GA-P35C-DS3R with 2 x 4GB DDR3L memory, is it incompatible??

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kim7tng

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Sep 28, 2017
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So i got this old motherboard GA-P35C-DS3R rev 1.x, which is with a combo memory DDR2 and DDR3 1066Mhz

so, i had this V-gen Memory 2x4GB which is working fine until 1 day suddenly 1 of it die...

since it has lifetime warranty, i replace both memory to the vendor brand new 2x4GB DDR3
but it wont work with my mobo...i wonder why...tried 1 each wont work too
i check all posibble thing i could think off, but then i notice that this is DDR3L

so, is it DDR3L incompatible with older DDR3 LGA775 motherboard ??

yeah, i know this mobo known officially support only 4GB, but using 1 memory also wont work
and so far i use 8 GB for years now...so i think this maybe because DDR3L memory is incompatible

and also, i found that maybe 128, 256 and 512 IC memory...
is it also what make this memory incompatible with older mobo...

this new DDR3L i got had 8 IC on 1 side only, so is this make a 512 IC chip??
i forget how many IC in my old DDR3 memory, but it work so far until 1 of it die. i use 1 of it few days before i sent it to be replaced

any suggestion and info is really appreciated....
 
Solution
BFG-9000
Technically, DDR3L RAM is required to be backwards compatible with 1.5v so it does not need to run at 1.35v and it's not DDR3L itself that is the problem.

However, Core 2 chipsets are only compatible with extremely low-density 2Gbit memory chips, so the only 4GB DDR3 modules that will work are the ones with 16 chips on them. What we nowadays consider as low density is the 4Gbit chips that Nehalem to Ivy Bridge require (up to 8GB sticks), and of course high density 8Gbit chips work on any newer Intel and all AMD (16GB sticks with 16 chips).

You have 4GB on 8 chips so 512MB per chip * 8 = 4Gbit per chip, which cannot work on Core 2
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cin19

cin19

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and also, i found that maybe 128, 256 and 512 IC memory...
is it also what make this memory incompatible with older mobo...
Click to expand...
When you use the newer memory modules on older intel motherboards, you will get incompatibility problem, because the old intel MB is very picky for the RAM.
As you know, the MB can officially support 4GB ( 2X2GB), so the 4GB size may have problem too.

I recommend when you buy the RAM for the old intel MB, you are better to use the memory finder to find the RAM, like this from Crucial http://www.crucial.com/usa/en/compatible-upgrade-for/GIGABYTE/ga-p35c-ds3r And keep in mind like Kingston, they don't have any RAM for the old intel MB.

One more you try update the BIOS to the newer one "F12" ( 2009/06/19 version) by using the old RAM, then switch the new one to see you can cheat the computer or not, because it may work sometime. Otherwise you need to return the 2X4GB then buy the 2X2GB.
 
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kim7tng

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Sep 28, 2017
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My Bios already F12...it is the latest bios, so i cannot update again

2x4GB size is working fine for years, so it should not a problem, maybe as long as the memory is compatible
many people also got 2x4GB on similiar and different type (P35), even though officially only support 4GB total....
2x8GB is different since i not find anyone can get it worked...

thx for the info...
 
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BFG-9000

BFG-9000

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Sep 17, 2016
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Technically, DDR3L RAM is required to be backwards compatible with 1.5v so it does not need to run at 1.35v and it's not DDR3L itself that is the problem.

However, Core 2 chipsets are only compatible with extremely low-density 2Gbit memory chips, so the only 4GB DDR3 modules that will work are the ones with 16 chips on them. What we nowadays consider as low density is the 4Gbit chips that Nehalem to Ivy Bridge require (up to 8GB sticks), and of course high density 8Gbit chips work on any newer Intel and all AMD (16GB sticks with 16 chips).

You have 4GB on 8 chips so 512MB per chip * 8 = 4Gbit per chip, which cannot work on Core 2
 
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Solution
K

kim7tng

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Sep 28, 2017
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510
After 1 week for another waiting, my RAM finnally returned, with the one pair i wanted...
the right DDR3 (non L)
the right 16IC chip memory that had it 8 IC on both sided

one thing i notice is that in bios, the voltage for DDR2/3 is at 1.6V
this one could be the thing that made is wont work, as DDR3L design use lower voltage, although it still support 1.5v, maybe another 0,1v made it incompatible.
and those IC size is really a thing to consider too, if anyone can make their DDR3 4GB 8 IC chips worked on Core2, please let me know

anyway, thank you very much for the info and suggestion gave to me
hope u best of luck always :D
 
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