MP 1,1-5,1 Mac Pro 4,1 to 5,1 logic board swap

[Trash_snusnu]

I have a Mac Pro 2009 4,1 flashes to 5,1 single CPU

I recently ordered a Mac Pro Dual CPU but the seller listed it as 4,1 when it was in fact a 5,1.. Soo I was going to send it back but after doing research and seeing the SMC is not compatible.. but then during my search I found a few 5,1 (2010-2012) logic boards on eBay for $99-$150 and for me, that’s stupid cheap and reasonable,
so question is:

I have a 4,1 shell(case) and a 5,1 dual cpu tray.. would there be any reason as to why I couldn’t disassemble the Mac 4,1 remove the 2009 logic board and replace it with the 2012 logic Board ? all the macs from 2009-2012 seem to be the same A1289 model and all the same parts?
I can’t seem to find any answers to this, I see soooo many posts about “you cannot put 5,1 tray in 4,1 LB as the SMC is different” and vis versa but I have not seen anyone Comment on both a logic board and tray swap.

I paid $190 for this Mac Pro 4,1 and I already have a vast majority of parts from a previous build (a few years ago)
I paid $500 for the dual CPU tray with 64GB ram, so another $167 for a logic board to make it all a real 5,1 doesn’t really bug me or hurt my wallet.
Thanks for the input

 

[natjonesart]

As long as tray and board match(SMC) everything else is interchangeable.

 

[Macschrauber]

you can use a 5.1 backplane in a 4.1 case. As said SMC must match, Power Supply, Front Board etc match.

Refer to the Apple service manual for removing the CPU cage.

Moving the Fans inside to get the cage off is a little bit tricky if you dont know the details.

Secure the CPU Board Plug.

If you want to add a Airport Module do it when the CPU Cage is still out. It's way easier to fiddle with the small antenna cables.

 

[Trash_snusnu]

you can use a 5.1 backplane in a 4.1 case. As said SMC must match, Power Supply, Front Board etc match.

Refer to the Apple service manual for removing the CPU cage.

Moving the Fans inside to get the cage off is a little bit tricky if you dont know the details.

Secure the CPU Board Plug.

If you want to add a Airport Module do it when the CPU Cage is still out. It's way easier to fiddle with the small antenna cables.

Thanks for the info, but you raised a new question I read that the power supply and fans etc are all identical and the only issue is the LB and CPU Tray those need to Match? Nothing about power

 

[Macschrauber]

Psu are identical. If have the chance to get or swap one the Delta branded are much better and more reliable.

i have seen swollen capacitors in Acbell.

 

[Trash_snusnu]

Psu are identical. If have the chance to get or swap one the Delta branded are much better and more reliable.

i have seen swollen capacitors in Acbell.

Yea I have a delta with pixlas mod.