ATTO Technology, Inc. ATTO ExpressSAS H644 Host Adapter - two ways of downloading and installing the driver

ATTO ExpressSAS H644 Host Adapter is a SCSI Adapter hardware device. This Windows driver was developed by ATTO Technology, Inc.. PCI/VEN_117C&DEV_0042&SUBSYS_0046117C is the matching hardware id of this device.

1. Manually install ATTO Technology, Inc. ATTO ExpressSAS H644 Host Adapter driver

1. Download the setup file for ATTO Technology, Inc. ATTO ExpressSAS H644 Host Adapter driver from the location below. This download link is for the driver version 2.20.4000.6000 released on 2016-12-15.
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3. Run the driver installation file from a Windows account with administrative rights. If your User Access Control Service (UAC) is started then you will have to accept of the driver and run the setup with administrative rights.
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5. Go through the driver setup wizard, which should be quite straightforward. The driver setup wizard will scan your PC for compatible devices and will install the driver.
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7. Shutdown and restart your computer and enjoy the new driver, as you can see it was quite smple.
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This driver is digitally signed by ATTO Technology, Inc..
Download size of the driver: 417960 bytes (408.16 KB)
This driver received an average rating of 4.2 stars out of 44880 votes.
This driver is compatible with the following versions of Windows:

• This driver works on Windows XP 64 bits
• This driver works on Windows Vista 64 bits
• This driver works on Windows 7 64 bits
• This driver works on Windows 8 64 bits
• This driver works on Windows 8.1 64 bits
• This driver works on Windows 10 64 bits
• This driver works on Windows 11 64 bits

2. How to install ATTO Technology, Inc. ATTO ExpressSAS H644 Host Adapter driver using DriverMax

The advantage of using DriverMax is that it will install the driver for you in the easiest possible way and it will keep each driver up to date, not just this one. How easy can you install a driver with DriverMax? Let's follow a few steps!

1. Open DriverMax and press on the yellow button that says ~SCAN FOR DRIVER UPDATES NOW~. Wait for DriverMax to analyze each driver on your computer.
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3. Take a look at the list of driver updates. Scroll the list down until you find the ATTO Technology, Inc. ATTO ExpressSAS H644 Host Adapter driver. Click on Update.
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5. That's it, you installed your first driver!
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