pcie lans quesion

[abdo601]

i will buy asus b250f strix 
it has tow M.2 ports (all told me b250 boards can support only 1 M.2 but i dont know how thi board has 2 ports)
so if i used both of them, will that make GPU gets only 8 pcie lans or still gets 16?

[Lurick]

It depends on how the board is wired but from the looks of it one takes PCIe lanes from the CPU and the other uses SATA so it will disable some SATA ports and use that.

Even if your GPU runs at x8 mode it won't impact performance so you're good either way.

[NumLock21]

For a B250 motherboard. All 16 lanes from your CPU is used up by the 1st x16 slot. Rest of the board that needs pcie lanes, takes it from the chipset. Intel B250 has 12 pcie lanes. This gives you a combined total of 28 pcie lanes.

[abdo601]

thanks

[abdo601]

http://prntscr.com/fw31y7
 

more people told me i cant install only one m.2 on a B250 board

but why asus B250 has tow M.2 ports? https://prnt.sc/fw0ru8

[mathijs727]

41 minutes ago, abdo601 said:

http://prntscr.com/fw31y7
 

more people told me i cant install only one m.2 on a B250 board

but why asus B250 has tow M.2 ports? https://prnt.sc/fw0ru8

According to the specsheet, one m2 port is connected to 4 PCIe 3 lanes while the second port is SATA only.

 

Source:

https://www.asus.com/Motherboards/ROG-STRIX-B250F-GAMING/specifications/

[abdo601]

the sata one is the same speed as the  4 pcie 3 or slower?