SPD Timings Editing and SPD Flashing

[Ascii2]

When setting memory timings is not optional in BIOS, many BIOSes run the memory at the timings and frequency of the highest frequency described in SPD data, even when that frequency exceeds the bus speed. In these cases, the only way to run the RAM and bus at 1:1 ratio is to flash new SPD information such that the greatest SPD frequency described in SPD is equivalent to the bus speed.


There seems to currently be only three software tools (version numberings not withstanding) capable of editing SPD information of memory modules in motherboard RAM sockets:

SPDTool ( http://forums.techpowerup.com/showthread.php?t=20349 )
Thaiphoon Burner ( http://cbid.at.tut.by/ )
SPD-Z (No longer available from publisher; should only works on OCZ Memory Modules)

Which tool is recommended to edit the SPD timings?

If a memory module's SPD chip is flashed, and the memory module ceases to function correctly, can the memory module be recovered without the use of specialized hardware not on a motherboard (like by reflashing the memory module in the motherboard RAM socket)?

[VVJ]

No doubt, Thaiphoon Burner is highly recommended! The recent version 6.0.6.0 build 0221 now features Timing Table Editor specific for DDR3 SPD. Besides, through the Timing Table Editor of Thaiphoon Burner you can edit DDR and DDR2 timings less than a minute!

[kiwi]

Sure thaiphoon is nice but it is not freeware.

[Ascii2]

Both SPDTool and Thaiphoon Burner have a option to "Fix Checksum". What is the checksum to be fixed and when should the option be invoked?

If memory modules are flashed such that they are not bootable in BIOS, how can the modules be recovered? Would hot-swapping (substituting a known working device just prior to flashing) the memory modules work?