# WinOF Driver **URL:** https://forums.developer.nvidia.com/c/infrastructure/software-and-drivers/winof-driver/533.md [Latest](https://forums.developer.nvidia.com/latest.md) · [Categories](https://forums.developer.nvidia.com/categories.md) · [Tags](https://forums.developer.nvidia.com/tags.md) --- ## [WinOF-2 bug: NetworkDirect Accept fails with STATUS\_INVALID\_PARAMETER when the peer requests more than 16 responder resources](https://forums.developer.nvidia.com/t/winof-2-bug-networkdirect-accept-fails-with-status-invalid-parameter-when-the-peer-requests-more-than-16-responder-resources/386332)
**Author:** [@krzys95](https://forums.developer.nvidia.com/u/krzys95)\ **Replies:** 0\ **Last updated:** [October 19, 2026, 5:57pm UTC](https://forums.developer.nvidia.com/t/winof-2-bug-networkdirect-accept-fails-with-status-invalid-parameter-when-the-peer-requests-more-than-16-responder-resources/386332 "2026-10-19T17:57:46Z")
Environment Passive side (fails): Windows 11 Pro 10.0.26200, ConnectX-4 Lx, firmware 14.32.2004 (PSID DEL2420110034), WinOF-2 26.7.27199. Also seen with 26.4.27095. RoCE v2. Active side: Linux, Intel E810-XXV (irdma), … --- ## [RFE/Bug: WinOF-2 mlx5 delay\_drop lacks Linux-equivalent dropless\_rq auto rearm for DPDK Rx no-drop use case](https://forums.developer.nvidia.com/t/rfe-bug-winof-2-mlx5-delay-drop-lacks-linux-equivalent-dropless-rq-auto-rearm-for-dpdk-rx-no-drop-use-case/371651)
**Author:** [@becauseof86](https://forums.developer.nvidia.com/u/becauseof86)\ **Replies:** 1\ **Last updated:** [June 15, 2026, 6:50am UTC](https://forums.developer.nvidia.com/t/rfe-bug-winof-2-mlx5-delay-drop-lacks-linux-equivalent-dropless-rq-auto-rearm-for-dpdk-rx-no-drop-use-case/371651 "2026-06-15T06:50:55Z")
Product: NVIDIA/Mellanox ConnectX-5, WinOF-2, DPDK mlx5 PMD on Windows Request type: RFE / driver feature parity with Linux MLNX\_OFED dropless\_rq We need WinOF-2 to support Linux-equivalent dropless\_rq auto rearm for R… --- ## [Need to silently download, extract and install specific NVIDIA Driver version. The extraction is not being done in the requested directory](https://forums.developer.nvidia.com/t/need-to-silently-download-extract-and-install-specific-nvidia-driver-version-the-extraction-is-not-being-done-in-the-requested-directory/360972)
**Author:** [@mfontaine\_aero](https://forums.developer.nvidia.com/u/mfontaine_aero)\ **Replies:** 0\ **Last updated:** [February 18, 2026, 4:39pm UTC](https://forums.developer.nvidia.com/t/need-to-silently-download-extract-and-install-specific-nvidia-driver-version-the-extraction-is-not-being-done-in-the-requested-directory/360972 "2026-02-18T16:39:51Z")
\<# .SYNOPSIS Validates and enforces NVIDIA GPU driver compliance for Siemens NX based on the official Siemens NX certification matrix. .DESCRIPTION This script detects: Siemens NX installed version Computer model A… --- ## [DCBX/LLDP Configuration Issue on Mellanox ConnectX-5 for Azure Local Deployment](https://forums.developer.nvidia.com/t/dcbx-lldp-configuration-issue-on-mellanox-connectx-5-for-azure-local-deployment/356191)
**Author:** [@eilermanb](https://forums.developer.nvidia.com/u/eilermanb)\ **Replies:** 2\ **Last updated:** [January 20, 2026, 7:26am UTC](https://forums.developer.nvidia.com/t/dcbx-lldp-configuration-issue-on-mellanox-connectx-5-for-azure-local-deployment/356191 "2026-01-20T07:26:44Z")
We are configuring Mellanox ConnectX-5 EN adapters (MCX512A-ACU\_Ax\_Bx, device ID mt4119) for Azure Local RDMA compliance. The goal is to enable LLDP and IEEE DCBX negotiation for PFC/ETS using Mellanox firmware and Windo… --- ## [Mlx4eth63.sys crashes with BSOD on AlderLake-CPU system](https://forums.developer.nvidia.com/t/mlx4eth63-sys-crashes-with-bsod-on-alderlake-cpu-system/285974)
**Author:** [@DROZD02](https://forums.developer.nvidia.com/u/DROZD02)\ **Replies:** 11\ **Last updated:** [December 11, 2025, 3:26pm UTC](https://forums.developer.nvidia.com/t/mlx4eth63-sys-crashes-with-bsod-on-alderlake-cpu-system/285974 "2025-12-11T15:26:13Z")
Got my hands down on 2 Mellanox ConnectX-3 MCX354A cards. One works fine in a EPYC7302 system running Windows Server 2019, but the second one BSODs the PC with i5 13600K running Windows 10 when i try to change Port Proto… --- ## [Testing DPDK with Mellanox (MLX) Driver on Windows 10](https://forums.developer.nvidia.com/t/testing-dpdk-with-mellanox-mlx-driver-on-windows-10/351314)
**Author:** [@thenveer.poolakkanni](https://forums.developer.nvidia.com/u/thenveer.poolakkanni)\ **Replies:** 1\ **Last updated:** [December 9, 2025, 2:07am UTC](https://forums.developer.nvidia.com/t/testing-dpdk-with-mellanox-mlx-driver-on-windows-10/351314 "2025-12-09T02:07:11Z")
Hi team, I’ve set up DPDK on Windows 10 following the official guide: https://doc.dpdk.org/guides-25.07/windows\_gsg/index.html The setup works fine, but I need to test DPDK with a Mellanox (MLX) driver. Could you plea… --- ## [Is Mellanox WinOF2 compliant with Kernel DMA Protection?](https://forums.developer.nvidia.com/t/is-mellanox-winof2-compliant-with-kernel-dma-protection/343816)
**Author:** [@khai-wern.lim](https://forums.developer.nvidia.com/u/khai-wern.lim)\ **Replies:** 1\ **Last updated:** [November 4, 2025, 8:53am UTC](https://forums.developer.nvidia.com/t/is-mellanox-winof2-compliant-with-kernel-dma-protection/343816 "2025-11-04T08:53:09Z")
As titled, is the Mellanox WinOF2 driver compliant with Microsoft’s kernel DMA protection policy? Kernel DMA Protection | Microsoft Learn --- ## [MT27710 Family ConnectX-4 Lx usually fails to start Error Code 10 WinOF2](https://forums.developer.nvidia.com/t/mt27710-family-connectx-4-lx-usually-fails-to-start-error-code-10-winof2/324693)
**Author:** [@nomnomnom](https://forums.developer.nvidia.com/u/nomnomnom)\ **Replies:** 4\ **Last updated:** [February 25, 2025, 1:00pm UTC](https://forums.developer.nvidia.com/t/mt27710-family-connectx-4-lx-usually-fails-to-start-error-code-10-winof2/324693 "2025-02-25T13:00:28Z")
Windows 10 22H2 : MT27710 fails to start with Error Code 10. Fails intermittently and workaround is to reboot until success. There are plenty of tools as part of the driver installation for WinOF2. Not familiar how to de… --- ## [Issues gdscheck -p - receiving: CUDA\_ERROR\_SYSTEM\_NOT\_READY](https://forums.developer.nvidia.com/t/issues-gdscheck-p-receiving-cuda-error-system-not-ready/321704)
**Author:** [@dave.siracusa](https://forums.developer.nvidia.com/u/dave.siracusa)\ **Replies:** 0\ **Last updated:** [January 28, 2025, 1:14pm UTC](https://forums.developer.nvidia.com/t/issues-gdscheck-p-receiving-cuda-error-system-not-ready/321704 "2025-01-28T13:14:31Z")
I followed: Install - PG-Strom Manual I’ve deployed to an AWS p4d.24xlarge, RHEL 9.4 rpm --query redhat-release redhat-release-9.4-0.5.el9.x86\_64 echo $(uname -r) 5.14.0-427.47.1.el9\_4.x86\_64 gcc --version gcc (GC… --- ## [Cannot install WinOf2 on Windows 11 - error 1603](https://forums.developer.nvidia.com/t/cannot-install-winof2-on-windows-11-error-1603/317430)
**Author:** [@green.beach9610](https://forums.developer.nvidia.com/u/green.beach9610)\ **Replies:** 4\ **Last updated:** [January 8, 2025, 5:48pm UTC](https://forums.developer.nvidia.com/t/cannot-install-winof2-on-windows-11-error-1603/317430 "2025-01-08T17:48:34Z")
When i try to install the WinOf2 driver on a windows 11 desktop, i get an error saying “The wizard was interrupted before MLNX\_WinOf2 could be completely installed”. The card has been updated to the latest firmware and w… --- ## [Error with Flint: Can not create SignatureManager!](https://forums.developer.nvidia.com/t/error-with-flint-can-not-create-signaturemanager/308200)
**Author:** [@francois.runavot](https://forums.developer.nvidia.com/u/francois.runavot)\ **Replies:** 3\ **Last updated:** [October 7, 2024, 4:29pm UTC](https://forums.developer.nvidia.com/t/error-with-flint-can-not-create-signaturemanager/308200 "2024-10-07T16:29:29Z")
Hello. I have an firmware error with an very old ConnextX-2 with “mst status” MST devices: mt26448\_pci\_cr0 mt26448\_pciconf0 flint -d mt26448\_pci\_cr0 query Failed to identify the device - Can not create SignatureMan… --- ## [Where can I find mlx5 headers for Windows?](https://forums.developer.nvidia.com/t/where-can-i-find-mlx5-headers-for-windows/301646)
**Author:** [@shrinivas.balulad](https://forums.developer.nvidia.com/u/shrinivas.balulad)\ **Replies:** 1\ **Last updated:** [August 6, 2024, 9:35am UTC](https://forums.developer.nvidia.com/t/where-can-i-find-mlx5-headers-for-windows/301646 "2024-08-06T09:35:32Z")
I am trying to build an application to capture on ConnectX on Windows using WinOF\_2. I have installed the MLNX\_WinOF2\_DevX\_SDK for Windows 10. I need mlx5 headers (like device.h and mlx5\_ifc.h) for Windows to build my s… --- ## [Mellanox ConnectX4 Lx Win2016 server: Got bad tsecr in tcp ack packet](https://forums.developer.nvidia.com/t/mellanox-connectx4-lx-win2016-server-got-bad-tsecr-in-tcp-ack-packet/289808)
**Author:** [@356730059](https://forums.developer.nvidia.com/u/356730059)\ **Replies:** 1\ **Last updated:** [July 4, 2024, 9:57am UTC](https://forums.developer.nvidia.com/t/mellanox-connectx4-lx-win2016-server-got-bad-tsecr-in-tcp-ack-packet/289808 "2024-07-04T09:57:51Z")
client: arm server: windows server 2016. Mellanox ConnectX-4 Lx Ether Adapter client send 1963 bytes to server in tcp connection and 1963 bytes are split into two tcp segments. seg1: 1448 bytes, seg2: 515 bytes. s… --- ## [Rivermax, window kernel bypass?](https://forums.developer.nvidia.com/t/rivermax-window-kernel-bypass/286958)
**Author:** [@ronald16](https://forums.developer.nvidia.com/u/ronald16)\ **Replies:** 1\ **Last updated:** [April 1, 2024, 4:43pm UTC](https://forums.developer.nvidia.com/t/rivermax-window-kernel-bypass/286958 "2024-04-01T16:43:43Z")
I would like to know rivermax can achieve Window’s kernel bypass? That’s mean with winof2 driver and rivermax, the packet receive from connectx nic can directly put to the host memory without going through window networ… --- ## [How to set up RoCE transmission between Linux and Windows?](https://forums.developer.nvidia.com/t/how-to-set-up-roce-transmission-between-linux-and-windows/277401)
**Author:** [@luw\_28](https://forums.developer.nvidia.com/u/luw_28)\ **Replies:** 1\ **Last updated:** [January 28, 2024, 8:44pm UTC](https://forums.developer.nvidia.com/t/how-to-set-up-roce-transmission-between-linux-and-windows/277401 "2024-01-28T20:44:46Z")
I have a Linux server and a Windows Server 2016 server, both equipped with Mellanox ConnectX-4 Lx 25Gbps network cards. The Linux and Windows servers are directly connected via optical fiber (without going through a swit… --- ## [Mellanox ConnectX4 Lx for Windows 11 -\> 3.10.52010-LTS or 23.10?](https://forums.developer.nvidia.com/t/mellanox-connectx4-lx-for-windows-11-3-10-52010-lts-or-23-10/274200)
**Author:** [@pixelwave](https://forums.developer.nvidia.com/u/pixelwave)\ **Replies:** 3\ **Last updated:** [November 28, 2023, 10:03am UTC](https://forums.developer.nvidia.com/t/mellanox-connectx4-lx-for-windows-11-3-10-52010-lts-or-23-10/274200 "2023-11-28T10:03:32Z")
I have a Mellanox ConnectX4 Lx and there are two potential drivers I can download both available for Windows 11. What is the difference between 3.10.52010-LTS and 23.10 branch? --- ## [Got error message "NdStartup failed, could not load provider" while running the MlxNdPerf](https://forums.developer.nvidia.com/t/got-error-message-ndstartup-failed-could-not-load-provider-while-running-the-mlxndperf/272782)
**Author:** [@jlan1](https://forums.developer.nvidia.com/u/jlan1)\ **Replies:** 2\ **Last updated:** [November 15, 2023, 1:41am UTC](https://forums.developer.nvidia.com/t/got-error-message-ndstartup-failed-could-not-load-provider-while-running-the-mlxndperf/272782 "2023-11-15T01:41:27Z")
I was trying to run the bandwidth test on CX7 by MlxNdPerf.exe the performance tool provide from winOF-2 driver under Windows 2022. Got an error message about “ERROR: NdStartup failed, Could not load provider, hr = 0xc00… --- ## [How to find and set the maximum some of parametrs for a NIC (ConnectX-5) with exaple?](https://forums.developer.nvidia.com/t/how-to-find-and-set-the-maximum-some-of-parametrs-for-a-nic-connectx-5-with-exaple/258154)
**Author:** [@1welder1](https://forums.developer.nvidia.com/u/1welder1)\ **Replies:** 4\ **Last updated:** [July 6, 2023, 7:05am UTC](https://forums.developer.nvidia.com/t/how-to-find-and-set-the-maximum-some-of-parametrs-for-a-nic-connectx-5-with-exaple/258154 "2023-07-06T07:05:22Z")
How to find and set the maximum some of parameters for a NIC (ConnectX-5) with example? How to get maximum throughput from 100 Gb Ethernet adapter change driver? queues\_rx queues\_tx rx\_max\_pkts tx\_send\_cnt queues\_r… --- ## [SoftRoCE on 1 or 2 Linux Ubuntu workstations without Mellanox NIC](https://forums.developer.nvidia.com/t/softroce-on-1-or-2-linux-ubuntu-workstations-without-mellanox-nic/253873)
**Author:** [@user58403](https://forums.developer.nvidia.com/u/user58403)\ **Replies:** 2\ **Last updated:** [May 19, 2023, 10:22pm UTC](https://forums.developer.nvidia.com/t/softroce-on-1-or-2-linux-ubuntu-workstations-without-mellanox-nic/253873 "2023-05-19T22:22:20Z")
I have been doing RDMA on 2 Windows workstation with 2 Mellanox ConnectX-6 NIC. The NIC card were temporarily on a short term loan to my colleagues due to business priority. While I am waiting. I would like to know if: … --- ## [RDMA latency stability and PCIE version recognize](https://forums.developer.nvidia.com/t/rdma-latency-stability-and-pcie-version-recognize/251349)
**Author:** [@Ramadevi](https://forums.developer.nvidia.com/u/Ramadevi)\ **Replies:** 1\ **Last updated:** [April 27, 2023, 10:26pm UTC](https://forums.developer.nvidia.com/t/rdma-latency-stability-and-pcie-version-recognize/251349 "2023-04-27T22:26:41Z")
We are testing the performance of RDMA using ConnectX-5 25G on windows 10 Enterprise. we test the NetworkDirectSPI write operation latency with data length of 1024Byte. ref: GitHub - microsoft/NetworkDirect: NetworkDir… --- ## [About NDI interface support in WinOF](https://forums.developer.nvidia.com/t/about-ndi-interface-support-in-winof/213769)
**Author:** [@johnpub](https://forums.developer.nvidia.com/u/johnpub)\ **Replies:** 2\ **Last updated:** [April 27, 2023, 10:04am UTC](https://forums.developer.nvidia.com/t/about-ndi-interface-support-in-winof/213769 "2023-04-27T10:04:32Z")
Hi, all. I’m working on Windows RDMA programming(suppose supporting both roce and infiniband), I see that from WinOF-2, only Microsoft’s Network Direct Interface is supported, I would like to ask a few related questio… --- ## [Mlx5muxtool - is LACP possible on windows?](https://forums.developer.nvidia.com/t/mlx5muxtool-is-lacp-possible-on-windows/232592)
**Author:** [@a.wolf](https://forums.developer.nvidia.com/u/a.wolf)\ **Replies:** 1\ **Last updated:** [November 27, 2022, 10:17am UTC](https://forums.developer.nvidia.com/t/mlx5muxtool-is-lacp-possible-on-windows/232592 "2022-11-27T10:17:00Z")
Hello team, I have a connectx-6 lx adapter on a windows 11 pro machine. I created a team using mlx5muxtool.exe for type i chose Aggregate. What exactly does aggregate mean in this context. Is this a static LAG? I woul… --- ## [connectx-6 lx teaming mlx5muxtool doesn't find adapters](https://forums.developer.nvidia.com/t/connectx-6-lx-teaming-mlx5muxtool-doesnt-find-adapters/205946)
**Author:** [@a.wolf](https://forums.developer.nvidia.com/u/a.wolf)\ **Replies:** 3\ **Last updated:** [November 2, 2022, 11:34am UTC](https://forums.developer.nvidia.com/t/connectx-6-lx-teaming-mlx5muxtool-doesnt-find-adapters/205946 "2022-11-02T11:34:44Z")
Hello there, i recently installed a connectx-6 lx card in a workstation running windows 10 21H2. i downloaded and installed the latest WINOF2-driver version 2.70.53000\_all with all features. in my device manager i can … --- ## [Ibverbs on windows](https://forums.developer.nvidia.com/t/ibverbs-on-windows/231574)
**Author:** [@wmm\_fr](https://forums.developer.nvidia.com/u/wmm_fr)\ **Replies:** 1\ **Last updated:** [October 28, 2022, 1:59am UTC](https://forums.developer.nvidia.com/t/ibverbs-on-windows/231574 "2022-10-28T01:59:54Z")
Hello, I installed devx sdk and got the mlx5\_verbs, however did not get the ibv\_create\_qp API. Any suggestions? --- ## [Inconsistent UDP Multicast transmission performance on windows](https://forums.developer.nvidia.com/t/inconsistent-udp-multicast-transmission-performance-on-windows/226619)
**Author:** [@Micycle](https://forums.developer.nvidia.com/u/Micycle)\ **Replies:** 1\ **Last updated:** [September 5, 2022, 1:56am UTC](https://forums.developer.nvidia.com/t/inconsistent-udp-multicast-transmission-performance-on-windows/226619 "2022-09-05T01:56:38Z")
I have a setup with a Linux server connected directly via a 40 Gb QSFP cable to a desktop PC running Windows 10 that has a Mellanox Connect-X 3 pro network card. I am sending multicast UDP packets on the Linux server and… --- ## [How to adjust the CQ parameters to reduce network latency with MlxNdPerf.exe?](https://forums.developer.nvidia.com/t/how-to-adjust-the-cq-parameters-to-reduce-network-latency-with-mlxndperf-exe/216038)
**Author:** [@grv2025](https://forums.developer.nvidia.com/u/grv2025)\ **Replies:** 0\ **Last updated:** [May 31, 2022, 2:23am UTC](https://forums.developer.nvidia.com/t/how-to-adjust-the-cq-parameters-to-reduce-network-latency-with-mlxndperf-exe/216038 "2022-05-31T02:23:12Z")
Hello. I’m working on Windows RDMA performance with MlxNdPerf.exe. The purpose of this measurement was to reduce the network Latency , and I tried modify the parameters of CQ Parameter(ex.CqMod Count/CqMod Int), but … --- ## [Example projects for RDMA communicate application on Windows 10](https://forums.developer.nvidia.com/t/example-projects-for-rdma-communicate-application-on-windows-10/215660)
**Author:** [@grv2025](https://forums.developer.nvidia.com/u/grv2025)\ **Replies:** 2\ **Last updated:** [May 27, 2022, 1:01am UTC](https://forums.developer.nvidia.com/t/example-projects-for-rdma-communicate-application-on-windows-10/215660 "2022-05-27T01:01:40Z")
I’m trying to create an RDMA communication app on windows 10 with connectx-5. I’ve confirmed that I use MlxNdPerf.exe to measure some performance, but I couldn’t find a project for this application. Is this app or a s… --- ## [Is RDMA/RoCE with WinOF and Windows 10 possible? How about from a Hyper-V Linux box on that same system?](https://forums.developer.nvidia.com/t/is-rdma-roce-with-winof-and-windows-10-possible-how-about-from-a-hyper-v-linux-box-on-that-same-system/206710)
**Author:** [@andrew.lucas1](https://forums.developer.nvidia.com/u/andrew.lucas1)\ **Replies:** 3\ **Last updated:** [May 26, 2022, 6:38am UTC](https://forums.developer.nvidia.com/t/is-rdma-roce-with-winof-and-windows-10-possible-how-about-from-a-hyper-v-linux-box-on-that-same-system/206710 "2022-05-26T06:38:32Z")
Is RDMA/RoCE with WinOF and Windows 10 possible? How about from a Hyper-V Linux box on that same system? I surmise that it would have to be EN, rather than IB. There is older documentation out on the web that says no,… --- ## [Windows DPDK bifurcation support](https://forums.developer.nvidia.com/t/windows-dpdk-bifurcation-support/212498)
**Author:** [@martin.birks](https://forums.developer.nvidia.com/u/martin.birks)\ **Replies:** 1\ **Last updated:** [May 22, 2022, 1:12pm UTC](https://forums.developer.nvidia.com/t/windows-dpdk-bifurcation-support/212498 "2022-05-22T13:12:38Z")
We have been looking into adding kernel bypass support for Mellanox NICs on Windows. Could you tell me the current state of DPDK support for Mellanox NICs on Windows, in particular is bifurcation supported? If this is su… --- ## [How to measure RDMA performance with MlxNdPerf.exe (windows)](https://forums.developer.nvidia.com/t/how-to-measure-rdma-performance-with-mlxndperf-exe-windows/205986)
**Author:** [@shane.kirkbride1](https://forums.developer.nvidia.com/u/shane.kirkbride1)\ **Replies:** 1\ **Last updated:** [October 15, 2021, 12:16am UTC](https://forums.developer.nvidia.com/t/how-to-measure-rdma-performance-with-mlxndperf-exe-windows/205986 "2021-10-15T00:16:38Z")
I have a Bluefield2 card set in an RDMA configuration; installed on a windows PC. I know the setup is correct because I can get rping and nd\_rping to work on the ARM and windows host respectively. I’ve tried to run MlxN… [Next page](https://forums.developer.nvidia.com/c/infrastructure/software-and-drivers/winof-driver/533.md?page=1)