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Anybody planning a Ryzen build?

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Regarding C states, those are CPU power management settings. Enabling them allows the CPU to enter idle/low power mode when not in use. Unless you need your system running at full power all the time then you definitely want that enabled. Look for cool'n'quiet option if you can't find c-states in the BIOS and enable that.

 

We used to (up to a year or so back) have to disable C states on Ryzen systems to prevent a periodic lock-up problem. Thankfully AMD finally pinned it down to an issue with some (possibly most) power supplies dropping their voltage down when demand was idle, and not being able to ramp up quickly enough when demand resumed. To fix this all motherboard suppliers updated their BIOS, and to keep your system stable, all you need to do is find the 'Power supply idle mode' and make sure that is set to Typical Idle Current, or Common Idle Current rather than auto. The exact wording differs between motherboard manufacturers.

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On 2/13/2019 at 3:46 PM, Dev Null said:

Regarding C states, those are CPU power management settings. Enabling them allows the CPU to enter idle/low power mode when not in use. Unless you need your system running at full power all the time then you definitely want that enabled. Look for cool'n'quiet option if you can't find c-states in the BIOS and enable that.

 

We used to (up to a year or so back) have to disable C states on Ryzen systems to prevent a periodic lock-up problem. Thankfully AMD finally pinned it down to an issue with some (possibly most) power supplies dropping their voltage down when demand was idle, and not being able to ramp up quickly enough when demand resumed. To fix this all motherboard suppliers updated their BIOS, and to keep your system stable, all you need to do is find the 'Power supply idle mode' and make sure that is set to Typical Idle Current, or Common Idle Current rather than auto. The exact wording differs between motherboard manufacturers.

 Thank you. I just re-enabled C states and set power supply idle to typical. We'll see how it goes :)

 

Edit: Going back to disabling c states. Machine didn't even last 24 hrs before locking up :(

Edited by Fiala06

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Hi guys, so i've just built my New ryzen unraid server (see signature for details) 

I moved from an I3 unraid server + an i5 6600k gaming machine to this 😃

Everything is working great, i've succesfully passed my 2 graphic cards to vm and the gaming vm has quite good performance 😁

Now it's time for optimisation so is there mandatory BIOS settings to apply? 

And does a Windows vm use the Turbo capability or the cpu or is it better to overclock?

Thanks best regards

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Just ordered a 2950X Threadripper, 32GB Corsair Vengeance 3200 Quad Channel RAM all to sit on a Gigabyte X399 DESIGNARE EX Motherboard.

 

I currently have an I7-3770 so quite an upgrade 

 

Can I ask if people use CPU Pinning as a rule?  I aim to run 1 Gaming VM with a GTX 760 (Light use as only for kids) Plex and another VM for Windows apps like Goodsync.  I also have as my main Rig an I7-8700K with GTX1080i which I use for HEVC encoding & Gaming and maybe I will merge the two together, do I really need both I am wondering? 

 

I will use the Threadripper server for HEVC Encoding overnight so it won't interfere with Plex or Gaming but wondering if anyone else with Threadripper experience can offer any advice on CPU pinning, is it neccessary with so much power available?

 

Many Thanks

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Hi everybody, back to seek knowledge for fine tuning of my unraid server

 

I ran a cpumark test on a windows VM with all cores passed it barely hit 9000, ryzen 7 2700 should it around 15000

 

cpu governor is on performance and turbo boost on

 

so I tested this command cat /proc/cpuinfo | grep "MHz" to see the speed of the cores

it never goes higher than 3.4Ghz even with intense stress

 

more weird is if I run this command directly on the unraid gui selecting option 2 at boot (and not from a remote navigator) it reaches 4.1Ghz

 

So please tell me if the score on cpumark is normal and if I can do something to help the cpu to reach the turbo frequency

 

thank you 

best regards

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Posted (edited)

Ordered the ASUS ROG Zenith Extreme Alpha X399 for a new build after seeing posts on other forums about it having good IOMMU groups & working well with video card passthroughs after a recent BIOS update. I'm working on building a VM host with multiple Win10 VM's for video streaming utilizing Quadro cards. Will post stats on it in the KVM topic once I have them. Bonus perk: 10G networking!

Edited by jbartlett

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FYI: it might help someone...i'm on v6.7.0rc7 Today ive spend couple of hours investigating what has changed after i did bios update v 6903 of Asus Crosshair Hero VI, ive started to get

"2019-04-15T18:30:20.016943Z qemu-system-x86_64: vfio: Unable to power on device, stuck in D3" 

When i force close VM and try to start again, it wont run and is giving "internal error: Unknown PCI header type '127'"

 

So then ive tried to go back 1 version down - v6808, D3 issue was gone. Soon as i've enabled "Permit UEFI boot mode" and booted in UEFI mode 1 card from 2x1080ti in VM is giving those errors. So ive disabled UEFI again and it was working fine.

 

Latest FW 6903 is not working well with VMs, no clue where/what to change

2019-04-15T16:35:43.954749Z qemu-system-x86_64: -device vfio-pci,host=0b:00.0,id=hostdev0,bus=pci.0,addr=0x8,romfile=/mnt/cache/isos/Asus.GTX1080Ti.rom: Failed to mmap 0000:0b:00.0 BAR 3. Performance may be slow
2019-04-15T16:35:45.317557Z qemu-system-x86_64: vfio: Cannot reset device 0000:02:00.0, depends on group 16 which is not owned.
2019-04-15T16:35:46.387464Z qemu-system-x86_64: vfio: Cannot reset device 0000:0e:00.3, depends on group 34 which is not owned.
2019-04-15T16:35:47.407551Z qemu-system-x86_64: vfio: Cannot reset device 0000:02:00.0, depends on group 16 which is not owned.
2019-04-15T16:35:47.520017Z qemu-system-x86_64: vfio: Cannot reset device 0000:0e:00.3, depends on group 34 which is not owned.
2019-04-15T16:36:27.321705Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x40a8, 0x2bffe101,8) failed: Device or resource busy
2019-04-15T16:36:27.321756Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15000, 0x0,8) failed: Device or resource busy
2019-04-15T16:36:27.321767Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15008, 0x0,8) failed: Device or resource busy
2019-04-15T16:36:27.321780Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15010, 0x0,8) failed: Device or resource busy
2019-04-15T16:36:27.321789Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15018, 0x0,8) failed: Device or resource busy
2019-04-15T16:36:27.321801Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15020, 0x0,8) failed: Device or resource busy
2019-04-15T16:36:27.321812Z qemu-system-x86_64: vfio_region_write(0000:0b:00.0:region3+0x15028, 0x0,8) failed: Device or resource busy

 

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In regards to the "Unknown PCI header" error, try creating a new VM with the same settings, pointing to the same drives, and see if it starts. I've had such issues in the past and creating a new VM shell resolved. I'm not knowledgeable enough on the underlaying XML to debug it.

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Nothing to do with VM , as ive explained this only happens with latest Bios, when i revert 1 version back, all good again.

Ive found few topics about the D3 error on Threadripper like 1y ago, same now with latest Bios

 

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I'm wondering if anyone has had any luck with asrocks micro atx threadripper motherboard

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8 hours ago, thehacker said:

I'm wondering if anyone has had any luck with asrocks micro atx threadripper motherboard

The ATX taichi has been solid as a rock for me, I'm sure the mATX version would be fine.

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