I Have a Dream... (how to rewrite memory SPD)

[Karvizzz]

Hi,

 

Soooo i've been pokin around ddr memories and most of the seem to have identical chips layuouts and other info, and the manufacturing factory and time is roughly the same. I would like to write SPD on a ramstick and how do i do it? I need to edit the manufacturer, model speed and such on the module. How is this accomplished? Has anyone done this?

Edited March 1, 2019 by Karvizzz

[Braegnok]

Years ago for DDR3 you would use Thaiphoon Burner,.. not sure what software they are using nowadays.

 

Re-binning memory modules is not something to be taken lightly, you need i2c-tools to decode-dimms for reading RAM information in a human-readable format. It requires the eeprom kernel module to be accessed via SMBus to read the Serial presence detect (SPD).

 

Unless your working on a MacBook Pro with soldered modules, re-binning and writing the code is not worth the hassle.

 

Be very careful if you try this at home. You may obviously damage or permanently write-protect your DIMM. More subtle possible accidents include messing up your battery logic circuit or even bricking your motherboard. 

Edited March 2, 2019 by Braegnok

[ir_cow]

I was  looking into this also. I don't think you can rewriite the SPD. They are read-only these days from what I can tell.  Maybe it only seems like read-only since Thaiphoon Burner can't do anything besides read my Gskill memory.

[Braegnok]

You need to rewrite the code. This example shows various tools needed, using an Arduino for modifying RAM SPD Data.   http://blog.zakkemble.net/modifying-ram-spd-data/

Edited March 4, 2019 by Braegnok