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Crosshair VI Hero: UEFI build update thread

Level 13
Directly from Elmor:

Beta BIOS 3008 for C6H/C6HWIFI/C6E:

AGESA, temperature offset fixed after S3 resume, GPU Post function fixed, 0d with some GPUs fixed

C6H Test BIOS 0020 with AGESA 1007 (405200c4e299c1eed9a0044edec9aba51f37cee1d70caabe40b9485b0604521a)

In order to get back to an older version after flashing, you have to use USB BIOS Flashback.

Let me know how it works for you, especially regarding cold boot issues. Any confirmed bugs in the bug report form please

Beta BIOS 1501

* Workaround for some CPUs stuck at 22x ratio if using override voltage
* Fixes PCIEX4 bandwidth setting getting lost after power is removed
* Same DRAM boot behavior as 1403 (no cold boot fix)
* Same DRAM profiles as in 9920
* Still has the Vcore value issue when booting with Offset Mode and switching to Manual Mode

Crosshair VI Hero 1501 SHA256 EDE223DC6897B7199C93D9985E28B7A2CD1B8A8DB2DCBF3D3555A521DB4F045D
Crosshair VI Hero Wifi AC 1501 SHA256 0D9F51F43AA3A56A4AC984B11A52F58451B76F8A7CCB9A04E1C3194231C9D4DA

UEFI build 9920 for the C6H:

* Improved DRAM cold boot, results in slightly longer POST time
* Fix for CPU Ratio stuck at 22x on some CPUs when using Vcore override/offset
* SenseMi Skew is now Disabled by default. If you want to return to previous behavior set SenseMi Skew = Enabled and Offset = 272.
* Added DRAM profiles for Samsung B-based DIMMs with tuned subtimings, including The Stilt's settings

C6H beta UEFI 1403

* Fixed W_PUMP and AIO_PUMP speeds during POST
* Fixed Fan tuning sometimes failing
* Fixed a few issues with AMD USB3.1 ports
* Some tuning on DRAM settings, let us know how they work for you. tRDRD_Sc is still at 5 above 3500 MHz as it helps with stability. For performance you want to force this to 1. We'll consider changing this in future releases as the performance impact can be quite noticeable in certain applications.

An update on DRAM Boot Voltage, currently it should be 1.35V by default if the DRAM Voltage is changed. So if you're setting DRAM Voltage to above 1.35V, you might want to sync this setting. Additionally there might be scenarios where you will have better luck by syncing DRAM Boot Voltage to DRAM Voltage even at lower values.

AGESA 1006 RC4 official UEFI 1401

Just tested quickly 3600 memory and cold booting, seems good but you guys are going to have to help me test this before we have a judgement. Seems CPU temp reading from SIO now has -20*C offset for XFR enabled CPUs.

UEFI build 1107

Older test builds:

Test BIOS 0079

Test BIOS with new AGESA 1004a, with a couple of bugfixes. Up to 5% performance increases in specific applications. Also has P-state overclocking working with BCLK increase. If you want to keep C-states, make sure to set Advanced\AMD CBS\Zen Common Options\Global C-state Control = Enabled. There are two new settings under AMD CBS\UMC Common Options\DDR4 Common Options\ you might want to take a look at, Fail_CNT and ProcODT. Fail_CNT decides how many times to retry when DRAM training fails (F9 -> 0d), default is now 1. ProcODT can help improve your DRAM overclocking. There's a setting available also on previous BIOSes under AMD CBS\UMC Common Options\DRAM Memory Mapping named BankGroupSwap. If you have 2x Single-Rank modules you can try setting this to Disabled and you might see some performance boost in certain applications.

Test BIOS 0081

Same as 0079 but has ProcODT default = 53.3 ohm

Test BIOS 0082

Same as 0081 but with a DRAM compability patch for the below part numbers



Test BIOS 0083

Same as 0081 but with "2T" DRAM Mode when using above 2666 DRAM Ratio.
2,794 REPLIES 2,794

Level 9
As far as I can tell, the best BIOS for Gen 1 Ryzen is 3008, after that they started to optimize for Ryzen 2. Because of this you need to add more Volts to keep the same clocks as before. If you are already close to the limit then it's curtains!

So with Gen 1 Ryzen I would not update past 3008.

I'm currently on 6001 (latest) but am considering going back.

Level 7
I switched to 6001 yesterday, because I got new Memory. (Corsair Dominator Platinum 3466Mhz)
They run at 3333Mhz with 16-17-17-17-35-51 Timings
3466Mhz not possible to boot. I tryed timings up to 21 *lol*

I was looking for the 3008 Bios file for you guys but wasn't able to find them.
I may have formated the USB Stick.

I'm also thinking to switching back to 3008
6001 has some issues with the voltage settings. Not sure, if AGESA update from 3008 to 3502 made any differnce.
With 6001 I get constant BSOD while surfing or working. Its anoying =(

If Ryzen2 will become better... realy better, I may switch to the new one. Maybe 😉


I switched back to 3008 because of the voltage issue.
Unfortunately my Dominator Platinum wont run @ 3333Mhz again.
3200 are working with "usable" timings.

I hope, the official version of the Bios 6001 will work proper, so I can use it without watching temps and voltages all the time.


Test BIOS 0001 with AGESA for C6H, official beta will follow if no major issues are found (including C6HWIFI/C6E).

SHA256 4d22d089971b385a5356751d0bb5600b07c631b38420325dcd 5b8b50ed8b5742

- Sleep/resume timer issues when overclocking fixed
- OS frequency reporting when overclocking back to normal
- SIO sensor/fan fix not yet implemented
- HPET disable option in BIOS not yet implemented

FoxTech wrote:
I switched to 6001 yesterday, because I got new Memory. (Corsair Dominator Platinum 3466Mhz)
They run at 3333Mhz with 16-17-17-17-35-51 Timings
3466Mhz not possible to boot. I tryed timings up to 21 *lol*

Why not get some samsung B-die memory like most G.skill/flare X sets, 8 Pack team group etc 3200 C14 pretty much guaranteed and probably capable of 3333 C14 or even 3466 C14 if your lucky.

That is how Ryzen fly's!

Level 7
Hello DJ!

Well, a good question, I did not.
I stick again with 6001 and Ram @ 3333. 3008 wasn't working properly for some unknown reason.
Hell, my PC is fast enough with cl16.
Maybe, if price gets more "friendly" for memory, I switch again.

But I have another question to the community.
My 12V, 5V and 3,3V wont reach those numbers. I switched the PSU but still 11,2v to 11,8V (Bios and HWMonitor)
Is this only a inaccuracy reading or a problem with the board?
I get BSOD's from time to time in idle or under load. OS is fresh, drivers are up to date and M.2 + SSD's nearly empty.

chears Fox

Level 9
Hi Fox,
I find that my 12V, 3.3V & 5V are usually just a little over, rather than under. Have you checked voltages from HWINFO? It should be more accurate.

DJ Bully wrote:
Hi Fox,
I find that my 12V, 3.3V & 5V are usually just a little over, rather than under. Have you checked voltages from HWINFO? It should be more accurate.

I switched the PSU. With the new bequiet P11 850, the voltages are a bit more stabel, but still under the line.
Now I get 11,904 Volts 3,292V and 4,960V


With 6001 I have cold boot issues every single restart.
Random BSOD also. Not that often like with my old PSU but its still a shaky system =/
For the Ram, I can set voltage to 1,4v but the system only put it up to 1,37.
The whole electricity-thingy is strange on my board.

Level 7
Yep, I checked it with HW Info + Bios

The Ryzen System of my wifey shows the voltage also a bit over than under.
Hmmm... Will check with a multi-meter

Level 9
Been struggeling around with ram for quite some time now. 55 weeks and 4 days to be exact 😛
With 6001 i managed to set ram to 3600 (max speed) with 1.42 Volt and manged to get a cold boot 😄 (yaaaay) but system was pretie unstable.... (booooh!!!!)
So i switched back to 3466 1.4volt and had some preformance isseus but nothin major!
Lately some stuiff started to work real bad, like internet browsing (loading web page could take 10 minutes) and other "normal tasks" like watching movies took a while to load or would not play right...
After some discussion with some friends (also are ryzen owners) i dongraded my ram to 3200 mhz 1.35volt and lower timings since then the system have never felt more stable then this ever before!
System boots up 3 seconds faster (12 seconds cold boot instead of 15) get 4 fps more in games on avarage, and i get 400 point more with 3d mark benchmark, copieing files now copie with the correct speed etc.. etc.. etc...
So i'm more then happy that my ryzen FINALY feels like worty upgrade! but i'm sad i spent to much money on my 3600mhz ram 😛

Level 9
Any word on a new bios, or will they wait for the new cpus?