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

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#1 Karvizzz

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Posted 01 March 2019 - 08:53 AM

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 by Karvizzz, 01 March 2019 - 08:55 AM.


#2 Braegnok

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Posted 01 March 2019 - 12:47 PM

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 by Braegnok, 01 March 2019 - 04:57 PM.

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#3 ir_cow

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Posted 02 March 2019 - 09:10 AM

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.


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#4 Braegnok

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Posted 03 March 2019 - 05:38 PM

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


Edited by Braegnok, 04 March 2019 - 04:22 AM.

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