Z77 Extreme4-M - Memory Issue
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=13428
Printed Date: 19 Jul 2025 at 3:56pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z77 Extreme4-M - Memory Issue
Posted By: parisisal
Subject: Z77 Extreme4-M - Memory Issue
Date Posted: 13 Jan 2020 at 12:41am
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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 ? |
Replies:
Posted By: parisisal
Date Posted: 16 Apr 2020 at 4:35pm
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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?? |