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  1. #1
    ROG Enthusiast Array Zefram PC Specs
    Zefram PC Specs
    MotherboardAsus ROG Crosshair VII Hero
    ProcessorAMD Ryzen 7 2700X
    Memory (part number)G.Skill Trident Z RGB 32GB (4x8GB) F4-3600C18D-16GTZRX
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    Crosshair VII/2700x - How to get faster speeds w/ 4 DIMMs?

    Is there any way to get faster speeds on this board with 4 DIMMs populated?

    I have a use case that needs more than 16GB of memory, so I ended up using a 4x8gb config totaling 32GB. At 16GB (2 sticks) I had no problem running at 3600Mhz (the rated speed of the G.Skill memory), but with all DIMM slots populated, I can't get above 2800Mhz even with upped voltages. I know more DIMMs stress out the memory controller or whatever, but is there a way to get more speed?

    This is a pretty common problem right? What are some strategies to get better speeds with all the slots filled?

    I have G.Skill Trident Z F4-3600C18D-16GTZRX sticks. 4x8GB.

    Thanks!

  2. #2
    ROG Guru: Brown Belt Array MeanMachine PC Specs
    MeanMachine PC Specs
    Laptop (Model)I enjoy my wife
    MotherboardCVI HERO + CVII Hero Wifi
    ProcessorRyzen 7 1800X + 2700X
    Memory (part number)CMD16GX4M2B3000C15 + F4-3200C14D-16GTZR
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    Hi Zefram Not much help I know however.

    You may have a Latency mismatch by combining two different kits especially using 32GB @3600MHz with all slots occupied. If it continues and you can't combine the two kits then return what you have (if you can) or continue playing with your Timings and Voltage to get the best stable frequency.

    You would stand a better chance of getting them to their rated SPD with F4-3600C17D-32GTZR (2X16)single kit.

    Take a look at this article by RAJA : https://rog.asus.com/forum/showthrea...atoes-overview
    We owe our existence to the scum of the earth, Cyanobacteria

    My System Specs:

    MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
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    AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t

    Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2



  3. #3
    ROG Enthusiast Array Zefram PC Specs
    Zefram PC Specs
    MotherboardAsus ROG Crosshair VII Hero
    ProcessorAMD Ryzen 7 2700X
    Memory (part number)G.Skill Trident Z RGB 32GB (4x8GB) F4-3600C18D-16GTZRX
    Graphics Card #1Asus ROG Strix 1080Ti OC Edition
    MonitorAsus PG279QZ 165Hz & VG248QE 144Hz
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    yeah, I didn't put that into consideration. I figured if they were the same kit, they might work. Didn't realize that 4 sticks binned together would make such a difference. Not sure I want to go through the trouble of buying a new set, then returning the 2 new sticks, then ebaying the old 2 also.

    Maybe I should just hold out until a new bios revision or X570 and Ryzen gen 3 to come out this summer and just hope all 4 sticks will run well.

    They're stable now at 2800 at 1.4 volts... it's probably a 10% difference in games and a few other things I'm doing.

  4. #4
    ROG Guru: Orange Belt Array xeizo PC Specs
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    Use Ryzen Dram Calculator, just Google it, you wont get 3600MHz but you may get 3000 or maybe better.

    I run 4x8GB Corsair LPX at their rated 3000MHz and they ARE mismatched, one kit is from 2015 with dual rank and 25nm modules the other kit is from 2018 and is single rank with 21nm modules. Hynix AFR on both. Still it works at 3000MHz, it wouldn't have without using Ryzen Dram Calculator as there are way too many memory settings in the bios to just have luck and happen to pick the right ones.
    Last edited by xeizo; 01-16-2019 at 10:46 AM.

  5. #5
    ROG Enthusiast Array Frostie36 PC Specs
    Frostie36 PC Specs
    MotherboardCrosshair VII Hero X470 WiFi
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    Quote Originally Posted by Zefram View Post
    yeah, I didn't put that into consideration. I figured if they were the same kit, they might work. Didn't realize that 4 sticks binned together would make such a difference. Not sure I want to go through the trouble of buying a new set, then returning the 2 new sticks, then ebaying the old 2 also.

    Maybe I should just hold out until a new bios revision or X570 and Ryzen gen 3 to come out this summer and just hope all 4 sticks will run well.

    They're stable now at 2800 at 1.4 volts... it's probably a 10% difference in games and a few other things I'm doing.
    Mixing two sets of identical ram isn't always doomed to fail, i have 32gb of gksill flare x 3200mhz made up of two sets of 2x8 sticks running at their rated speed with no problems, I purchased both pairs of ram about 4 months apart. the flare x is samsung b-die , not sure what chips your ram is using, if it isn't samsung b-die then that could be why your having issues getting 4 sticks at their rated speed.

  6. #6
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    Hey, I've got that RAM! Well, I have the CL15 version, anyway. Dumb question: Have you tried any of The Stilt's settings? I've got 4x3600CL15 running at 3333CL14 thanks entirely to The Stilt's presets. I've yet to have any luck with Ryzen DRAM calculator, but it's the gold standard for overclocking so it's a good choice for everybody but me. Let me know how things turn out, I'll be curious to know what you can get!

  7. #7
    ROG Enthusiast Array Zefram PC Specs
    Zefram PC Specs
    MotherboardAsus ROG Crosshair VII Hero
    ProcessorAMD Ryzen 7 2700X
    Memory (part number)G.Skill Trident Z RGB 32GB (4x8GB) F4-3600C18D-16GTZRX
    Graphics Card #1Asus ROG Strix 1080Ti OC Edition
    MonitorAsus PG279QZ 165Hz & VG248QE 144Hz
    Storage #1500GB Samsung 970 EVO
    Storage #24TB Western Digital
    CPU CoolerCorsair H150i
    CaseFractal Design Define R6
    Power SupplyCorsair RM850x
    Keyboard Logitech G710+
    Mouse Logitech G502 Proteus Spectrum RGB
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    Quote Originally Posted by Stalkholm View Post
    Hey, I've got that RAM! Well, I have the CL15 version, anyway. Dumb question: Have you tried any of The Stilt's settings? I've got 4x3600CL15 running at 3333CL14 thanks entirely to The Stilt's presets. I've yet to have any luck with Ryzen DRAM calculator, but it's the gold standard for overclocking so it's a good choice for everybody but me. Let me know how things turn out, I'll be curious to know what you can get!
    I'll give the Stilt's settings a shot, the Ryzen DRAM calculator had no luck.

  8. #8
    ROG Enthusiast Array Zefram PC Specs
    Zefram PC Specs
    MotherboardAsus ROG Crosshair VII Hero
    ProcessorAMD Ryzen 7 2700X
    Memory (part number)G.Skill Trident Z RGB 32GB (4x8GB) F4-3600C18D-16GTZRX
    Graphics Card #1Asus ROG Strix 1080Ti OC Edition
    MonitorAsus PG279QZ 165Hz & VG248QE 144Hz
    Storage #1500GB Samsung 970 EVO
    Storage #24TB Western Digital
    CPU CoolerCorsair H150i
    CaseFractal Design Define R6
    Power SupplyCorsair RM850x
    Keyboard Logitech G710+
    Mouse Logitech G502 Proteus Spectrum RGB
    Headset Sennheiser Gaming One
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    What's the safest max voltage for ddr4? 1.5v? because I have a stable system at 1.45v at 3333mhz. If I can run that 24/7, I'd be pleased.
    Last edited by Zefram; 01-17-2019 at 07:24 AM.

  9. #9
    ROG Guru: Brown Belt Array MeanMachine PC Specs
    MeanMachine PC Specs
    Laptop (Model)I enjoy my wife
    MotherboardCVI HERO + CVII Hero Wifi
    ProcessorRyzen 7 1800X + 2700X
    Memory (part number)CMD16GX4M2B3000C15 + F4-3200C14D-16GTZR
    Graphics Card #1EVGA GTX980 SC for CVFZ
    Graphics Card #2EVGA GTX 1080 hybrid
    Graphics Card #3GTX 770 for phys x
    Sound CardMB
    MonitorHP w2408h
    Storage #1Samsung 970 EVO 500GB M.2
    Storage #2Samsung 840EVO 500GB and 960 M.2 pro
    CPU CoolerCorsair H105, H110 and H115i
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    Power SupplyCorsair AX-1200i and Antec 850 pro platinum
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    MeanMachine's Avatar
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    Quote Originally Posted by Zefram View Post
    What's the safest max voltage for ddr4? 1.5v? because I have a stable system at 1.45v at 3333mhz. If I can run that 24/7, I'd be pleased.
    1.5V with DDR4 RAM is excessive. Max is 1.35v for longevity. Keep an eye on their temperatures.
    We owe our existence to the scum of the earth, Cyanobacteria

    My System Specs:

    MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
    CPU:
    AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t

    Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2



  10. #10
    ROG Enthusiast Array Zefram PC Specs
    Zefram PC Specs
    MotherboardAsus ROG Crosshair VII Hero
    ProcessorAMD Ryzen 7 2700X
    Memory (part number)G.Skill Trident Z RGB 32GB (4x8GB) F4-3600C18D-16GTZRX
    Graphics Card #1Asus ROG Strix 1080Ti OC Edition
    MonitorAsus PG279QZ 165Hz & VG248QE 144Hz
    Storage #1500GB Samsung 970 EVO
    Storage #24TB Western Digital
    CPU CoolerCorsair H150i
    CaseFractal Design Define R6
    Power SupplyCorsair RM850x
    Keyboard Logitech G710+
    Mouse Logitech G502 Proteus Spectrum RGB
    Headset Sennheiser Gaming One
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    Quote Originally Posted by MeanMachine View Post
    1.5V with DDR4 RAM is excessive. Max is 1.35v for longevity. Keep an eye on their temperatures.

    I'm not quite sure that's true. There are DDR4 kits rated for 1.4v 24/7 usage ... and the max tech spec for ddr4 is 1.5v. I've got my 4 sticks at 1.425v @ 3333Mhz, so I'll be sticking with that for now.

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