Description
Adaptec AHA-1740 EISA SCSI Controller Card 68-Pin External AIC-7770 Chipset
The Adaptec AHA-1740 is a full-length EISA-bus SCSI-2 host adapter built around Adaptec's AIC-7770 controller chipset. It provides Fast SCSI connectivity via a 68-pin external (HD68) port and dual internal 50-pin IDC headers, allowing a host system to connect a broad range of SCSI-2 peripherals including hard drives, tape drives, optical drives, and scanners. The chip label visible on the main controller reads AHA-1740 S23 / 479100 D with a date code of 9239, placing manufacture in late 1992.
Specifications & What's Included
- Model: Adaptec AHA-1740
- Controller Chipset: Adaptec AIC-7770
- Bus Interface: EISA (Extended Industry Standard Architecture) — full-length card
- SCSI Standard: Fast SCSI / SCSI-2
- External Connector: 1x 68-pin HD68 SCSI port on bracket
- Internal Connectors: 2x 50-pin IDC SCSI headers (visible on PCB)
- Part Number on Chip: 479100 D
- Chip Revision: S23
- Date Code: 9239 (39th week of 1992)
- Form Factor: Full-length EISA expansion card
- Bracket Label: "SGL"
- Included: Card only — no cables or accessories
Applications
The AHA-1740 was designed for EISA-bus workstations and servers of the early-to-mid 1990s — a generation of high-performance PC-compatible systems from manufacturers like Compaq, HP, AST, and others that used EISA as an alternative to ISA for higher bandwidth expansion. EISA provided 32-bit bus access at 8.33 MHz, and host adapters like the AHA-1740 took advantage of that bandwidth to drive multiple Fast SCSI devices simultaneously, making it a common choice for small departmental servers and CAD workstations of the era. The AIC-7770 chipset was Adaptec's workhorse EISA SCSI controller, supporting bus mastering DMA for reduced CPU overhead. Today these cards are sought by collectors and hobbyists maintaining legacy EISA-based systems, as well as industrial and scientific environments where older EISA workstations remain in service driving legacy SCSI instruments or storage arrays.
This Adaptec AHA-1740 EISA SCSI Controller Card has been inspected and appears to be in good condition. The PCB is clean with no visible damage, broken traces, or missing components. The 68-pin external SCSI connector and internal 50-pin headers look intact. The bracket has a handwritten "SGL" label. Normal light handling wear is present consistent with prior installation in a workstation or server. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Adaptec |
Model: |
AHA-1740 |
MPN: |
AHA-1740 |
Secondary Model: |
479100 D |
Type: |
SCSI Host Adapter / Controller Card |
SKU: |
34749 |
Chipset: |
Adaptec AIC-7770 |
Bus Interface: |
EISA |
SCSI Type: |
Fast SCSI / SCSI-2 |
External Connector: |
68-Pin SCSI (HD68) |
Internal Connector: |
50-Pin IDC (internal ribbon) |
Form Factor: |
Full-Length EISA Card |
Condition: |
Used – Inspected and Pulled from Working Environment |
Seller Notes: |
Card only; no cables or accessories included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
Adaptec AHA-1740 EISA SCSI Controller Card. Inspected, good condition. PCB clean, connectors intact. Normal light wear from prior installation. Card only, no cables. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
