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Amiga Chipsets
Graphic Chipsets
| 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 |
Custom Chips
| 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 |
Agnus
This is the main graphics chip for Amigas.
You can swap 8370 (512KB) and 8372(1024KB) chips whenever/wherever you like. Of course memory limits are tied to the chip.
You can't swap an 8375 (2MB) for a 512/1024KB chip and get more memory. There are other changes needed to for the large memory addresses.
Format/package - (84) contact PLCC Fat Agnus (named Fat Lady on most Amiga 2000 motherboards) 8370; 8371; 8372; 8372A; 8372AB; 8372B; 8375
| Chip Name | Chip Number | Part Number | Used In |
| Agnus (512K) | 8361 | 252125-01 | A1000 (NTSC), A2000A (NTSC) |
| Agnus (512K) | 8361 R3 | A1000(NTSC), A2000A(NTSC) |
| Agnus (512K) | 8367 | 252362-01 | A1000 (PAL), A2000A (PAL) |
| Agnus (512K) | 8370 | 318070-01 | A500 (NTSC), A2000 (NTSC), can be swapped for an 8372 |
| Agnus (512K) | 8371 | 318071-01 | A500 (PAL), A2000 (PAL) |
| Agnus (1MB) | 8372 | 318069-02 | A500 (PAL), A2000 (PAL) Regular Type |
| Agnus (1MB) | 8372A | 318069-02 | A500 (PAL), A2000 (NTSC), can be swapped for an 8370 |
| Agnus (1MB) | 8372A | 318069-029 | A500 (PAL), A2000 (PAL) (changed after some damage) |
| Agnus (2MB) | 8372AB | 318069-03 | A3000 (PAL), A3000T (PAL) |
| Agnus (2MB) | 8372B | 318069-03 | MegAChip (NTSC) |
| Agnus (2MB) | 8375 R0 | 318069-18 | A500+ (PAL), A600 (PAL) |
| Agnus (1MB) | 8375 / 8375 R1 | 318069-16 | A500 (PAL), A2000 (PAL) |
| Agnus (2MB) | 8375 R2 | 318069-10 | A500+ (PAL), A600 (PAL) |
| Agnus (2MB) | 8375 | 318069-11 | A500+(NTSC) and A600(NTSC) |
| Agnus (1MB) | 8375 | 318069-17 | A500 (NTSC), A2000 (NTSC) in rev 6.4 |
| Agnus (2MB) | 8375 | 318069-19 | A3000 (NTSC), A3000T (NTSC) |
| Agnus (2MB) | 8375 | 390544-01 | A500+ (PAL), A600 (PAL) |
| Agnus (2MB) | 8375 | 390544-02 | A500+ (NTSC), A600 (NTSC) |