What is the difference between E10G42BTDA and E10G42BTDABLK? Which of these adapters is identified on the adapter as Intel OEM Ethernet Server Adapter (designation on the adapter is E10G42BTDA)?
This information is important because an adapter with the same product identifier but as Intel ETH Converged Adapter does not accept all DAC cables and SFP+ modules. (The designation on the adapter is E10G42BTDABLK).

So which order number is used to order an Intel OEM Ethernet Server Adapter?

Question

What is the difference between E10G42BTDA and E10G42BTDABLK? Which of these adapters is identified on the adapter as Intel OEM Ethernet Server Adapter (designation on the adapter is E10G42BTDA)? 
This information is important because an adapter with the same product identifier but as Intel ETH Converged Adapter does not accept all DAC cables and SFP+ modules. (The designation on the adapter is E10G42BTDABLK).

So which order number is used to order an Intel OEM Ethernet Server Adapter?

Answer

Bei meinem Intel E10G42BTDA steht "Intel OEM ethernet server adapter" auf dem Aufkleber drauf. Unter Linux wird der Adapter wie folgt erkannt:

02:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
	Subsystem: Intel Corporation Ethernet Server Adapter X520-2
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
	Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
	Capabilities: [a0] Express Endpoint, MSI 00
	Capabilities: [e0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-c0-51-6c
	Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
	Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
	Kernel driver in use: ixgbe
	Kernel modules: ixgbe

02:00.1 Ethernet controller: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01)
	Subsystem: Intel Corporation Ethernet Server Adapter X520-2
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
	Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
	Capabilities: [a0] Express Endpoint, MSI 00
	Capabilities: [e0] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-c0-51-6c
	Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
	Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
	Kernel driver in use: ixgbe
	Kernel modules: ixgbe

Hope this helps

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