It's an Megarends mb. That and this is what speccy also says:Motherboard
Manufacturer INTEL
Model B75 (SOCKET 0)
Version V124
Chipset Vendor Intel
Chipset Model Sandy Bridge
Chipset Revision 09
Southbridge Vendor Intel
Southbridge Model Q77
Southbridge Revision 04
BIOS
Brand American Megatrends Inc.
Version 4.6.5
Date 3/25/2019
PCI Data
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x16
Slot Designation J6B2
Characteristics 3.3V, Shared, PME
Slot Number 0
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x1
Slot Designation J6B1
Characteristics 3.3V, Shared, PME
Slot Number 1
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x1
Slot Designation J6D1
Characteristics 3.3V, Shared, PME
Slot Number 2
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x1
Slot Designation J7B1
Characteristics 3.3V, Shared, PME
Slot Number 3
Slot PCI-E
Slot Type PCI-E
Slot Usage In Use
Data lanes x1
Slot Designation J8B4
Characteristics 3.3V, Shared, PME
Slot Number 4