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  1. #1
    ROG Enthusiast Array 78Staff PC Specs
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    MotherboardCrossHair VIII Hero WiFI 3601beta
    ProcessorAMD Ryzen 5950X
    Memory (part number)GSkill RipJaws 3200 C14 4x8
    Graphics Card #1PowerColor Radeon RX 5700XT
    MonitorViewSonic 38" VP3881
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    Accessory #1 Asustor AS5304T

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    Crosshair VIII Hero (wifi) 4-simm stability issues solved?

    So a couple months back, there were several threads onging regarding the C8H and 4 dimms - I was involved for a bit and had tried a few 4x kits but never could stay stable. Since I was still running a 3900X I wound up going back to my GSKILL 3200 4x8 (single rank) dimms and all has been swell since.

    BUT, now I finally have a 5950X on the way, so am looking to jump back up to a 4x16 3600 kit if possible? Or are we still seeing stability problems with 4x dual rank DIMM's? I could go 2x32 instead I suppose (which was one of the recommendations) but I thought the 4x dimms is the preferred config on the Ryzen 9's?

    I recall some wound up just switching MB's to Aorus or GB - is that still the answer to using 4x DIMMs? I could go that route if needed, but would prefer to avoid and keep the C8III if possible.

    This is the kit I was looking at - GSkill Neo F4-3800C14Q-32GTZN, or Royal F4-3600C14Q-32GTRSB, which I think I prefer if going RGB) - but am open to others - RGB or not really doesn't matter.

    EDIT - For info, looking at more productivity/content creation/development than gaming - only gaming I do is occaisional MSFS .
    Last edited by 78Staff; 06-01-2021 at 02:14 PM.

  2. #2
    Administrator Array Silent Scone@ROG's Avatar
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    Hello,

    Would need more context. I've not had any issues running 4 modules on the Crosshair 8 Hero up to 3800 with my current 5950X or my previous 3950X. Your question is more attributed to 64GB at 3600 and beyond rather than number of ranks, as this is tough on the Infinity Fabric. For best chance of plug and play, you'd need to weigh up whether you need this much memory vs what speed is obtainable for most CPU samples at that density


    BIOS 1201.
    3950X
    4x8GB 3733

    Click image for larger version. 

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    Last edited by Silent Scone@ROG; 06-01-2021 at 05:53 AM.

  3. #3
    ROG Enthusiast Array 78Staff PC Specs
    78Staff PC Specs
    MotherboardCrossHair VIII Hero WiFI 3601beta
    ProcessorAMD Ryzen 5950X
    Memory (part number)GSkill RipJaws 3200 C14 4x8
    Graphics Card #1PowerColor Radeon RX 5700XT
    MonitorViewSonic 38" VP3881
    Storage #1Sabrent Rocket 4 Plus 2TB/1TB
    Storage #2Samsung 860 Evo 4Tb x3
    CPU CoolerArtic Freezer II 420
    CasePhanteks P600S
    Power SupplySeasonic PX-1000
    Keyboard Logitech G915
    Mouse Logitech G Pro Wireless
    Headset Logitech G Pro X Wireless
    Headset/Speakers Creative Pebble V2
    Network RouterRT-AC88U
    Accessory #1 Asustor AS5304T

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    Similar to you I am currently running 4x8 RipJaws 3200 C14 now with the 3900x. Completely stable at DCOP. Previously I had tried a few different 4x16 kits - Trident Z Neo C16 and Royal C14's, but could not keep them stable at DCOP even with quite a bit of tweaking of voltages, per previous guides, etc. All DIMMS passed extensive Kharhu testing.

    I might be mis-remembering but I though it was generally determined that the Ryzen memory controller just had a hard time with 4x dual rank DIMMS, which is why several folks wound up changing over to the Aorus Extreme or MSI Godlike. So it was just larger dual rank dimms?

    So if sticking with 32GB, then 4x8 dual rank should pose no issues ie the Neo or Royal 3600 C14/C16's? For 64GB, stick with same but in 2x32 3600 C18's is safest option to remain stable?

  4. #4
    ROG Member Array Ziggiesden PC Specs
    Ziggiesden PC Specs
    Laptop (Model)Alienware Area51-m i9 10900K 64GB 4TB (RAID 0)
    MotherboardASUS ROG Crosshair VIII Hero & Formula
    Processor2*AMD Ryzen 9 3950X Processor @4.315Ghz
    Memory (part number)Corsair Vengeance LPX 64@4000Mhz
    Graphics Card #1Asus TUF 3090 OC 24GB
    Graphics Card #2EVGA GeForce RTX 2080 Super XC Ultra (Overclocked)
    Graphics Card #3NITRO+ RADEON RX 5700 XT SP ED
    Graphics Card #4Sapphire Nitro+ Radeon RX 5700 XT 8G, 8192 MB
    Monitor2* 55 Inch Samsung Curved TV's 4K
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    CPU CoolerNZXT Kraken X62 280mm
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    Power SupplyCorsair AX1600i / BeQuiet 1000 W Dark Pro 11
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    Mouse Logitech M310
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    Headset/Speakers 2*Q60T
    OS Windows 10 Enterprise
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    Accessory #1 LSI MegaRAID SAS 9271-8i 1GB DDRIII 8 Port 6Gbps PCIe 3.0 SATA SAS RAID Controller Kit

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    Alas, not entirely solved

    I've Trident Z Neo F4-3800C14Q-32GTZN running ok on my Formula VIII board and my Hero VIII has Corsair Vengeance LPX 64 GB (4 x 16 GB) DDR4 4000 MHz C18 - I've got them both working with AMD Ryzen 9 3950X. However, each new BIOS has been, shall we say, an adventure.

    Both kits work but the RAM training has been weird and simply won't fire up on every BIOS - but they do work so good luck with your new setup!




    Quote Originally Posted by 78Staff View Post
    So a couple months back, there were several threads onging regarding the C8H and 4 dimms - I was involved for a bit and had tried a few 4x kits but never could stay stable. Since I was still running a 3900X I wound up going back to my GSKILL 3200 4x8 (single rank) dimms and all has been swell since.

    BUT, now I finally have a 5950X on the way, so am looking to jump back up to a 4x16 3600 kit if possible? Or are we still seeing stability problems with 4x dual rank DIMM's? I could go 2x32 instead I suppose (which was one of the recommendations) but I thought the 4x dimms is the preferred config on the Ryzen 9's?

    I recall some wound up just switching MB's to Aorus or GB - is that still the answer to using 4x DIMMs? I could go that route if needed, but would prefer to avoid and keep the C8III if possible.

    This is the kit I was looking at - GSkill Neo F4-3800C14Q-32GTZN, or Royal F4-3600C14Q-32GTRSB, which I think I prefer if going RGB) - but am open to others - RGB or not really doesn't matter.

    EDIT - For info, looking at more productivity/content creation/development than gaming - only gaming I do is occaisional MSFS .

  5. #5
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    Strange, the post I made yesterday seem to have disappeared.
    This board has serious issues with 4 modules dual rank. Especially Samsung C-die.
    I've got 4 x16GB dual rank and they don't run at their rated speed, 3000 Mhz is the most I can do and it's not even stable.

    Cheers.

  6. #6
    ROG Member Array D_BRASCO PC Specs
    D_BRASCO PC Specs
    MotherboardASUS ROG CH8DH
    ProcessorAMD Ryzen 9 5950x
    Memory (part number)64GB G.Skill F4-3600C16D-32GTZNC
    Graphics Card #1NVIDIA Geforce 3090 FE
    Storage #1Seagate FireCuda 520 2TB PCIe Gen4
    Storage #2Seagate FireCuda 520 2TB PCIe Gen4
    CPU CoolerEK Custom loop
    CaseLian Li Dynamic 011 XL ROG
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    Keyboard Corsair K95
    Mouse Elecom HUGE
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    OS Windows 10 PRO
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    Accessory #2 Hitachi HDS724040ALE640 (PKV331P1GN0EDY)

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    I've had no trouble running G. Skill F4-3600C16Q-64GTZNC at 3800mhz @ 1.38V on my Hero with a 3900xt or my Dark Hero at 3800mhz @1.38v with a 5950x

  7. #7
    Administrator Array Silent Scone@ROG's Avatar
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    Quote Originally Posted by Escorpiom View Post
    Strange, the post I made yesterday seem to have disappeared.
    This board has serious issues with 4 modules dual rank. Especially Samsung C-die.
    I've got 4 x16GB dual rank and they don't run at their rated speed, 3000 Mhz is the most I can do and it's not even stable.

    Cheers.


    This has less to do with the number of ranks. The memory density puts the most strain on the Fabric, thus the CPU sample is important.
    Last edited by Silent Scone@ROG; 06-03-2021 at 06:28 AM.

  8. #8
    ROG Enthusiast Array 78Staff PC Specs
    78Staff PC Specs
    MotherboardCrossHair VIII Hero WiFI 3601beta
    ProcessorAMD Ryzen 5950X
    Memory (part number)GSkill RipJaws 3200 C14 4x8
    Graphics Card #1PowerColor Radeon RX 5700XT
    MonitorViewSonic 38" VP3881
    Storage #1Sabrent Rocket 4 Plus 2TB/1TB
    Storage #2Samsung 860 Evo 4Tb x3
    CPU CoolerArtic Freezer II 420
    CasePhanteks P600S
    Power SupplySeasonic PX-1000
    Keyboard Logitech G915
    Mouse Logitech G Pro Wireless
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    Accessory #1 Asustor AS5304T

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    5950x arrived and is definitely all it's cracked up to be . Haven't made a decision on memory yet, but my existing RipJaws 4x8 3200 C14 works fine so far.

    My Creative Pebble USB Speakers don't work for some reason after the CPU change. Not sure if due to the USB issues that were reported early on, I thought they have that solved? Running latest 3601beta and current AMD Chipset Drivers. Not the end of the world, I can use monitor speakers or switch back to non-USB style speakers. Other USB items appear to be working fine so far, ie Ext WD 14TB, Logi Lightspeed components and Pro Wireless Headset, Sony XQD Card Reader, etc.

  9. #9
    ROG Enthusiast Array 78Staff PC Specs
    78Staff PC Specs
    MotherboardCrossHair VIII Hero WiFI 3601beta
    ProcessorAMD Ryzen 5950X
    Memory (part number)GSkill RipJaws 3200 C14 4x8
    Graphics Card #1PowerColor Radeon RX 5700XT
    MonitorViewSonic 38" VP3881
    Storage #1Sabrent Rocket 4 Plus 2TB/1TB
    Storage #2Samsung 860 Evo 4Tb x3
    CPU CoolerArtic Freezer II 420
    CasePhanteks P600S
    Power SupplySeasonic PX-1000
    Keyboard Logitech G915
    Mouse Logitech G Pro Wireless
    Headset Logitech G Pro X Wireless
    Headset/Speakers Creative Pebble V2
    Network RouterRT-AC88U
    Accessory #1 Asustor AS5304T

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    Quote Originally Posted by D_BRASCO View Post
    I've had no trouble running G. Skill F4-3600C16Q-64GTZNC at 3800mhz @ 1.38V on my Hero with a 3900xt or my Dark Hero at 3800mhz @1.38v with a 5950x
    I ran that same set with a 3900X but could not keep it stable at DCOP even with increased voltages and adjustments. Maybe my 3900x was just not suitable for running 4x dual rank dimms.

    I guess I need to start over with the 5950x now, past results wouldn't be valid.

    Going to order the G.Skill F4-3600C16Q-64GTZNC's and start there.

    Also figured out my USB Speaker issue, we'll just call it... operator error lol.
    Last edited by 78Staff; 06-06-2021 at 03:57 AM.

  10. #10
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    I also use F4-3600C16Q-64GTZNC without issues.

    [QUOTE=78Staff;835675]I ran that same set with a 3900X but could not keep it stable at DCOP even with increased voltages and adjustments. Maybe my 3900x was just not suitable for running 4x dual rank dimms.

    I guess I need to start over with the 5950x now, past results wouldn't be valid.

    Going to order the G.Skill F4-3600C16Q-64GTZNC's and start there.

    Also figured out my USB Speaker issue, we'll just call it... operator error lol.[/QUOTEi]

    I also use the F4-3600C16Q-64GTZNC set on my crosshair VIII Hero Wifi, with a Ryzen 9 3950x. I just enabled DOCP mode to use the pre-set timings for the set. I haven't tried to manually tweak higher settings, nor will I. Have had zero stability issues in every bios version I've had installed on it up to the current version: 3601. I chose that set because it seemed over all to be the best 4 dimm set for 64GB, with the lowest timings that was in the whitelist (that was available in stock at the time of the purchase).

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