Here are our recommendations:
- Test the system out of the chassis on a minimal configuration to narrow the issue properly.
- Test with a BIOS recovery test to latest version available:
- Latest BIOS can be downloaded here:
- If the issue still persists we recommend checking your warranty options to replace the board.
thank you for the reply.
I have already done all of that.
- I have already tested the system with the minimum components: processor, memory, motherboard, and 1 hard disk. And yes, even outside the chassis: http://i.imgur.com/hWyPZPw.jpg
Is it minimal enough?
- I have already tried the latest bios. Please read my 1st message again. I tried both with the F7 method and the recovery one. I loaded bios defaults, and I also tried removing the battery overnight.
- I have had the motherboard replaced already. The DH77EB I have now it's even from a different shop.
And I have narrowed the issue. It's the bios. Changing only the bios makes the system to crash, or to reboot, or to be stable (with the mentioned minor issues).
It seems to be some memory compatibility problem. This problem was introduced for the first time on bios version 0062. And on bios 0098 it was again modified. But there's no memory corruption. I have tried to copy a few dozen of GB of files through memory and I haven't had any CRC mismatch.
It seems to me that you are not using a matched 32GB memory kit. If you are buying single DIMMS and mixing them together, there is no guarantee that they will work together.
it is correct. I am using individual memory modules, but just because no shops here were selling kits at the time of purchase.
The modules work together. But only with bios version 0053.
And please notice that I am already using matched modules (using Intel's terms), otherwise according to this document:
"To achieve dual-channel mode, the following conditions must be met:
Same memory size (1 GB, 2 GB, 4 GB, etc.)
Matched DIMM configuration in each channel
Matched in symmetrical memory slots"
If the modules I have were not matched, I would not be able to run the memory in dual channel. But I do. Here's a screenshot of cpu-z:
Now, please point me to an official Intel document which states that it is required to use memory modules from a kit. Any Intel agent can reply too.
You can use 4 sticks of 8GB 1600, 1333 or 1066 MHz of RAM; however it is required that the memory sticks are built based on "Double-sided, 4Gbit SDRAM density"
This means, that the memory sticks have to contain a chip distribution in the two stick sides and each chip has to be made based on 4Gbit density.
For more details about memory construction and specifications on the memory please contact the memory manufacturer and they can give more information
In addition to that, you may want to try a newer BIOS version. You can attempt using BIOS version 0098, then 0099, 100 and finally the latest version 0101.