Question swapping HP ellitebook 850 G1 mobo with 840 G2 mobo

[Fantastical]

Hello guys
i have old laptop with dead mobo and decide to get it back to life and was searching motherboard for it
mine is Elitebook 850 G1 4th series i5 and during search on ebay i came to 840 G2 mobo with 5tth series i5, main reason is price, for newer version price is lower
but there is 2 difference i noted on the mobos
one is wifi adapter is different, i think only difference is mounting point and another on m.2 ssd slot mounting point again different, but both laptop`s on HP website says m.2 2242 version (size).
all othe mounting point and visual part all the connectors are located in same place on both mobo.
so what do you think? will 840 G2 mobo works on 850 G1 laptop? wifi i will use old version i already have and just fix it someway without screws.

Picture front side

850 G1 - 730803-001

840 G2 - 799510-001

Picture back side

850 G1 - 730803-001

840 G2 - 799510-001

 

[helpstar]

the wifi module has a different slot on the picture
850G1 is MINI PCIe and the 840G2 is M.2
there are adapters, but not sure if these would fit. Better get a M.2 wifi/BT module (about $5-$10)

 

[Fantastical]

the wifi module ha a different slot on the picture

slot itself seems to be same size, was thinking to flip the module i already have,

850G1 is MINI PCIe and the 840G2 is M.2

thats actually not a problem, i have to buy ssd anyway

i`m just confused if it will works with keyboard touchpad screen charger etc...

 

[helpstar]

I´m not referring to the SSD, only to the wifi module which will not fit into the slot. Not only the screw holes are different, but the connection as well

Guide to Mini PCIe - Everything you need to know

Mini PCIe has been largely replaced by the M.2 and NVMe standard, but still finds application in some smaller devices. Here's everything you need to know about Mini PCIe.

www.cgdirector.com

edit:
display should work, both have 30pin eDP slots

you will have to find out yourself, could fit, but still different laptops

 

[Fantastical]

I´m not referring to the SSD, only to the wifi module which will not fit into the slot. Not only the screw holes are different, but the connection as well

didnot knew those connectors also have names m.2 and pcie and though its about ssd 😀
thanks for info

display should work, both have 30pin eDP slots

you will have to find out yourself, could fit, but still different laptops

it gets all very complicated...
seems it is better to pay a bit more and buy the mobo specifically for this model.
thanks for helping me making decision.

 

[Fantastical]

I´m not referring to the SSD, only to the wifi module which will not fit into the slot. Not only the screw holes are different, but the connection as well

Guide to Mini PCIe - Everything you need to know

Mini PCIe has been largely replaced by the M.2 and NVMe standard, but still finds application in some smaller devices. Here's everything you need to know about Mini PCIe.

www.cgdirector.com

edit:
display should work, both have 30pin eDP slots

you will have to find out yourself, could fit, but still different laptops

Hey, can you help me with ssd?
you see 850 G1 m.2 slot in the picture above.
but when i search ssd itself there 2 types of it and do both works on this or only the version 1? (bellow picture)

version 1 - connector like on motherboard

version 2

 

[helpstar]

The Samsung PM991 is
M.2/M-Key (PCIe 3.0 x4)

The WesternDigital SN520 is
M.2/B-M-Key (PCIe 3.0 x2)

both will fit to the boards

edit:

if you find one more model type with only B-key, this wouldn´t fit, cause it´s only a SATA M.2
some offer B+M key as well but are only SATA as well.

M.2 M-key or M.2 B+M-key NVME/PCIe is the only thing you should be looking for

 

[Fantastical]

The Samsung PM991 is
M.2/M-Key (PCIe 3.0 x4)

The WesternDigital SN520 is
M.2/B-M-Key (PCIe 3.0 x2)

both will fit to the boards

Thank you very much 👍

 

[Fantastical]

if you find one more model type with only B-key, this wouldn´t fit, cause it´s only a SATA M.2
some offer B+M key as well but are only SATA as well.

M.2 M-key or M.2 B+M-key NVME/PCIe is the only thing you should be looking for

ya googled it now and understood, i need one with 5 pins on 1 side, if have 1 side only 6 pins it not fits, thank you

 

[Fantastical]

some offer B+M key as well but are only SATA as well.

so only M key is better then B+M as i understand

 

[helpstar]

usually yes