10Gb Network Card X520-DA2-Intel PCI-E Ethernet Card NIC Dual SFP+ Port E10G42BTDA, Intel 82599EN Controller, 10G PCI Express LAN Adapter Support Windows Server/Windows, Linux, Vmware

Installed on Harvester OS. It even support SR-IOV, meaning I can pass-through each network interface to VM. Also, tested on Win10, had to download drivers manually from Intel website, works great.

Very Satisfied

Purchased the x520-da2 NIC card. Works well and able to set up VLANs.

This card works OK, but it's not stable on windows 11 pro, I would fix the drivers, and updates would break them. For windows 11, stay away.

Got this for my Proxmox machine; It works fine with a Windows 2019 VM but TrueNAS Scale and Ubuntu VMs not so much – they get a valid IP via dhcp but no network connectivity so I think there are issues with Linux drivers or kernel. I just ordered a SolarFlare SFN6122F which TrueNAS reports works (see TrueNAS resources: 10 Gig Networking Primer), if it does, then I’ll be returning this. ‘lspci -vvxnn’ below: Ethernet controller [0200]: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01) Subsystem: Beijing Sinead Technology Co., Ltd. 82599ES 10-Gigabit SFI/SFP+ Network Connection [1dcf:030a] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 16 IOMMU group: 5 Region 0: Memory at 84180000 (32-bit, non-prefetchable) [size=512K] Region 2: I/O ports at 3020 [size=32] Region 3: Memory at 84204000 (32-bit, non-prefetchable) [size=16K] Expansion ROM at 84100000 [disabled] [size=512K] Capabilities: [40] Power Management version 3 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME- Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+ Address: 0000000000000000 Data: 0000 Masking: 00000000 Pending: 00000000 Capabilities: [70] MSI-X: Enable+ Count=64 Masked- Vector table: BAR=3 offset=00000000 PBA: BAR=3 offset=00002000 Capabilities: [a0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0W DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+ RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset- MaxPayload 256 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr- TransPend- LnkCap: Port #0, Speed 5GT/s, Width x8, ASPM L0s, Exit Latency L0s unlimited ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp- LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 5GT/s, Width x4 (downgraded) TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR- 10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix- EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit- FRS- TPHComp- ExtTPHComp- AtomicOpsCap: 32bit- 64bit- 128bitCAS- DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- 10BitTagReq- OBFF Disabled, AtomicOpsCtl: ReqEn- LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1- EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest- Retimer- 2Retimers- CrosslinkRes: unsupported Capabilities: [e0] Vital Product Data Unknown small resource type 06, will not decode more. Capabilities: [100 v1] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+ CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+ AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn- MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap- HeaderLog: 00000000 00000000 00000000 00000000 Capabilities: [140 v1] Device Serial Number xxxxxxxxxxx Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI) ARICap: MFVC- ACS-, Next Function: 1 ARICtl: MFVC- ACS-, Function Group: 0 Capabilities: [160 v1] Single Root I/O Virtualization (SR-IOV) IOVCap: Migration- 10BitTagReq- Interrupt Message Number: 000 IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy+ 10BitTagReq- IOVSta: Migration- Initial VFs: 64, Total VFs: 64, Number of VFs: 0, Function Dependency Link: 00 VF offset: 128, stride: 2, Device ID: 10ed Supported Page Size: 00000553, System Page Size: 00000001 Region 0: Memory at 00000060e0300000 (64-bit, prefetchable) Region 3: Memory at 00000060e0200000 (64-bit, prefetchable) VF Migration: offset: 00000000, BIR: 0 Kernel driver in use: ixgbe Kernel modules: ixgbe

this is an intel 82599 based card with extra chinese goodness baked into the board. xi jinping would be proud, and so are we to rock these in our basement servers.

Installed in an i9900k build. Was plug and play. Super fast. Easy link aggregation.

The X520-DA2 chip is old and extremely common. It came out in 2009. If you're smart you can look around and find many options that are 1/4 this cost.