2x BUILD for ESXi v5.1 HOST:
CASE = LIAN LI PC-P80
BOARD = EVGA SRX
CPU = 2x Xeon E5-2665  [ BIOS detected OK ]
RAM = 192 GB DDR3-1600 REG ECC CENTURY  [ BIOS detected OK ]
NIC.1 = Myricom 10G-PCIE2-8B2-2S Dual 10GBE x8 on PCIE Slot #1 [not installed yet]
NIC.2 = Intel X540-T2 Dual 10GBE x8 on PCIE Slot #2 [ BIOS detected OK ]
NIC.3 = Intel i350-T2 Dual 1GBE x4 on PCIE Slot #3 [ BIOS detected OK ]
NIC.4 = Intel i350-T2 Dual 1GBE x4 on PCIE Slot #4 [ BIOS detected OK ]
NIC.5 = Intel i350-T4 Quad 1GBE x4 on PCIE Slot #6 [ BIOS not always  detected ]
GPU = NVIDIA GT610 Fanless x16 on PCIE Slot #7 [ BIOS detected OK ] 
 
BIOS IOH Bifurcation are as follow :
 
IOH 0 PCIe port Bifurcation Control
IOU1 - PCIe Port [x8]
PORT 1A Link Speed [GEN2]
IOU2 - PCIe Port [x8x8]
PORT 2A Link Speed [GEN2]
PORT 2C Link Speed [GEN2]
IOU3 - PCIe Port [x8x8]
PORT 3A Link Speed [GEN2]
PORT 3C Link Speed [GEN2]
 
 
IOH 1 PCIe port Bifurcation Control
IOU1 - PCIe Port [x8]
PORT 1A Link Speed [GEN2]
IOU2 - PCIe Port [x8x8]
PORT 2A Link Speed [GEN2]
PORT 2C Link Speed [GEN2]
IOU3 - PCIe Port [x8x8]
PORT 3A Link Speed [GEN2]
PORT 3C Link Speed [GEN2]
 
Can someone explain in clear what is the mapping between IOH bifurcation and Physical PCIe Slot ?!!

thanks for the info so it should be
LIKE THIS
PCIE Slot #1 = IOH 0 - IOU2 - Port 1A [x8]
PCIE Slot #2 = IOH 0 - IOU2 - Port 1C [x8]
 
AND THIS ?
PCIE Slot #3 = IOH 0 - IOU3 - Port 3A [x16]
PCIE Slot #4 = IOH 0 - IOU3 - Port 3A [x16]
PCIE Slot #5 = IOH 0 - IOU3 - Port 3A [x16]
PCIE Slot #6 = IOH 0 - IOU3 - Port 3A [x16]
PCIE Slot #7 = IOH 0 - IOU3 - Port 3A [x16]
 
HOW a single X16 via PLX can accomodate 5 Slots ?
And where does IOH 1 come into play?

OK i found the culprit:
PCIE Slot #6 = IOH 0 - IOU1 - Port 1A [x4]
 
But the 2 SAS port are also connected to Root Port 1a !!!
disabling the Storage OPROM & SAS OPROM in the BIOS did the trick
 
thank you.

Actually after numerous reboot for vmnic ordering
i found out that disabling the 2 OPROM in the bios mentioned in my previous post DOES NOT disable the Patsburg 4 Port SAS everytime!!!
 
anyone knows how to disable it so the PCIE Slot #6 is free for my Quad NIC card ?

Valentes

Hello,
I installed a USB 3.0 pci 4x expansion card on slot 7. What should I do?
At the moment I am not recognized.

I don't think this issue is related to your problem so you would have better off to make a new post rather than add to a thread that is well over 6 years old. 
 
In regards to your problem is that the very last slot on the motherboard? If not then try the last slot.