| Released | Acronym and Extended Name | Models that used it |
|---|---|---|
| 1985 | OCS - Original Chipset | A1000, A2000, A500 |
| 1990 | ECS - Extended Chipset | A3000, A500+, A600, A2000 |
| 1992 | AGA - Advanced Graphics Architecture | A1200, A4000, CD32 |
| Chip Number | Chip Name | Specs | Notes |
|---|---|---|---|
| 8370 | Agnus | 512KB | NTSC, can be swapped for an 8372 |
| 8372A | Fat Agnus | 1MB | NTSC, can be swapped for an 8370 |
| 8372B and 8375 | SuperFat Agnus | 2MB | NTSC, hard to find, grab it if you can get it, I think this is the standard chip for all ECS machines; I also believe this can be swapped for any of the others but you may not get all of the 2MB without other mods |