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Hot!X299 Dark memory performance issue

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Woomack
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2019/03/29 01:48:21 (permalink)
I'm usually solving other people problems but I can't find a solution to this one.
I got the X299 Dark yesterday (just wanted to play around since the recent price drops) and at first, I had constant A1 memory slot error. Somehow it passed after I removed all RAM from other slots and used only A1 slot. I have no idea what was that and I hope it won't back. Now there is some other issue which I noticed. Memory write, no matter how I set my RAM, is almost always at 50% expected performance. For example when I set the memory at 3000 then I get something like ~58GB/s read, ~55GB/s copy but ~32GB/s write. The same problem at auto, XMP or manual settings. Results in AIDA64.
 
So far I've checked 3 BIOS releases (including the last one). Higher SA/DIMM voltages and mentioned auto/XMP/manual memory settings. This issue usually happens when sub-timings are wrong but at SPD profile everything should work fine. When I set auto/SPD 2133 then write bandwidth is also slightly above 30GB/s. When I set higher mesh clock then read/copy go up, write not really. Then is something like 60GB/s read/copy and 32GB/s write.
 
I had only one quad kit for tests yesterday but will check it on some other kits during the weekend.
Used memory was 4x16GB Ballistix Elite 3000 / Samsung B-die. The same memory was tested on at least 8-9 different X299 motherboards in the past.


 
#1

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    GGTV-Jon
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    Re: X299 Dark memory performance issue 2019/03/29 03:26:09 (permalink)
    Have you turned on Force Memory Retraining in the bottom of the memory section?
     
     

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    #2
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/29 03:35:12 (permalink)
    Not yet, will try it later, thanks.
    post edited by Woomack - 2019/03/29 03:44:53


     
    #3
    jab383
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    Re: X299 Dark memory performance issue 2019/03/29 05:44:25 (permalink)
    I get the 50% write bandwidth in A64 when related third settings are a little high, where default profiles often put them. 
     
    WrWr_dg is usually the culprit for me and needs to be at minimum.  WrWr_sg can often be reduced from default as well.  On recent 2011/3 and 2066 boards, CCD_WR and CCD_WR_L are as important.  The suggestion: try setting those lower by 1 per step and one at a time - normal memory tuning procedure.  Expect a lot of boot failures when the settings go below minimum.
    #4
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/29 06:03:03 (permalink)
    I thought I did that already but will check again later today. Thanks.
    On other mobos the same was happening when BIOS was setting timings automatically at 4000+. Then simple manual settings were solving it. Also on SPD/XMP profiles were no issues while now I have it even at 2133 what is weird.
    This is my first EVGA mobo so I still have to spend some time on various settings.


     
    #5
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/29 13:17:12 (permalink)
    @GGTV-Jon, enabled force retraining didn't help
    @jab383, I don't even have these timings on the list but I know what you mean, different motherboard and a bit different naming ... anyway, I was checking whatever is available and no matter what I do with tertiary timings then result is the same. Or no boot when is too tight or ~33GB/s write. Btw. GGTV-Jon submitted list of available timings in post #2.
     
    When 4x8GB 4000 memory is installed then is exactly the same at auto, xmp@3600 or manual settings. At 4000 XMP it doesn't work but it's not important right now.
     
    Will check some more and report if I make any progress.


     
    #6
    GGTV-Jon
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    Re: X299 Dark memory performance issue 2019/03/29 13:47:36 (permalink)
    Woomack just for clarity what is the exact part number for the kit you have. I want to look it up when I get home from work this evening


    #7
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/29 14:26:33 (permalink)
    So far tested with:
    - Ballistix Elite DDR4-3000 - BLE16G4D30AEEA, actually 4 matching 16GB sticks, Samsung B / SPD 2133
    - HyperX Predator + Predator RGB DDR4-4000, 2 kits of 2x8GB, the same IC, the same SPD/XMP, the only difference is that one has RGB LEDs and the other one not - HX440C19PB3K2/16 / Samsung B / SPD 2400
    I doubt it's related to my memory kits.
    One thing to add. In dual channel write is ~30GB/s, in quad channel ~32-33GB/s.


     
    #8
    GGTV-Jon
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    Re: X299 Dark memory performance issue 2019/03/29 19:35:59 (permalink)
    Woomack my apologies. I had posted the above while looking at the EVGA forums on my phone during lunch break and for some reason I had it in my head you were also having the XPM speed issue posted here - https://forums.evga.com/FindPost/2938936
     
    As for the difference in quad / dual channel the increased throughput is expected, this board really does work best with all 4 slots populated


    #9
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/30 03:39:25 (permalink)
    My point with dual/quad channel was that in quad channel in AIDA64 I have something like 58GB/s read, 32GB/s write, 55GB/s copy , in dual channel 38 / 30 / 33GB/s so as you see, read and copy are scaling in a normal way, write not. I've tested at least 10 different X299 motherboards including ASRock ITX with SODIMM or SuperO and I had no problems like that on any of them.
     
    XMP works fine as I see, it's just that XMP profile doesn't include anything besides main timings and maybe 3-4 other settings. Everything else sets the motherboard.


     
    #10
    GGTV-Jon
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    Re: X299 Dark memory performance issue 2019/03/30 10:44:48 (permalink)
    I was under the impression a person was to run it with the relearn set till they were happy (reboot / test a few times) then turn it off. Then do any final tweaking if needed.


    #11
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/30 10:47:15 (permalink)
    I was looking for an issue in the motherboard or memory settings while it was the CPU. I got unpacked but new 7800X the same day as the X299 Dark. Today I switched CPUs with my other rig and exactly the same happened on the other board. This CPU limits memory write bandwidth for some reason. It's really weird and it was the last thing I would expect. Have to return it to the store on Monday.
     
    Thanks for your time reading and answering to my posts. I can finally start to play with the new mobo. Will post some results later.


     
    #12
    GGTV-Jon
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    Re: X299 Dark memory performance issue 2019/03/30 10:54:07 (permalink)
    Woomack
    I was looking for an issue in the motherboard or memory settings while it was the CPU. I got unpacked but new 7800X the same day as the X299 Dark. Today I switched CPUs with my other rig and exactly the same happened on the other board. This CPU limits memory write bandwidth for some reason. It's really weird and it was the last thing I would expect. Have to return it to the store on Monday.
     
    Thanks for your time reading and answering to my posts. I can finally start to play with the new mobo. Will post some results later.




    Yea, the CPU heavily impacts the memory on this platform. It is not enough of a lottery for a good overclocker but also have to factor in the IMC performance as well


    #13
    Woomack
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    Re: X299 Dark memory performance issue 2019/03/30 11:02:23 (permalink)
    It's not the performance issue or luck to a good overclocker. The CPU is simply broken. It's 50% slower in some bandwidth tests at the same settings as reference results in benchmark database. It hits a wall at ~32-33GB/s on 2 totally different motherboards while the other CPU on the same BIOS profile runs at 80GB/s+.


     
    #14
    hotrod717
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    Re: X299 Dark memory performance issue 2019/04/11 15:44:36 (permalink)
    Interesting.
    #15
    MaddMutt
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    Re: X299 Dark memory performance issue 2019/04/14 14:11:13 (permalink)
    The link here says to limit your memory to 3600 and tighten the timings - xdevs.com/guide/e299ocg/#smemoc
     
    I don't think I'm special or have a special CPU/Memory set. I'm a nobody @ the Bot but some of you already know me :) I've meet Hotrod717 at Philly last year and me and Woomack are working the cpu/memory side @ OCF :)
    I can show the increase scaling from 3600 -> 4000 @ 16-16-16 1T with 1.6v->1.750. I hope to Improve my scores :)
    The First Pic is AIDA64 Test @3600,3733,3800,and 4000.
    I thank You For Any Assistance :)
     
     
     
    post edited by MaddMutt - 2019/04/14 14:41:45

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    - General George S. Patton Quotes“It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived.”

    “You’re never beaten until you admit it.”
    Wars may be fought with weapons, but they are won by men.
    #16
    MaddMutt
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    Re: X299 Dark memory performance issue 2019/04/14 14:44:00 (permalink)
    Here is the 2nd part with the CB15 tests @3600,3733,3800,and 4000 <- with this score being lower than the run @3800
     
    Thank You

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    - General George S. Patton Quotes“It is foolish and wrong to mourn the men who died. Rather we should thank God that such men lived.”

    “You’re never beaten until you admit it.”
    Wars may be fought with weapons, but they are won by men.
    #17
    hotrod717
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    Re: X299 Dark memory performance issue 2019/04/14 15:57:22 (permalink)
    It's dependent on the amount or number of sticks and the CPU running.
    In dual-channel, two Sticks, 4000 is quite doable.
    #18
    bcavnaugh
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    Re: X299 Dark memory performance issue 2019/04/14 16:07:21 (permalink)
    I am watching this ATM   The Travelers Episode
    Quad Channel Memory Runs Better and Overclocks Better than Dual Channel Memory on the X299 Dark Motherboard.
    That is you will get better Memory Performance running Quad in the end.
    post edited by bcavnaugh - 2019/04/14 16:17:57


    #19
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