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  Topic Review (Newest First)
05-30-2020 06:17 AM
sneida
3900x

hi,

quickly wanted to share with you my experience with the 3900x so far.

for me it works best to set everything to auto and where possible default except:
* cpu llc 1
* cpu negative offset -0.03x
* memory settings (dram calculator)
* 1usmus universal power plan

single core clock goes up to 4650mhz.
compared to all default settings the performance is not lower with the settings above, temperatures are down ~-10°C! (aida stress test ~80°C max - h150i pro with quiet settings - can't really hear it that way)
05-29-2020 01:51 PM
Kagetenshi Hi guys,
Does anyone have any bios saves they can send (on the latest bios) that can get the very limits out of boost etc on the 3900x.
I think we should start something like this and share it around. Also perhaps different common configs for different cooling or memory configurations?
Let me know what the engineers in our community think.
05-29-2020 10:54 AM
Pilotasso Thx, but thats not what I asked
05-29-2020 10:25 AM
TheRic89
Quote: Originally Posted by Pilotasso View Post
Besides a very famous tweet, any reliable source mentioned that?

I was meaning limited as in most likely no support for zen 3 on x370 or possibly beta at best as it stands now.


Sent from my iPhone using Tapatalk
05-28-2020 10:49 AM
Pilotasso
Quote: Originally Posted by TheRic89 View Post
With limited support now coming with the X370 boards, is there much benefit other than longer cpu support gained by upgrading to X570 or B550?
Besides a very famous tweet, any reliable source mentioned that?
05-28-2020 02:13 AM
SpecChum
Quote: Originally Posted by Dollar View Post
Can some owners please confirm ANOTHER very weird issue with this motherboard? Any ASUS team members lurking OCN still?


system info beforehand:
3700x (stock)
Asus Crosshair VI running latest 7704 bios

If I cold start the computer everything boots fine but if I test memory performance I can see it will be less than normal. If I restart the PC from within windows and test again then the performance is back to normal. I have confirmed this with 1usmus dram calc benchmark and aida64. The extra 1ns latency is the easiest way to tell but read and copy performance also suffer. This caused me a huge headache while tuning memory timings by making me think a specific timing or voltage had caused a performance regression when it was just a bug with this board or platform as a whole.

The second problem is just me repeating what I posted before about the sleep bug. CLDO_VDDG and CLDO_VDDP completely reset to stock values of 0.950 and 0.900 respectively if you put the computer to sleep and wake it. So if you need your 0.950 CLDO_VDDP and 1.05 CLDO_VDDG and then sleep the computer it will wake up and give you 0.900 CLDO_VDDP and 0.950 CLDO_VDDG causing instability.

If you use hibernation instead of sleep then the voltages don't get reset but that will trigger the memory performance bug I mentioned above. If you use sleep then the memory performance bug doesn't happen but your voltages get reset to stock. So I can't use either....

I know @Aretak was able to reproduce it in this thread but why is the internet so quiet about this? Is it just a few people experiencing these bugs or are people just not paying attention to the performance of their system?
My guess would be memory training, as in any of them you've got set to auto. They're maybe being trained higher from a cold start, then retrain more tighter on a warm reboot.

Only solution would be to manually set anything from auto to whatever value you know is good.

Again, just a guess.

Sleep bug is a known issue, and I don't think there's a fix.
05-27-2020 10:35 PM
Dollar Can some owners please confirm ANOTHER very weird issue with this motherboard? Any ASUS team members lurking OCN still?


system info beforehand:
3700x (stock)
Asus Crosshair VI running latest 7704 bios

If I cold start the computer everything boots fine but if I test memory performance I can see it will be less than normal. If I restart the PC from within windows and test again then the performance is back to normal. I have confirmed this with 1usmus dram calc benchmark and aida64. The extra 1ns latency is the easiest way to tell but read and copy performance also suffer. This caused me a huge headache while tuning memory timings by making me think a specific timing or voltage had caused a performance regression when it was just a bug with this board or platform as a whole.

The second problem is just me repeating what I posted before about the sleep bug. CLDO_VDDG and CLDO_VDDP completely reset to stock values of 0.950 and 0.900 respectively if you put the computer to sleep and wake it. So if you need your 0.950 CLDO_VDDP and 1.05 CLDO_VDDG and then sleep the computer it will wake up and give you 0.900 CLDO_VDDP and 0.950 CLDO_VDDG causing instability.

If you use hibernation instead of sleep then the voltages don't get reset but that will trigger the memory performance bug I mentioned above. If you use sleep then the memory performance bug doesn't happen but your voltages get reset to stock. So I can't use either....

I know @Aretak was able to reproduce it in this thread but why is the internet so quiet about this? Is it just a few people experiencing these bugs or are people just not paying attention to the performance of their system?
05-27-2020 10:26 PM
Fanu
Quote: Originally Posted by TheRic89 View Post
With limited support now coming with the X370 boards, is there much benefit other than longer cpu support gained by upgrading to X570 or B550?
If you are currently on ryzen 1xxx or 2xxx, I think a better plan would be staying on X370 and upgrading to upcoming ryzen 3600XT, 3800XT or 3900XT (or go with the 3xxx series in general), skip ryzen 4xxx CPUs and wait for Ryzen 5xxx CPUs (which will come with a new AM5 socket and DDR5 support)

Going from X370 to X570/B550 just to be able to upgrade to Ryzen 4xxx series makes little sense - it will provide same core counts (even if it provides more cores, can you really make use of more than 16 cores? If yes, you need threadripper) and at most 20% performance increase over ryzen 3xxx CPUs

Spending money on new motherboard and CPU cause of 20% performance increase and PCIe 4.0 is imo pointless - I'd rather wait AM5 and Ryzen 5xxx for a much larger performance increase and better feature set (DDR5, Thunderbolt?, more USB 3 gen 2x2 - or whatever its called, chipset that doesnt require cooling, potentially PCIe 5.0, full feature WiFi6, 5/10GB ethernet, etc)
05-27-2020 04:13 PM
MishelLngelo
Quote: Originally Posted by TheRic89 View Post
With limited support now coming with the X370 boards, is there much benefit other than longer cpu support gained by upgrading to X570 or B550?
If your hart is set to to Zen 3 and 4000 series than yes. Even if there was support for them by some miracle, it will not be full support like with 550/570.
05-27-2020 01:18 PM
TheRic89 With limited support now coming with the X370 boards, is there much benefit other than longer cpu support gained by upgrading to X570 or B550?
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