New cpu, same socket..

[ToplevelScrublet]

Hello, i just got my new cpu, but i was woundering i need to do a fresh windows if i use the same socket from the cpu or not?

Also got a corrupt bios so that had to be updated. 

New cpu, same socket,  same mobo. 

[YoungBlade]

What is the socket? And do you know the specific model of board?

 

Some sockets are the same, but have different compatability. For example, LGA1151 boards only officially support either 6th and 7th gen CPUs or 8th and 9th gen, but not all 4 on the same board.

[ToplevelScrublet]

Socket AM 5 
 Mobo : MSI MAG B650 TOMAHAWK WIFI

Old : AMD Ryzen 9 7900X
New : AMD Ryzen 9 9950X3D

 

[Needfuldoer]

You should not have to reinstall Windows just for a CPU swap. 

[YoungBlade]

7 minutes ago, ToplevelScrublet said:

Socket AM 5 
 Mobo : MSI MAG B650 TOMAHAWK WIFI

Old : AMD Ryzen 9 7900X
New : AMD Ryzen 9 9950X3D

 

The board supports BIOS flashback, so you can use that to install the latest BIOS, which should address both the corruption and get you on a BIOS that definitely supports the new CPU.

[ToplevelScrublet]

Thanks !

[ToplevelScrublet]

I did that, but swapping parts seems to mess systems up so, just wanted to check, with someone that is better then me, with this kinde of things.

[OddOod]

49 minutes ago, ToplevelScrublet said:

I did that, but swapping parts seems to mess systems up so, just wanted to check, with someone that is better then me, with this kinde of things.

Not unreasonable, but in this case you should be fine

[ToplevelScrublet]

Thanks.. Forgot to add that my bios got corupted when i put inn the new cpu as well, so it kinda forced my hand, on that point..
But also thanks for all of the reponeses  

[Ebony Falcon]

Ur bios got currupted x2 ???

[ToplevelScrublet]

Sorry no, just a recap, but planing on doing a new windows this week eather way, but the looks of things, not all the cores or theards are inn use.. 

 

[OddOod]

55 minutes ago, ToplevelScrublet said:

Sorry no, just a recap, but planing on doing a new windows this week eather way, but the looks of things, not all the cores or theards are inn use.. 

 

Wait, that's a pretty big problem. Are you sure you have a genuine 9950x3d and none of the cores are parked?

[Ebony Falcon]

U don’t have that ms co fig boot threads thing ticked so you ? 

[ToplevelScrublet]

On 9/24/2025 at 8:13 PM, OddOod said:

Wait, that's a pretty big problem. Are you sure you have a genuine 9950x3d and none of the cores are parked?

Got it from a store with reputasion inn the contry where i live.. so if something is wrong its not that its a fake one, i might as well be mobo messing up or something 
CHecked bios.. Expo one is on, but inn AMD master, it states that is off
Also got some codes now on event manger / viwer  
{2593F8B9-4EAF-457C-B68A-50F6B8EA6B54} ( googled it, and it seems someone or something is not getting the promisson that is need to run, when i played game the game just crashed could play for a houer or 30, or when i booted up the game, game crashes..) 
So i was thinking of maybe just try a new fresh install, and hope it helps..
cores are parked?
By the looks of things that would not supprice me, but too be honest i do not know for sure... but this hope i hope so, got it for hopefully get some frames, but now just been probloms.

[ToplevelScrublet]

Cores parked, soo by the the look of things everything stands on auto, all of the cores so dont think the cores are parked

Also manged to enable 3D game mode in bios as well.. 

[ToplevelScrublet]

OKey i just did a fresh innstal of the OS W10 
Fresh bios update

Clean all off the ssd

So with that said, i hope everything is as it should be for now..

[freeagent]

You should reinstall windows when going from a single CCD to a dual CCD part.

 

I see you have already done that, but for other newer people who happen to see this thread.

 

AM4, AM5.. doesn't matter. Fresh install going from single to dual CCD parts.

[OddOod]

On 10/5/2025 at 7:42 AM, freeagent said:

You should reinstall windows when going from a single CCD to a dual CCD part.

I see you have already done that, but for other newer people who happen to see this thread.

AM4, AM5.. doesn't matter. Fresh install going from single to dual CCD parts.

TBH, I advise a reinstall when upgrading anything aside from RAM or GPU, but I'm always about long term stability. So curious why you're adamant about this specific change. Is there some microcode/driver reason?

[freeagent]

3 hours ago, OddOod said:

Is there some microcode/driver reason?

Yes, windows will not assign cores properly, sometimes even with a chipset driver update. Unless they fixed it.. but AMD recommended it too at one point.