3900x under performance

[RichardCharlesD]

Upgraded my builds mobo and process to the ryzen 9 3900x + crosshair viii hero
Did a benchmark test and my ryzen is extremely under performing , see here: https://www.userbenchmark.com/UserRun/20826813
100 PCs with exactly the same components, 64 performed better.

I put it in performance mode in au suite, temps were not going over 45, idle 35, average 40

any insight?

[RedSector73]

Look like your running default speed (Your running your 32GB DIMM DDR4 clocked @ 2133 MHz) - this will be likely source of issue. You need to use the DOCP profile for your RAM which I hope is somewhere between DDR4 3200 to 3600 which is best place to be for Ryzen 3 series.

Then re-test, post and see whats happening.

[RichardCharlesD]

RedSector73 wrote:
Look like your running default speed (Your running your 32GB DIMM DDR4 clocked @ 2133 MHz) - this will be likely source of issue. You need to use the DOCP profile for your RAM which I hope is somewhere between DDR4 3200 to 3600 which is best place to be for Ryzen 3 series.

Then re-test, post and see whats happening.

Actually got worse 😕 https://www.userbenchmark.com/UserRun/20828768 - 46.1% Above Average vs previous 54.2% Above average

[RedSector73]

What are you doing in regards to cpu in the setup and are you using the latest bios 1001 ?

I see an improvement but CPU is down-clocking massively and need to work out why.

[RichardCharlesD]

Yes i am using latest bios with all drivers updated from asus/amd
What exact settings would you want to see, see here from ai suite: https://www.screencast.com/t/w90kNxWw1uvO , https://www.screencast.com/t/GUGU8ojmJF

also not sure if this has anything to do with it, but i only connected the 8pin EATX12v_1 and not the 4pin EATX12v_2 ( my Corsair HX750i didnt come with a 4pin wire, unless i didnt look properly)

[RedSector73]

It appears to have them
https://www.anandtech.com/show/8835/corsair-hx750i-power-supply-review

specifically, bottom left first two cables, 2 marked CPU - they look like 8's but one might be 4+4 or they both might be.
https://images.anandtech.com/doci/8835/HX750i_03.JPG