Windows 7 Home Premium support only 16GB RAM by design (on 64-Bit only).
Windows 7 Professional support 192GB Ram (On 64-Bit).
I believe that your problem is related to Bios. In the past couple of months Intel released Bios Updates for a variety of Its Desktop Boards (5-Series and 6-Series ones), to fix memory slow boot problems when memory installed where above 8GB.
I suggest that you wait for mainstream 8GB memory (not gamming ones) to test with your board.
I am having the same board with you but with 2*4GB Ram installed, but this comming weekend i am installing another 2*4GB pair just to top 16GB.
I dont have any 8GB modules to test for you sorry, but i read elsewhere in these forums that when you are occuping all 4 memory slot you have to lower the memory frequency in order to give the memory controller "some room" to breath. (Example from 1600MHz to 1333Ghz).
I would suggesting that you lower your frequency from 1333MHz to 1066MHz just to test your boot-up process.
A littlle update on the problem.
- Occupying all 4 memory slots with 4x4GB modules = OK
- 2x8GB Modules = OK
- 4x8GB Modules = FAIL!
- Bios 2040 will not boot with more than 16GB installed. (Error 27 on Mainboard)
- Bios 2053 has been pulled so i guess it was full of bugs, however this BIOS does not give error 27 at boot and bios does report 32GB installed memory.
But it will be slooooow as hell but only when running Win7 Professional.
- BIOS 2053, Win7 Home Premium will boot with 32GB as fast and normal as with 16GB, but because of the OS limitations it will of course not read or access more than 16GB.
- Setting the memory speed to 1066 had no effect.
- BIOS 2023 will not even boot with 16GB, tested both 4x4GB and 2X8GB
I am quite certain now that this must be a BIOS problem....Is Intels 32GB spec on the mainboard just Theoretical or have they really really tested it with 32GB in real life? I guess i have to wait for a newer BIOS, in the meantime it would be great to know if intel has some official info about this problem!
Did you ever get this sorted?
I have since upgraded to bios version 2076, with no apparent fix?!
I have 4x8G (32G) sticks which work perfectly well if only 2x8G (16G) are in.
I would not recommend the DP67BG board while it's still a beta product.
If there is someone at Intel who is reading this, please provide a fix.
The complete lack of transparent support (no online support for this, no email support, and you are directed to a mail address - who uses post anymore?) - does not instill a great sense of customer satisfaction.
BIOS 2111 was released today. One of the fixes is related to 32 GB of RAM.
Fixed issue where SMI Lock bit may set before BSP/AP sync in S3 boot path.
Added workaround for system hangs and blue screen errors during high USB usage.
Restored HPET setup option.
Updated F7 hotkey behavior.
Fixed issue where operating system boots slowly when 32GB memory is installed.
Fixed issue where some USB optical drives cannot be detected.
Updated RAID option ROM to v10.8.0.1303.