is there a chip labeled A5 on the other side?
from the numbers it looks like a rom module, possibly 4megabyte worth (only 3.5 visible in photo

Hello weedeewee and thanks for your answer.
Yes, there is a A5 chip on the other side.
Ok, so it looks to be a rom module...
Do you have an idea of which apple can receive this module ?

parhelia512 wrote on 2022-02-27, 20:55:

Hello weedeewee and thanks for your answer. Yes, there is a A5 chip on the other side. Ok, so it looks to be a rom module... Do […]
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Hello weedeewee and thanks for your answer.
Yes, there is a A5 chip on the other side.
Ok, so it looks to be a rom module...
Do you have an idea of which apple can receive this module ?

might be one of the ones listed here
https://www.macintoshrepository.org/7038-all- … h-roms-68k-ppc-
under the 4MB category

--- 4MB --- […]
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--- 4MB ---

1994-03 - 9FEB69B3 - Power Mac 6100 & 7100 & 8100.ROM
1994-04 - 9C7C98F7 - Workgroup Server 9150 80MHz.ROM
1995-01 - 9B7A3AAD - Power Mac 7100 (newer).ROM
1995-04 - 63ABFD3F - Power Mac & Performa 5200,5300,6200,6300.ROM
1995-04 - 9B037F6F - Workgroup Server 9150 120MHz.ROM
1995-08 - 83C54F75 - Powerbook 2300 & PB5x0 PPC Upgrade.ROM
1995-08 - 9630C68B - Power Mac 7200&7500&8500&9500 v2.ROM
1995-08 - 96CD923D - Power Mac 7200&7500&8500&9500 v1.ROM
1996-08 - 6F5724C0 - PowerMac, Performa 6400.ROM
1996-10 - 83A21950 - PowerBook 1400, 1400cs.ROM
1997-02 - 6E92FE08 - Power Mac 6500.ROM
1997-02 - 960E4BE9 - Power Mac 7300 & 7600 & 8600 & 9600 (v1).ROM
1997-02 - 960FC647 - Power Mac 8600 & 9600 (v2).ROM
1997-11 - 78F57389 - Power Mac G3 (v3).ROM
1997-11 - 79D68D63 - Power Mac G3 desktop.ROM
1998-03 - CBB01212 - PowerBook G3 Wallstreet.ROM
1998-08 - B46FFB63 - PowerBook G3 Wallstreet PDQ.ROM

though no photos show up of the modules so far...

Thanks

The part number is really close of the 256KB L2 cache one :
https://www.ebay.fr/itm/114208727907?_trkparm … %3ABFBMut7fz-df

So,
820-0671-02 possibly 4MB ROM for Apple Performa 6300
.