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 63 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.
AHA-3940
AHA-3940AU
AHA-3940AUW
AHA-3940U
AHA-3940UW
AHA-3940UWD
AHA-3940W
Windows Vista
6.0.5456 (17-Apr-2007)
SCSI Controller Driver File
Gitanjali (DG Staff Member) on 3-Feb-2012
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PCI\VEN_9004&DEV_3860&SUBSYS_38699004
PCI\VEN_9004&DEV_3860&SUBSYS_38699004&REV_03
PCI\VEN_9004&DEV_3860&SUBSYS_38699004&REV_03\3&61AAA01&0&50
PCI\VEN_9004&DEV_3860&SUBSYS_38699004&REV_03\4&1C660DD6&0&08F0
PCI\VEN_9004&DEV_5078&SUBSYS_00000000&REV_01
PCI\VEN_9004&DEV_5078&SUBSYS_78509004
PCI\VEN_9004&DEV_5078&SUBSYS_78509004&REV_03
PCI\VEN_9004&DEV_5078&SUBSYS_78509004&REV_03\4&1F7DBC9F&0&00F0
PCI\VEN_9004&DEV_5078&SUBSYS_78509004&REV_03\4&5DCE646&0&08F0
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.
To install your new driver on Windows:
Right-click the Start button.
Click "Device Manager">
Find your device in the list.
Right-click the device and select "Update driver"
Follow the steps on screen.
Restart your computer when done.
This keeps your computer working at its best.
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.
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 |