VMware ESXi 8.0 Update 3i and vCenter Server 8.0 Update 3h Download Guide
This guide covers two VMware vSphere ISO images: VMware-VMvisor-Installer-8.0U3i-25205845.x86_64.iso for ESXi and VMware-VCSA-all-8.0.3-25092719.iso for the vCenter Server Appliance installer. They are from different release points, so verify the intended build and upgrade path before using them.
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Download VMware ESXi and vCenter Server ISO Files
Use the official Broadcom Support Portal to download each file. These buttons open the vendor portal; they are not direct public ISO links, because Broadcom sign-in and product entitlement may be required.
In the portal, search for the exact filenames VMware-VMvisor-Installer-8.0U3i-25205845.x86_64.iso and VMware-VCSA-all-8.0.3-25092719.iso. Confirm the build, checksum and entitlement before downloading.
At a glance
- ESXi ISO: VMware-VMvisor-Installer-8.0U3i-25205845.x86_64.iso — ESXi 8.0 Update 3i, build 25205845.
- vCenter ISO: VMware-VCSA-all-8.0.3-25092719.iso — vCenter Server 8.0 Update 3h, build 25092719.
- Download only from Broadcom Support Portal with the correct entitlement.
- Verify file details and vendor-provided checksums before deployment.
1. VMware ESXi 8.0 Update 3i ISO
ESXi is the bare-metal hypervisor in VMware vSphere. The ISO installs ESXi on supported server hardware and may be used in supported host upgrade workflows.
| Property | Details |
|---|---|
| Filename | VMware-VMvisor-Installer-8.0U3i-25205845.x86_64.iso |
| Release | ESXi 8.0 Update 3i |
| Build | 25205845 |
| Release date | February 24, 2026 |
| Published ISO size | Approximately 630 MB; confirm in Broadcom portal |
| Published SHA-256 | 5f078a102ca1d7f7d612cc03ba2abbacf88b84aabaabb868b7e538c6ab381d0f |
References: Broadcom ESXi build table and ESXi 8.0 Update 3i release notes. Verify checksum against the official portal before use.
Before installing ESXi
- Check server, CPU, network adapter, storage controller and firmware compatibility.
- Back up configuration and virtual machines; plan workload evacuation or shutdown before reboot.
- Check whether the hardware vendor recommends an OEM-custom ESXi image with specific drivers.
- Record networking, storage paths, licensing and current build.
2. VMware vCenter Server Appliance 8.0 Update 3h ISO
vCenter Server centrally manages vSphere inventory, clusters, permissions and supported lifecycle operations. The VCSA ISO provides the installer for deploying or managing the appliance using the release-specific workflow.
| Property | Details |
|---|---|
| Filename | VMware-VCSA-all-8.0.3-25092719.iso |
| Release | vCenter Server 8.0 Update 3h |
| Build | 25092719 |
| Release date | December 15, 2025 |
| Artifact | VCSA installer ISO |
References: Broadcom vCenter build table and vCenter 8.0 Update 3h release notes.
How to download the files
- Open the Broadcom Support Portal and sign in.
- Navigate to the VMware vSphere downloads available to your account.
- Search for ESXi 8.0U3i build 25205845 and vCenter Server 8.0U3h build 25092719 separately.
- Verify filename, build, release notes, file size and checksum details for each artifact.
- Download to a controlled repository and document versions and hashes.
- Read the release notes, compatibility matrix and security advisories before installation.
Verify the ISO files on Windows
Compare each file against the authoritative SHA-256 checksum supplied for that exact artifact:
Get-FileHash "C:\Downloads\VMware-VMvisor-Installer-8.0U3i-25205845.x86_64.iso" -Algorithm SHA256
Get-FileHash "C:\Downloads\VMware-VCSA-all-8.0.3-25092719.iso" -Algorithm SHA256Do not assume one file’s checksum applies to the other. Stop if a hash differs.
Deployment planning
For a new ESXi host
- Confirm hardware compatibility and BIOS/UEFI configuration.
- Back up existing data and verify target boot media.
- Boot from the ISO or use the supported installation/upgrade method.
- Configure management networking, DNS, NTP, storage and security settings.
- Validate host health and management connectivity.
For vCenter Server Appliance
- Confirm DNS forward/reverse resolution and target compatibility.
- Back up the current VCSA before an upgrade and document its build.
- Mount the ISO on a supported workstation and start the correct installer workflow.
- Follow the official deployment or upgrade procedure for the selected release.
- Verify services, inventory, certificates, backups and host connectivity afterward.
Current-release note
These are specific builds, not necessarily the newest available. Broadcom lists vCenter Server 8.0 Update 3k build 25600417 dated July 29, 2026, and later ESXi 8.0U3 release information. Review the supported release, licensing, hardware compatibility and security advisories before selecting an older ISO.
Related VMoreCloud guides: VMware vSphere 8.0 Update 3k and VMware vSphere 9.0.1 download.
Official references
- Broadcom ESXi build numbers
- ESXi 8.0U3i release notes
- Broadcom vCenter build numbers
- vCenter 8.0U3h release notes
- Broadcom download instructions
- Broadcom Support Portal
Final recommendation
Use the ESXi ISO only after validating hardware compatibility, and treat the VCSA ISO as a separate appliance installer. Because the supplied files correspond to ESXi 8.0U3i and vCenter 8.0U3h, confirm the intended pairing and upgrade sequence in Broadcom documentation. For production, select a currently supported release appropriate to your environment.
Editorial note: This guide is based on public Broadcom build records and release documentation. It does not claim independent testing or host proprietary VMware installers. Verify release details in the official portal before deployment.
