Question Can the Optiplex 390 motherboard desktop fit 32gb of RAM?

[angwww]

Hello everyone
Hi everyone i saw some posts that found that 16gb ram or two sticks of 8gb worked on the motherboard for the Optiplex 390 but I'm wondering if it's possible to use 32gb with two 16gb sticks found on PC part picker. I won't really be able to upgrade the PC anytime so soon, so I'm wondering if i should just upgrade RAM as want to use it for other things as well.
have a 8gb ram, 500gb SSD with 500gb HDD, 760 GTX, i5 2400

 

[punkncat]

Not sure on this one. There may be a Service Code sticker on it that you can look on the Dell website for support about, or try and find a cut sheet with the information.

 

[BFG-9000]

Short answer is no.

The memory controller in Sandy and Ivy Bridge CPUs can only handle 8GB sticks, so you would need a motherboard with 4 slots to reach 32GB.

And Dell themselves only support up to 8GB total so while 16GB may well work, it is untested

 

[Bob.B]

Hello everyone
Hi everyone i saw some posts that found that 16gb ram or two sticks of 8gb worked on the motherboard for the Optiplex 390 but I'm wondering if it's possible to use 32gb with two 16gb sticks found on PC part picker. I won't really be able to upgrade the PC anytime so soon, so I'm wondering if i should just upgrade RAM as want to use it for other things as well.
have a 8gb ram, 500gb SSD with 500gb HDD, 760 GTX, i5 2400

Go here and run the scanner see what it shows.
Crucial

 

[angwww]

Go here and run the scanner see what it shows.
Crucial

I ran it and it says 8gb is the maximum memory, however other 390 users have found the 8x2 16gb total works so that's why I'm wondering if 32gb will work. Apparently 32gb is the maximum for the CPU I think I can't really upgrade to a new computer anytime soon

 

[angwww]

Short answer is no.

The memory controller in Sandy and Ivy Bridge CPUs can only handle 8GB sticks, so you would need a motherboard with 4 slots to reach 32GB.

And Dell themselves only support up to 8GB total so while 16GB may well work, it is untested

What would happen if someone were to try two 16gb sticks, it just wouldn't boot? And yeah I feel like I would have seen someone try a two 16gb sticks and say if it worked but I haven't seen it

 

[thestryker]

Desktop and HEDT systems that run DDR3 will not support 16GB DIMMs in the vast majority of circumstances. On the HEDT side it was basically one specific DRAM that worked and only on beta BIOS on some systems.

 

[BFG-9000]

Normally the 16GB sticks would either be seen as 8GB sticks or not seen at all.

Sandy and Ivy Bridge memory controllers can only understand up to 4GBit chips, so sixteen 4Gbit chips is 64Gbits or 8GB. Depending on how the chips are internally arranged, the memory controller may be able to recognize and use half of the capacity but no more. This was fixed with the Haswell memory controller, which can see the full DDR3 high-density standard of 8Gbit chips on up to 16GB sticks.

What this also tells you is only low-density 8GB sticks with 16 chips on them will work correctly on your motherboard. 8 chips will not work as they would also be high-density