Ram Chart

hello,

I have been looking to see if I can find a Ram Compatibility chart anywhere, and am striking out. I know that you can go to crucial.com and scan your system. But I'm kind of looking for a chart that lists like a spreadsheet or something along those lines, that shows like 2700 compatible with 2300, etc. Kind of like that.

I do not know if there is anything like that or not, I may have to make one, but wanted to check first.

thank you!
helms007Asked:
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SysExpertCommented:
DDR and DDR2 are generally backward compatible ( faster RAM works in a slower system )

Same for pc-66/100/133 RAM.

Issues may arise based on motherboard chipset for low vs. high density.

So I do not think that there is any universal chart available.

Please provide details, and maybe e can help out.

I hope this helps !
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MrMintanetCommented:
I hope it helps too!
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PCBONEZCommented:
DDR and DDR2 are not front/back compatible because the modules have a different number of pins.

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MrMintanetCommented:
Agreed with PCBONEZ.  As a matter of fact, that is completely absurd.
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PCBONEZCommented:
So for as speeds being front/back compatible...
That is dependent on the data stored in the SPD on the modules.
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One PC3200 module might have data for it to run at PC2100 but another does not.

The 'rules' are made by JEDEC but the problem is there is no REQUIREMENT for manufacturers to follow the rules. They just can't use the JEDEC 'stamp' on their RAM if they don't.
http://en.wikipedia.org/wiki/JEDEC 
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PCBONEZCommented:
Realistically the best you can do for your chart is rifle through the JEDEC requirements and make the chart IAW with them.

Then put a disclaimer that the chart assumes the RAM is JEDEC compliant.
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MrMintanetCommented:
Or... just find a way to gather all of the data from Crucial and catalog it onto a spreadsheet.  :)
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PCBONEZCommented:
That only works for Crucial Memory.
What about all the others?
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MrMintanetCommented:
What "others"?
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PCBONEZCommented:
Samsung Kingston, Transend, Hynix, OCZ, G Skill, Corsair, A-Data, Elixir, TOPRAM, and Mushkin.
To name a few.
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