Why are 8GB DDR3 sticks causing problems?

Videographer

Reputable
Sep 9, 2014
459
0
4,960
Hi

I recently tried to go from 16gb to 32gb DDR3

I had 4x4GB crucial ballistix and it worked great

I tried 4x 8gb Komputerbay and it didn't work out, lots of errors and crashes, couldn't pass memtest86

I then got a cheap stick of 8gb (incase the komputerbay stuff was junk) and had the same issues

Thinking it was just "cheap RAM" I got myself 2x 8GB Kingston Hyper X

Same problems - random boot issues and a failure on memtest86 stage 13 - last time this lead to a corrupted Windows partition so I'm reluctant to pass it off as "just test 13, don't worry it'll be ok"

CPU is 4770
Mobo Gigabyte Z87-HD3

Tried resetting CMOS
Tried changing RAM timings

What is wrong, why is my system rejecting every 8GB stick I throw at it?

(Also I'm not mixing and matching sticks, one stick is enough to cause problems, although the more sticks I use, the more quickly problems occur)
 
Solution
The system supports 8 GB memory modules using 4 Gb memory chips. It is possible that the tested 8 GB memory modules are using higher density 8 Gb memory chips which are not supported.
The CPU with integrated memory controller basically determines what memory types are supported. For the i7-4770 CPU refer to Intel website and download relevant datasheet (for 4th generation desktop CPU's). That datasheet shows what memory types are supported.

Details on what memory chips used on modules are not always readily available for most manufacturers, unfortunately. In this case it requires "Googling" to find details on memory modules.

Most memory manufacturers websites have memory search / memory configurator's where compatible memory can be found for your system. Additionally the motherboard manufacturer has a QVL of compatible memory.

If you provide the manufacturer and part numbers of the 8 GB modules tried so far, compatibility can be double checked.