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Hot!DDR4 Memory - Speed versus Timings

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GGTV-Jon
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2018/11/29 21:56:44 (permalink)
I am posting this as an continuation of a conversation that started in the Z390 Motherboard main sticky - Actual start of this memory topic
 
Visit that thread in the link above to get caught up to this point
I had posted links to two videos put out by Buildzoid where he was talking about what to look for when making your DDR4 buying decisions and the second delved more into the settings when overclocking and what some of them did:
 
DDR4 Overclocking/Buying absolute basics
 

 
 
 
 
 Some RAM Bandwidth vs frequency and timings data...
 

 
 
 
 
Unfortunately for me Buildzoid put those out after I had made my memory purchase for the system I was building (shameless plug)
 
This is the memory Kit I bought - F4-3733C17Q-32GTZR
 
Going by the calculation Buildzoid proposes at about the 16min mark in the first video My kit comes out at a whopping 219
If I had known that and looked at the numbers from the kits available at the time I would have probably gotten the F4-3200C14Q-32GTZR which nets 228 instead.
 
The F4-4000C17Q-32GTZR comes out to be 235 and the F4-4133C17Q-32GTZR only comes out at 243, but still an improvement.
 
The memory I used for the above was taken from this page on the G.Skill website - G.S Link
I had skipped over the 3466 and 3600 modules because their timings were too loose and the numbers were crap
 
Edit note: Found my original calculation for the 3200 / 14 was incorrect in my notes - fixed the incorrect numbers and had to change up my statements / thoughts
post edited by GGTV-Jon - 2019/01/12 15:02:45
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    Hawkeye360
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    Re: DD4 Memory - Speed versus Timings 2018/11/29 22:56:19 (permalink)
    It seems that RAM above 3200MHz doesn’t provide much benefit in everyday use and gaming. TPU did an article about RAM speeds and timings and concluded that 3000-3200MHz is the sweet spot.

    PS: 3200/14 is 228 and not 246, 3200/13 is 246 though! :)
    post edited by Hawkeye360 - 2018/11/29 23:20:10

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    GGTV-Jon
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    Re: DD4 Memory - Speed versus Timings 2018/11/29 23:03:55 (permalink)
    Hawkeye360
    It seems that RAM above 3200MHz doesn’t provide much benefit in everyday use and gaming. TPU did an article about RAM speeds and timings and concluded that 3000-3200MHz is the sweet spot.

    PS: 3200/14 is 228 and not 246. 3200/13 is 246 though! :)



    LOL I had found that on my own and was editing my post when you posted
     
    But I do agree, that 3200 C14 kit seems to be a sweet spot for price / performance. If you left the timings alone and bumped the speed to 3400 it would be 242 on the calculation
    post edited by GGTV-Jon - 2018/11/30 11:28:57
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    Delirious
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    Re: DD4 Memory - Speed versus Timings 2018/11/30 04:29:02 (permalink)
    That’s the kit I purchased. 3200. C14. Link posted in the Z390 section.

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    GGTV-Jon
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 15:22:12 (permalink)
    Posting for reference
     
     

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    GGTV-Jon
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 15:48:39 (permalink)
    Another good Buildzoid video on the dual rank -v- single rank memory stick topic
     



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    icslowmo
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 16:26:28 (permalink)
    One run at all auto settings XMP profile at 3200Mhz (14,14,14,34 C2) and OC'd to 3800Mhz with a little looser timings and Re set to XMP 3200Mhz profile but forced Command rate 1 vs 2.
    post edited by icslowmo - 2019/01/12 17:59:38

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    GGTV-Jon
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 16:59:46 (permalink)
    How far were you able to push it with out touching the timings from that base 14?
    And were those single run numbers or did you run that test a few times to see where the best was?
    post edited by GGTV-Jon - 2019/01/12 17:02:33


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    icslowmo
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 17:58:41 (permalink)
    Adding 3800Mhz OC but with tighter timings. Could not get CAS13 to boot. And all runs where one or two runs....

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    GGTV-Jon
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    Re: DD4 Memory - Speed versus Timings 2019/01/12 18:00:35 (permalink)
    That is a pretty good jump
     
     


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    PINKTULIP
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    Re: DD4 Memory - Speed versus Timings 2019/01/13 11:01:38 (permalink)
    icslowmo
    One run at all auto settings XMP profile at 3200Mhz (14,14,14,34 C2) and OC'd to 3800Mhz with a little looser timings and Re set to XMP 3200Mhz profile but forced Command rate 1 vs 2.


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    icslowmo
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    Re: DD4 Memory - Speed versus Timings 2019/02/21 12:53:03 (permalink)
    Ok, Buildzoid made a video on overclocking memory on my Z390 Master MB. So I followed along and got my score up a bit... LoL Memory is set to 4133mhz and voltage is now at 1.4v and VCIO and VSSA are both at 1.27v.
    post edited by icslowmo - 2019/02/21 12:57:58

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    ehabash1
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    Re: DD4 Memory - Speed versus Timings 2019/02/21 13:19:42 (permalink)
    i run typically 4000Mhz 16 16 16 36 on a maximums xi hero mobo. i was running 4100 but it was only partially stable.
     
    Its been pretty much accepted that the 3200 Cl 14 ram is the best for some reason. You will see that all over the forums and all over youtube for that matter. Even some of the famous bloggers/youtubers use it as the "gold standard"
     
    The problem is that ppl dont understand speed is more important than timings. Dont get me wrong you want both, but after seeing benchmark videos of different speeds tested i was shocked. games like shadow of the tomb raider getting 19 FPS better with 4000 19cas vs 3200 14cas. It's just really eye opening 
     
    But you will continue to see everywhere that 3200 is best and that above that there is little gaming benefit. simply false
    #13
    icslowmo
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    Re: DD4 Memory - Speed versus Timings 2019/02/21 13:24:28 (permalink)
    With this recent memory OC, I gained like 200 points in TimeSpy as well... So yes for some games, memory speed does effect performance.
     
    http://www.3dmark.com/spy/6313299
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    rusTORK
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    Re: DD4 Memory - Speed versus Timings 2019/04/21 15:18:49 (permalink)
    Hm... nice topic. I am currently looking for good RAM and thinking about to buy (if i can find someone who may actually sell it and ship worldwide):
     
    1. Team Group Dark Pro "8Pack Edition" DDR4-3200 CL14 (it will give nice 8.75ns (1/1.6*14)),
    but another option is this
    2. Team Group Dark Pro "8Pack Edition" DDR4-3600 CL16 (it will give also nice 8.89ns (1/1.8*16)).
     
    Delay between them no so huge (0.14ns), but frequency is 400 MHz, so i guess second set is more effective.
     
    Last option is
     
    3. Team Group Xtreem "OnePageBook Edition" DDR4-4133 CL18 (it will give abnormal 8.71ns (1/2.066*18)). This kit is rare and modules a bit high (47.7mm tall), so i am not 100% that they will fit in my build. Another problem is - frequency really high - i am not sure that it even run.
     
    P.S. Motherboard is X299 Dark.
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    mike406
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    Re: DD4 Memory - Speed versus Timings 2019/04/21 16:45:03 (permalink)
    Here's another good article about it: https://www.crucial.com/usa/en/memory-performance-speed-latency
     
     

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    rusTORK
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    Re: DD4 Memory - Speed versus Timings 2019/04/22 00:37:16 (permalink)
    Oh Crucial...

    “To calculate a module's true latency, multiply clock cycle duration by the total number of clock cycles.”

    And they forgot to tell how to calculate that “clock cycle duration”.

    Here it is: DDR4-2666 (for example)

    1/1,333 = 0,75ns
    1 is probably 1 second (i forgot);
    1333 - is effective frequency of DDR4-2666.
    1,333 because end result will be more accurate, instead of 0,00075...
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    frobi6852
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    Re: DD4 Memory - Speed versus Timings 2019/04/25 04:36:19 (permalink)
    Here is a good video from Linus tech tips that will help a lot of people

    https://www.youtube.com/watch?v=D_Yt4vSZKVk
    post edited by frobi6852 - 2019/04/25 04:41:10
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    xTemon
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    Re: DD4 Memory - Speed versus Timings 2019/05/05 13:09:44 (permalink)
    ehabash1
    i run typically 4000Mhz 16 16 16 36 on a maximums xi hero mobo. i was running 4100 but it was only partially stable.
     
    Its been pretty much accepted that the 3200 Cl 14 ram is the best for some reason. You will see that all over the forums and all over youtube for that matter. Even some of the famous bloggers/youtubers use it as the "gold standard"
     
    The problem is that ppl dont understand speed is more important than timings. Dont get me wrong you want both, but after seeing benchmark videos of different speeds tested i was shocked. games like shadow of the tomb raider getting 19 FPS better with 4000 19cas vs 3200 14cas. It's just really eye opening 
     
    But you will continue to see everywhere that 3200 is best and that above that there is little gaming benefit. simply false




    Good for a lot of benchmarking I think. Lower timings tend to get better results in most tests from what I recall. But as RAM speed is inextricably linked to Clock speed, you're going to find a lot of conflicting results as 1 test might prove one, while another proves the other, simply based on the particular set-up, motherboard, ratios, etc...
     
    Don't mistake me, I'm not extremely knowledgeable; I've just seen a lot of different results over the years which tend to provide conflicting information if you just look at the numbers.
     
     
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