https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 06 Apr 2026 01:55:07 +0000 Thu, 16 Apr 2020 16:35:18 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=13428 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=13428&PID=74380&title=z77-extreme4m-memory-issue#74380 Author: parisisal
Subject: 13428
Posted: 16 Apr 2020 at 4:35pm

I bought a new PSU : not worked! Same problem.

Finally I bougth a new bios chip from ebay. I changed the bios chip and it worked!
Now I can see all the bios option, and now I can use 4 modules together.
Just 10??]]> Thu, 16 Apr 2020 16:35:18 +0000 https://forum.asrock.com/forum_posts.asp?TID=13428&PID=74380&title=z77-extreme4m-memory-issue#74380 https://forum.asrock.com/forum_posts.asp?TID=13428&PID=71968&title=z77-extreme4m-memory-issue#71968 Author: parisisal
Subject: 13428
Posted: 13 Jan 2020 at 12:41am

Hi all,
Hi have this configuration since 2012, and it has always worked well and it was very very stable :

- ASRock 1155 Z77 Extreme4-M
- CORSAIR DDR3 16Gb (4X4GB) 2133MHz CL11 Vengeance Red (CMZ16GX3M4X2133C11R)
- VGA GTX 1060 6GB (installed on 2018)
- Intel 1155 i7-2700k Ci7 Box (3,5GHz)
- LC POWER 650W OZEANOS 140MM PFC 80PLUS V2.3 (LC8650II)
- Dissipatore NH-U12S (installed on 2016)

Yesterday I found the PC in a strange state : video signal off, keyboard and mouse off but led and fan on. I forced the reboot, and in Windows I noticed that only 8gb has been recognized by the system (16gb installed).

In the bios I see this:



But in the system browser a I see all 4 memory modules :



So i did some tests :

If I install 2 modules in slot1 and slot3 : Ok (8gb recognized)
If I install 2 modules in slot2 and slot4 : Ok (8gb recognized)

I did some memory test with this configurations:

Module1 and Module2 on Slot1 and Slot3 : OK (2h memory test)
Module1 and Module2 on Slot2 and Slot4 : OK (2h memory test)
Module3 and Module4 on Slot1 and Slot3 : OK (2h memory test)
Module3 and Module4 on Slot1 and Slot3 : OK (2h memory test)

Instead if I test all the 4 module together, only 8Gb were recognized and I get many memory errors:



I also tried this :
- Clear CMOS (5 times)
- Remove CMOS battery
- Remove all SATA device
- Remove all USB device

But nothig changed.

I also tried to remove the VGA Card, but I can't see anything from the onboard card (no video signal) : it disappeared.



Could someone help me understand the problem ?

]]> Mon, 13 Jan 2020 00:41:07 +0000 https://forum.asrock.com/forum_posts.asp?TID=13428&PID=71968&title=z77-extreme4m-memory-issue#71968