problems detecting full RAM en HECI

Toine1 wrote: I have the P67 Extreme4 firstGEN & i5-2500k, that after a flash to 3.10 and the beta Bios was complete KO. So I did a reinstal of 2.10 Bios from PCtreiber.net, but richt now I do face lots of problems. 1]. I have installed 4 rams [XPS] but only 2 are been recognized, also no sign of 1600mhz in the bios while normally this was always selectable.  2]. HECI protocol seems to be wrong! I have tried, the 1.5/1.6/1.8 and 2.0 Bios but still no luck, what is wrong, please help me.

You flashed to the version 3.10 UEFI, that adds support for Ivy Bridge processors, while you are using a Sandy Bridge processor. What was the reason for changing to 3.10?

The 3.10 UEFI version updates the CPU microcode to support Ivy Bridge. The CPU microcode is not updated in every UEFI version, so simply installing other UEFI versions will not change the CPU microcode.

You can use the 3.10 UEFI with a Sandy Bridge processor, but the 3.10 UEFI requires other updates.

The download page with the 3.10 UEFI warns you that this version is a special version that adds support for Ivy Bridge processors. You also must update the Intel Management Engine (IME) software after the UEFI update. Did you do that?

http://www.asrock.com/mb/Intel/P67%20Extreme4/?cat=Download&os=BIOS

The link to the IME software on the UEFI page is broken, so you must go to the download page for whatever version of Windows you are using to find it.

Since you installed the 3.10 UEFI, the earlier UEFI versions may not work correctly, even after you install the new IME software. If that happens, you must install 3.10 again. Regardless, you must install the new version of the IME software.

I would also suggest doing a full UEFI/BIOS clear, by using the CMOS clear jumper on the board, and removing the board's battery for at least an hour. But do NOT do this right after a UEFI update! Start the PC into the UEFI at least once, load the UEFI defaults from the Exit screen, and then restart the PC again. After this, you can clear the CMOS and remove the battery.

It sounds like you've done everything else you can do.

What UEFI version do you have installed now? If it is not 3.10, you must install that version.

There's a reason why the earlier UEFI versions have been removed from your board's download page. Once you install 3.10, you can't use previous versions.

It's easy to try the IME software on ASRock's web page for your board. You can always change to another version later.

Another option for you is to buy a new UEFI chip from places like eBay, and use the last UEFI version before 3.10. You can replace the UEFI chip, it is not soldered in the board.

When users have done all the things you have done, installing the 3.10 UEFI, and then installing older UEFI versions, it is common for the result to be what you have now. That is, problems with the UEFI they never had before. The best fix it a new UEFI chip.