Check RAM size before Installing NON VOLATILE RAM on SNES SFC carts. No more batteries! No game saves lost! How to identify SNES RAM memory sizes | CustomRetroStuff.com

How to identify SNES/SFC onboard RAM memory sizes.


Most SNES/SFC battery backed up games are equipped with four ram memory sizes, 2, 8, 16 or 32 kilobytes.


On SNES & SFC cartridges RAM memory chips are used to store user information and game advances or profiles, to save this information when power is off it uses a battery mounted inside the cartridge. 


Notes: *For other configurations: They are unsupported at this time. ** NVRAM upgrade kits are not fully tested or developed for early NES/FC cartridges, in theory they shoiuld work, but because it is still a “work in progress" it may not work properly or may not work at all in this platforms.

For 2 Kbyte Ram: It is a 24 pin chip, 16Kx8 ram. Usually labeled as “16K RAM”, “16K SRAM” or "16K WRAM”, it may be confusing because it’s noted in Kilobits. Read the label on top of the chip, it must have a 4 digit code ending with 16 (XX16). Ignore other characters, they only indicates manufacturer and date codes. The following are Known chips used by Nintendo: 5116, 6216 and 6116.

You can get a 2Kbyte (16Kbit) NVRAM upgrade kits here

5216
6116

Note the different shape, nintendo used the same chips in different packages on the same boards, they are fully interchangeable because of the three rows of mounting holes. The same applies for most SNES, SFC, NES and FC cartridges. 


For 8 Kbyte Ram: it's a 28 pin chip, 64Kx8 ram. Usually labeled as “64k RAM”, “64K SRAM” or "64K WRAM" it may be confusing because it’s noted in Kilobits. Read the label on top of the chip, it must have a 4 digit code ending with 64, 65 or 68 (XX64, XX65 or XX68). Ignore other characters, they only indicates manufacturer and date codes. The following are Known chips used by Nintendo: 2465, 4464, 5164, 5268, 6264 and 6265.

You can get a 8Kbyte (64Kbit) NVRAM upgrade kits here.

6265dip


For 8 Kbyte SMD Ram: it's a 28 pin surface mount chip, 64Kx8 ram. Usually labeled as “64k RAM”, “64K SRAM” or "64K WRAM" it may be confusing because it’s noted in Kilobits. Read the label on top of the chip, it must have a 4 digit code ending with 64, 65 or 68 (XX64, XX65 or XX68). Ignore other characters, they only indicates manufacturer and date codes. The following are Known chips used by Nintendo: 2465, 4464, 5164, 5268, 6264 and 6265. Additional note: uses the same kit as the 8byte Game Boy cartridges.

SHVC-A2MJ-0-front

Same kit and installation instructions as the 8kbyte GameBoy NVRAM kit


For 16 kByte Ram: It is a rare configuration, usually composed by two 8kbyte ram chips.  Depending on specific game configuration, one or two of the memory chips onboard may be powered from the battery back-up. Replace only the chip or chips powered by battery, use the same rules to identify those chips as explained in the last step (8kByte ram).

For 32kByte standard Ram: a 28 pin DIP chip, in some boards it’s labeled as “256K RAM”, again it’s noted in Kilobits. Read the label on top of the chip, it must have a 5 digit code ending with 256 (XX256). Ignore the rest of the characters, they only indicates manufacturer and date codes. It is unsupported at this time. The following are Known chips used by Nintendo: 52256 and 62256

62256

Unsupported.

For 32kByte SMD Ram: It's a 28 pin SMD chip, in some boards it’s labeled as “256K RAM”, again it’s noted in Kilobits. Read the label on top of the chip, it must have a 5 digit code ending with 256 (XX256). Ignore the rest of the characters, they only indicates manufacturer and date codes. The following are Known chips used by Nintendo: 52256 and 62256 Additional note: uses the same kit as the 32kbyte Game Boy cartridges.

62256smd

Same kit and installation instructions as the 32kbyte GameBoy NVRAM kit


Once you know the type and size of memory, you can purchase the right upgrade kit here.

You can find pictures for most SNES & SFC cartridge PCBs here, it will help you to identify onboard RAM if you can not open your cart or if you want to do your own research for compatible titles (highly recommended).

To continue reading installation instructions click here.


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