Unsolved
This post is more than 5 years old
1 Rookie
•
29 Posts
0
8936
April 9th, 2016 14:00
Upgrading Memory In i5 Optiplex 980
I wonder if anybody has ever solved this issue. I have a 980 MT I run 8 x 2 GB memory with no issues. According to specs the machine will handle 4 x 4GB in a 64 bit enviroment. I started out with 4 x 4 of 1600 DDR3 memory that everybody said would work through backwards compatibility. No go. Arrived at BIOS and memory was populated, but machine never booted or completed repairs. It just gave me messages such as Kernel Security Check Failure on the ole BSOD and restarted over and over. I contacted G.Skill and was told I would have to get the 1333 memory, which I did, but still the same issue. It's definitely looking like this just can't be done and apparently others have arrived at the same conclusion, contrary to posted online specs.
Additional info: my CPU is the Intel i5-650 and a look at the Intel site also indicates 16 GB capable of DDR3 1066/1333
I am in the process of maybe answering my own question. Not being a memory expert I have not noticed the distinction between the PC3-10600 4 x 2 GB ram I'm running with no issues in my machine and the memory PC3-1066 memory that the Intel site says this processor will support up to 16 GB. There is apparently a difference, but I'm kind of afraid to try any more new memory that I might have to also find a way to sell. From what I have discovered my existing memory runs at 1333 MHz but the other memory runs at 1066 MHz, so you have to wonder if 16 GB at the lower frequency will make for a more capable machine than 8 GB at the higher frequency. Boy, am I confused.
speedstep
9 Legend
•
47K Posts
1
April 11th, 2016 12:00
1066 and 1333 are too slow.
DDR3 1600 must be used.
Low Density 1.35v
4 gig dimms max size.
1R or 2R not 4R.
DDR3 1066 = (PC3 8500) too slow
DDR3 1333 (PC3 10600) too slow
DDR3 1600 (PC3 12800) This is the REQUIRED Speed for loading 16 Gigs of ram and it must be LOW Density.
DDR3 PC3-12800 • 9-9-9-24 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • 512 Meg x 64 •
Many INTEL Chipsets cannot use 4 rank or 8 rank memory.
They must be low density 1R /2R or they don't work period end.
The term “rank” was created and defined by JEDEC, the memory industry standards group. On a DDR, DDR2, or DDR3 memory module, each rank has a 64-bit wide data bus. In its simplest form, a DIMM with DRAM chips on just one side would contain a single 64-bit chunk of
data and would be called a single- rank (1R) module. DIMMs with chips on both sides often contain at least two 64-bit chunks of data and are referred to as dual-rank (2R) modules. Some DIMMs can have DRAM chips on both sides but are configured so that they contain two 64-bit data chunks on each side—four in total—and are referred to as quad-rank (4R) modules.
vxbush
1 Message
0
August 16th, 2016 09:00
Following up on this:
I tried to install four 4-GB DDR3L-1600 UDIMM modules, and the machine left the 3 and 4 LED lights up, indicating an error message. SpeedStep, if you're still around, why can I not use these?