident if it was motherboard or cpu imc issue. Then i'm gonna change my kit to 2x16 4000CL19 and will OC it to 4133CL17. One of my friends got this kit on Gene XI and it works perfectly.
    9900k@5200@1.35v LLC5/Apex XI@0231/G-Skill F4-4600C18D-16GTZR/Aorus 2080ti xTream Wateblock@2100/8100

  9. #29
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    Quote Originally Posted by Silent Scone@ASUS View Post
    That's one of the many reasons it's not recommended to mix memory. Vendors bin these kits at the density they are sold in. The higher up the frequency spectrum you go, the less likely it is that mixing kits will work. 4000/4133MHz at that density would not only require a very good IMC, but a singular kit, too.
    Makes sense. The kit I have is from the same batch and has all consecutive SN. The main reason I got 2 pair of a 32GB Kit is that I cannot find any G.Skill 4000mhz CL19 RGB Kit for 64GB.

  10. #30
    Administrator Array Silent Scone@ASUS's Avatar
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    Quote Originally Posted by Aurosonic View Post
    I'll wait till APEX XI come and test my CPU with new memory kit, so it will be evident if it was motherboard or cpu imc issue. Then i'm gonna change my kit to 2x16 4000CL19 and will OC it to 4133CL17. One of my friends got this kit on Gene XI and it works perfectly.
    Two DIMMs are a lot easier at the electrical level both on the CPU and the board. Obviously, it's not possible to test 4 modules at a given speed on the Apex .

    If I can source your kit, I'll post some results with the Formula XI.

    Quote Originally Posted by vinceX View Post
    Makes sense. The kit I have is from the same batch and has all consecutive SN. The main reason I got 2 pair of a 32GB Kit is that I cannot find any G.Skill 4000mhz CL19 RGB Kit for 64GB.

    Yes, binning that many modules to work at that frequency with enough guardband is tough. Which is why you won't find many/any kits.

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