Description
Apple 820-0522-A Power Macintosh 7100 VRAM Expansion Video Card PDS 1993
The Apple 820-0522-A is a PDS (Processor Direct Slot) VRAM expansion and video output card designed for the Apple Power Macintosh 7100. It provides onboard VRAM and video output capability via a DB-15 connector, with additional VRAM expansion slots on the card. The board is dated 1993 and was manufactured in Singapore.
Specifications & What's Included
- Manufacturer Part Number: 820-0522-A
- Compatible System: Apple Power Macintosh 7100
- Interface: PDS (Processor Direct Slot)
- Main Controller Chip: Brooktree Bt9055
- Secondary IC: Apple-marked chip, part 341S0020, date code 9422 D
- VRAM: Populated onboard VRAM chips (multiple ICs visible)
- VRAM Expansion: 4 additional SIMM-style VRAM expansion slots
- Video Output Connector: DB-15 (HD-15) on card bracket
- PCB Dimensions: Approximately 8" x 5" x 1"
- Year of Manufacture: 1993
- Country of Origin: Singapore
- Sold as-is; no accessories included
Applications
The Power Macintosh 7100 was part of Apple's first generation of PowerPC-based Macintosh computers, introduced in 1994. The PDS (Processor Direct Slot) was a proprietary high-speed expansion slot used in several early-to-mid 1990s Macintosh models, giving cards direct access to the processor bus for higher bandwidth than NuBus could provide. The 820-0522-A provides the 7100 with its primary video output and allows VRAM to be expanded beyond the base configuration, enabling higher resolutions and greater color depth. The Brooktree Bt9055 chip on this card handles the RAMDAC (digital-to-analog conversion) function, converting the framebuffer data to the analog video signal sent to the monitor. These cards are sought today primarily by vintage Macintosh collectors and enthusiasts maintaining or restoring Power Macintosh 7100 systems.
This Apple 820-0522-A Power Macintosh 7100 VRAM Expansion Video Card is being sold as-is for parts or repair. Due to its age, we were unable to test or verify functionality, and no guarantee of working condition is offered. The card shows normal wear consistent with vintage hardware from 1993 — light surface oxidation is visible on the metal bracket, and the PCB and components appear physically intact with no obvious broken traces or missing parts visible in the photos. Please review our full photo set carefully before purchasing, and contact us with any questions.
Warranty Information
Additional Information
Brand: |
Apple |
Model: |
820-0522-A |
MPN: |
820-0522-A |
Type: |
VRAM Expansion / Video Card |
SKU: |
28561 |
Compatible With: |
Apple Power Macintosh 7100 |
Interface: |
PDS (Processor Direct Slot) |
Chipset: |
Bt9055 |
Form Factor: |
PDS Card |
Dimensions: |
8" x 5" x 1" |
Output Connector: |
DB-15 (HD-15) Video Out |
Year of Manufacture: |
1993 |
Country/Region of Manufacture: |
Singapore |
Seller Notes: |
Sold as-is for parts or repair; unable to test due to age. |
Condition Notes: |
This Apple 820-0522-A Power Mac 7100 VRAM Expansion PDS Video Card is sold as-is for parts or repair. Unable to test due to age; no functionality guarantee. Physical condition appears intact. Please view photos and contact us with questions. |
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 |
