Looking for M2 ssd advice on a ROG Maximus Z790 Dark Hero

[Slyme]

I was looking for advice from you good people on the internet.

I have recently purchased a
ROG Maximus Z790 Dark Hero 
ROG Strix 4080 Super OC 
Samsung 990 Pro M.2 4TB
I have a pre existing Samsung 970 Evo 1TB as a boot drive in my current system.
 
I was wondering which configuration I should use for my M.2's on my new motherboard.
M.2_1 is the PCI -5 which I will not be using.
M.2_2 is directly from the CPU but is right under where my GFX will be. Will it be ok to mount the 990 in that position? 
M.2_3 I will mount my old 970 Evo. Is it worth cloning my system onto the 990 from the 970? (7,450/6,900 MB/s v 3,500/2,500 MB/s theoretical). I might just end up reinstalling anyways but if I choose not too. 

Any advice will be greatly appreciated.

[pwbc · Accepted solution]

I have a similar setup, with a 980 Pro and a 980 SSD and a 3080 GPU. I found M2.1 and M2.2 would cause the SSD to run very hot  as they are masked by the GPU, so I am using M2.3 and M2.4. I would put the 990 in M2.3 and 970 in M2.4 and clone tie OS from the  970 to the 990. Use Samsung Migration it works very well.

Hope that helps

[Slyme]

Sorry it took so long to reply Life took over. 
Many thanks for the info. I might change my setup at som epoint. I had already installed it all before you replied.

So basically,  I put the 990 pro in socket 2 and the 970 evo in socket 3 . both running about 55 under crystal disk mark and it has been relatively warm in the UK where I am 32-33°C so I don't think that is bad. 
I never bothered reinstalling but I did move my entire steam directory from the EVO to the PRO just to clear some space. 

Anyways thanks again and Kudo's left for you 🙂 

[pwbc]

Glad to be of help. I have upgraded my case to a Corsair 7000 RGB and my cooler to a Corsair to a H170i. The M2 SSDs' temps are now around 40 degrees, that with Samsung Magician.

Keep in touch