You can add a 3DMark Advanced Edition license key to Steam. The process varies depending on the type of key you have. It is not possible to activate Professional Edition licenses on Steam.

For a license that starts with 3DM-ICF-

To add a 3DMark Advanced Edition license that starts with 3DM-ICF- to Steam, open the Steam client, click the "+ADD A GAME" button at the bottom of the window, then "ACTIVATE A PRODUCT ON STEAM," and then follow the instructions.

For a license that starts with 3DM-ICFT-

To add a 3DMark Advanced Edition license that starts with 3DM-ICFT- to Steam, first create an account on 3dmark.com or log in to your existing account. If your 3dmark.com account does not have a Steam sign-in associated with it, you need to add the Steam sign-in method to your account before you can add your license key. Next, go the Settings page, add your license key in the box under ADD 3DMARK UPGRADE WITH TIME SPY TO YOUR STEAM LIBRARY, and then click on the SUBMIT button. This action can be performed only once for a license key.

For an upgrade license that starts with 3DM-ICFTP-

To add a 3DMark Advanced Edition license that starts with 3DM-ICFT- to Steam, first create an account on 3dmark.com or log in to your existing account. If your 3dmark.com account does not have a Steam sign-in associated with it, you need to add the Steam sign-in method to your account before you can add your license key. Next, go the Settings page, add your license key in the box under ADD 3DMARK UPGRADE WITH TIME SPY TO YOUR STEAM LIBRARY, and then click on the SUBMIT button. This action can be performed only once for a license key.

For an upgrade license that starts with 3DM-SPY-

To add a 3DMark Advanced Edition Time Spy upgrade license that starts with 3DM-SPY- to Steam, first create an account on 3dmark.com or log in to your existing account. If your 3dmark.com account does not have a Steam sign-in associated with it, you need to add the Steam sign-in method to your account before you can add your license key. Next, go the Settings page, add your license key in the box under ADD 3DMARK TIME SPY UPGRADE TO YOUR STEAM LIBRARY, and then click on the SUBMIT button. Please note that you must already own 3DMark Advanced Edition in your Steam account for this option to be available. This action can be performed only once for a license key.

For an upgrade license that starts with 3DM-PR

To add a 3DMark Advanced Edition Port Royal upgrade license that starts with 3DM-PR- to Steam, first create an account on 3dmark.com or log in to your existing account. If your 3dmark.com account does not have a Steam sign-in associated with it, you need to add the Steam sign-in method to your account before you can add your license key. Next, go the Settings page, add your license key in the box under ADD 3DMARK PORT ROYAL UPGRADE TO YOUR STEAM LIBRARY, and then click on the SUBMIT button. Please note that you must already own 3DMark Advanced Edition in your Steam account for this option to be available. This action can be performed only once for a license key.