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2 Exactly the same Ryzen PC's except RAM will not run at same speed...???

Question asked by nitroviper on May 19, 2017
Latest reply on May 22, 2017 by rebelyell

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We built two PC's here are the specs.

AMD Ryzen 1700x

Cooler master water coolers.

ASUS Prime X370-Pro AM4

G.SKILL Ripjaws V Series Model F4-3200C14D-16GVR

390x videocards.

Both have the same exact bios.

PRIME X370-PRO BIOS 0604

Update AGESA to 1.0.0.4a

Leaving the Bios at default settings and only changing the XMP profile to 3200 and correct timings. Lowering the Ram to 2933 on one PC works while the other PC will not go above 2400 or it will not boot... Like I said same exact setting, one pc is able to run 2933 and one is stuck at 2400...

The ram, mobo, bios are all the same. This makes no sense to me... The Ram is Samsung B-Die

Any ideas?

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14 Replies

black_zion May 20, 2017 10:23 AM
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AMD released the AGESA 1.0.0.6 update to board partners last week which should solve those problems. Ryzen works better with Samsung B currently, but it's not guaranteed at this point.
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- nitroviper @ black_zion on May 20, 2017 3:02 PM
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  I understand all that but totally does not answer my question or even address any of it...
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  - black_zion @ nitroviper on May 20, 2017 3:54 PM
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    AGESA 1.0.0.6 will uncover 20 more memory registers. AMD said that Ryzen works BETTER with Samsung B die memory, but they did not say it works flawlessly.
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    - nitroviper @ black_zion on May 20, 2017 4:17 PM
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      Again.. that does not answer my question... Maybe you need to re read it.
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      - black_zion @ nitroviper on May 20, 2017 4:35 PM
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        Your question was "Why won't machine A run at full speed when machine B can". I told you why, until AGESA 1.0.0.6 is applied memory speeds are not guaranteed.
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        nitroviper @ black_zion on May 20, 2017 4:50 PM
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        lol omg... the pc's are exactly the same... exactly the same parts, exactly the same bios.... Waiting for someone else to reply now since you clearly are not understanding.
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        black_zion @ nitroviper on May 20, 2017 4:59 PM
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        amdmatt want to explain to this guy how two identical machines can perform differently?
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bearcat22 May 21, 2017 7:15 AM
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Google and learn about "binning". Just because you have two identical CPU's or two identical sticks of RAM that doesn't mean they will perform the same.
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- nitroviper @ bearcat22 on May 21, 2017 8:48 AM
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  Binning is not the issue, before the latest Bios I was able to get atleast 2666 out of the ram. now it wont go past 2400. The other PC stayed at 2933 thru bios updates....
  
  Binning chips according to their tolerance. If they cannot perform stable at their rated speeds they sell them as the lower model... Even if that were the case with my RAM, it still should be capable of atleast 2933 like the other PC. This isnt the problem...
  
  They take the lesser capable chips and step them down a bit and sell them as a model where they will run stock speed @ x volts 100% stable... rather then risk selling a part that might not hack it at a higher speed @ x volts and have it fail and get RMA'd
  
  Think GTX 465 vs 470... some reports indicated that some early 465 included the same configured PCB as the 470 (not missing any components) and just a lesser bios... once unlocked by some it was basically like buying a 470 for less... This isnt exactly what binning does... but it stands to reason that NVIDIA sold 470 chips that were binned lower... as 465 chips for mfgs.
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  - bearcat22 @ nitroviper on May 21, 2017 9:48 AM
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    You never mentioned about the bios updating. If the ram was running at 2666 before the update but won't now I'd try reflashing the bios. Make sure you put all settings to default before you do. That's all I can think of.
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    - rebelyell @ bearcat22 on May 22, 2017 12:58 PM
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      I agree reset all eufi settings. reflash and download all bios's use usb too flash all new bios;s ... may have a corrupt 1. 2100 is the newest. also don't forget to reboot between flashes and give plenty of time between flashing.. also since ryzen learns and stores in cache, it wouldnr be a bad idea too pull cpu and reinstall to reset as a new cpu.. and yes the flare-x 3200 are the best and binned to run at 3467mhz with 16clclocks. up both dram and ram voltages. 1 in extreme tweaker and other in digi power for boot time power. 1.4 and or 1.45 and test. also set in tweakers paradise on the very 1st setting too exactly half of your ram or dram voltage plus 1 little bump up. so if 1.4 you put .7062 .. try that...! and set all digi powers correctly to able higher ram frequencies.. also jfyi asus or ryzen doesn't like odd number timing very well, keep that in mind.
      
      do not just plug in 3200mhz clock .. work your way up so it can self teach itself... :/
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  - goodplay @ nitroviper on May 21, 2017 9:03 PM
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    Guess you swapped over the sticks on each pc, see what happens ?
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gkeawe May 22, 2017 1:56 AM
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Based on the memory specifications listed and according to the QVL listed on the G.Skill site, the memory you have is listed for the Z170 and Z270 platform for Asus. I have experienced issues trying to run memory that is NOT certified to run on an AM4 platform and now run ONLY Fortis Series or Flare X series memory that is certified by G.Skill to run on the AM4 platform. I have a Ryzen 7 1700 system running 32GB of G.SKILL FORTIS Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 2400 (PC4 19200) A MD X370 / B350 / A320 Desktop Memory Mode… no issues running at rated speed. I also have a Ryzen 5 1600X running 16GB of G.SKILL Flare X Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) AMD X370 / B350 Memory (Desktop Memory) M… absolutely no issues running at 3200MHz.

F.Y.I: the memory I had issues with trying to run on either system was: G.SKILL TridentZ Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C14D-16GTZ -…
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gigabytes May 22, 2017 12:05 PM
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It could just be a case of silicon lottery, cpu or even memory (I personally would suspect memory). Try plying the deficient one with a bit of voltage to get it to run at speed.
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2 Exactly the same Ryzen PC's except RAM will not run at same speed...???

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