Crosshair VIII 2501's for testing

[Spook161]

Hi bud,
Have you tried using DRAM Calculator? I mean also setting the PSU Section values.

Baio

I can say that I have tried the "Safe" calculator settings... 14-15-15-15-30.... with my 3600 B-die, at 3600/1800 2x16Gb Neo kit, and the system wouldn't boot.

[steverebo]

I had to lower my infinity fabric freqency to stabilize my system. I'm 2 days now without a random reboot. Was using 3800/1900, and took it down to 3600/1800 to stabilize the system. I've seen some are reporting that they have to take it down to 3200/1600. Just take it down and stabilize your system for now, and hope they get a newer bios out that we can get our IF Clocks higher again. At least that is my approach.

Really frustrating that I have to lower my fclock as I purchased my 4x8gb 3600 c16 kit so I could run 1 to 1 without any overclocking

[Spook161]

I'm really hoping they get it worked out... Just odd that on the same hardware minus the Zen3 chip, that I could get 3800/1900 all day long on my 3900x, considering they are supposed to have the same IMC... But hopefully they will work this out soon.

[DrSlump76]

I can say that I have tried the "Safe" calculator settings... 14-15-15-15-30.... with my 3600 B-die, at 3600/1800 2x16Gb Neo kit, and the system wouldn't boot.

I've tried all workarounds, dram calculator inlcuded, with no improvment in system stability. The only way to gain stability is to revert to 2206 or earlier bios.
In my opinion is not normal that a system that was stable with all bioses relase becomes unstable with new bioses relase at a certain point... something is not working well and is not my "not qvl" dram kit fault. Well that's my opinion.

[Baio73]

I can say that I have tried the "Safe" calculator settings... 14-15-15-15-30.... with my 3600 B-die, at 3600/1800 2x16Gb Neo kit, and the system wouldn't boot.

It sounds strange to me that "safe" settings can give 14-15-15-15-30 results at 3600... are you sure you set all the variables correctly?
Start with A0 first.

Baio

[Spook161]

It sounds strange to me that "safe" settings can give 14-15-15-15-30 results at 3600... are you sure you set all the variables correctly?
Start with A0 first.

Baio

I haven't USED the 14-15-15-15-30 before, because I was able to get 16-16-16-16-32 with 3800, and left it at that. But now that isn't working, I thought to optimize what my 3600 would do. Spec is 16-16-16-16-32 Neo Bdie, so cranked the calculator back for 3600, which told me I should be able to do 14-15-15-15@3600. Same numbers, I have them printed out here, since I've had to reset my bios so often, I keep them handy. pulled the base numbers from Thaiphoon, and calculated them into the Ryzen DRAM Calculator. It just hasn't been updated for Zen3 yet.

[jnormen]

Not sure if it's the 2701 bios version or something else.
But after installing a water block and turn on games the browsers get slow while scrolling.
I can't see any drop of CPU Mhz or GPU Mhz... but it feels odd that a 16 core (AMD 5950x) and Strix 3090 can't handle a game and browsning at the same time without any notice?

Not sure if it's the bios? or something else.
Temp:
480 (3 fan radiator)
Loop (GPU -> CPU -> radiator -> Pump -> ...)

idle temp:
GPU 37c
CPU (PBO on) 49-54 c

In game: (eg World of warcraft)
GPU: 66 c (max mostly around 61-62c)
CPU: 67-77 c

Coil vain is here and a clicking sound when turn of games.

[Jackalito]

Just wanted to share that it's been a happy and uneventful ride with my new Ryzen 7 5800X on Crosshair VIII Hero using BIOS 2701 so far.
CPU is running stock with PBO.

For memory: 2x8GB Sammy-B die 3600C15 from G.Skill running at 3600/1800. Will go for higher frequencies once AMD releases a future AGESA revision that allows to reach 1900+ fabric clocks more easily, and hopefully with less voltage.

Thanks for sharing these betas with the community, @shamino

[Sprayingmango]

I'm running a Crosshair VIII Formula with 32 GB of G-Skill 3600 MHz and a 5950X and EVGA FTW3 Ultra 3080. Bios 2701 has been fantastic so far.

[mdzcpa]

Just wanted to share that it's been a happy and uneventful ride with my new Ryzen 7 5800X on Crosshair VIII Hero using BIOS 2701 so far.
CPU is running stock with PBO.

For memory: 2x8GB Sammy-B die 3600C15 from G.Skill running at 3600/1800. Will go for higher frequencies once AMD releases a future AGESA revision that allows to reach 1900+ fabric clocks more easily, and hopefully with less voltage.

I'm running a Crosshair VIII Formula with 32 GB of G-Skill 3600 MHz and a 5950X and EVGA FTW3 Ultra 3080. Bios 2701 has been fantastic so far.

These posts give me great hope that the new Zen3/570 platform just needs a bit of tweaking. Thanks for sharing the positive results!
Shamino and the team will get this sorted soon.