Adaptec AHA-3940 Driver Download (Official)

Adaptec Drivers

The AHA-3940 is a disk drive controller manufactured by Adaptec. This driver fixes problems with drive not found, slow or unreliable data transfer, intermittent connection or hardware conflicts. This update - "aic78xx_aic78u2_vista_x86_v605456.exe" - has an average rating of 5 out of 5 stars based on 4 reviews, and has been downloaded 62 times. Our users report success installing this driver update on PCs running Windows XP. The total disk space used for this update is 141.1 KB.

4 Ratings (see all reviews)
62 Downloads

Supported Models

AHA-3940

AHA-3940AU

AHA-3940AUW

AHA-3940U

AHA-3940UW

AHA-3940UWD

AHA-3940W

Manufacturers

Adaptec

Supported Operating Systems

Windows Vista

File Name

Versions

6.0.5456 (17-Apr-2007)

Additional Notes

SCSI Controller Driver File

Uploaded By

Gitanjali (DG Staff Member) on 3-Feb-2012

Most Helpful Reviews

 
sswwq
Tested on Windows XP
29 May 2013
(15 minutes after download)
 

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
 
"Thank you very much, I can use. Thanks a lot!!!"
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See all Adaptec AHA-3940 ratings and reviews

Device Hardware IDs

Compatible IDs

PCI\CC_0100

PCI\CC_010000

PCI\VEN_9004

PCI\VEN_9004&CC_0100

PCI\VEN_9004&CC_010000

PCI\VEN_9004&DEV_7178&SUBSYS_00000000&REV_00

PCI\VEN_9005

PCI\VEN_9005&CC_0100

PCI\VEN_9005&CC_010000

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
AIC78U2.INF 4.1 KB 14 Feb 2007
Aic78xx.inf 9.6 KB 17 Apr 2007
aic78u2.sys 62.0 KB 6 Jul 2006
aic78xx.sys 64.0 KB 6 Jul 2006

How to Update AHA-3940 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the AHA-3940 driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Adaptec AHA-3940 into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Adaptec Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Adaptec website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with Adaptec. All company names/logos are properties of their owners.
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