Hi All

We are closing ion on a cause for this issue and I need a bit of information from those seeing the flickering. Would it be possible for someone to remove all but one memory stick from their system and see if the behavior changes?

Thanks

Robert

Hi Robert,

Thanks a lot for the input.

I removed one of my two 8gb memory sticks and the problem seems to have gone away. Do you know any solution where both memory sticks can be used?

John

Hi All

This issue is a BIOS issue specifically with the Memory Reference Code (MRC) version 1.4.0.0 or older. Please contact your system or motherboard manufacturer for a system BIOS update for your system or motherboard that includes MRC 1.5.0.0 or newer.

If you have a system with 2 or more memory modules and are comfortable with removing all but one of them so that your memory is in single channel mode, try and remove all but one of them and the issue will go away. This can be used as a workaround until you are able to update your system BIOS from your system or motherboard manufacturer that includes MRC 1.5.0.0 or newer.

Hey all,

Just letting you know that on my system the ASRock beta bios update fixes this. I updated and the flickering went away.

I'd keep checking for updated bios revisions as the intel team suggests.

Andrew

I would recommend everyone still experiencing this issue contact their system / motherboard manufacturer and ask for a BIOS update with MRC 1.5 or newer.

Thanks everyone for your feedback and patience.

Thanks for the information.

is Intel planning on releasing updated bios binaries for their boards soon ?

i have a DZ77BH-55K and for bios version 83 it says   "Memory Reference Code: Based on SA-RC_1.60"  I assume this is higher than 1.5 so it should be fixed in this release ?

(FYI, I still have the issues with that bios version, also release 85)

thanks,

Robert.

Hi Robert

BIOS 85 does have the latest MRC (1.6.0).

Please decsribe exactly the issue you are seeing.

On your system, do you still see the issue when you remove all but one memory module?

Hi Robert,

Thanks for the confirmation.

I just got new dimms. I also had a problem with enabling xmp1600, as it turned out the entire kit of 4 dimms was faulty. Although I never had memory problems running them at 1333 and several memtests86 did not cause issues, the flicker I saw is possibly related to the faulty dimms. I had put my old graphics card back and have not tested it with the newly received dimms yet. I'll try that to see what happens.

Running one dimm now is difficult, my entire system is water cooled. taking out 3 dimms is a lot of work. I'll test with 4x8GB.

I kind of disagree that this issue is entirely related to the memory bios version.  I'm running an Intel DZ77RE-75K with latest version 53 bios (surely it has >v1.5 MRC) and have seen the flickering described in this discussion.  However it is rare, but I do see it from time to time.  I haven't noticed anywhere that might make it happen more frequently.  A couple days ago I upgraded to the latest Intel HD Graphics 4000 drivers that were released.  I'm not certain whether that fixed the issue or not yet.  Anyway, this is not the most annoying problem I find with using Intel HD 4000 graphics actually.  It is a different flickering type issue, but I'll post a new thread on that.

My configuration:

Intel DZ77RE-75K (bios 53)

Intel 3770K

16GB ram (2 x 8GB dual channel)

Windows 7 Ultimate 64bit

HDMI to DVI into monitor at 1920x1200 @ 59hz

I can confirm with Intel DZ77RE-75K (bios 53) and the latest Intel HD Graphics 4000 driver released this month, I am still experiencing flicker.  It is rare, but it still does happen.  It looks like it's a random event happening once every day or two, and I use my computer many hours a day.  After going totally black, the screen recovers after a second or two.   I guess whatever they did in MRC 1.5 didn't totally get rid of it.

I am experiencing the same issue with random flicker once in a while.

3770K Intel HD Graphics 4000 + DisplayPort cable + HP ZR30w 2560x1600.

I am using 2x 8GB memory sticks G.Skill TridentX 2400.

And yes, the problem did not completely go away after a BIOS update.

i also have this issue with a new mac mini 2012 model. this model also has an intel hd 4000 built in.

i have a dual monitor setup. both monitors have a dvi in. the mac has one thunderbolt out and one hdmi out. the random "blackouts" - monitor just goes into standby and back on for a second - (happened twice yesterday) occur on the hdmi connected monitor. at first i thought it is an issue with the hdmi out - but after just using only one monitor on that connection for several hours the problem did not happen again.

so it also may be a driver issue in this case.

there is not much to find about this issue on the internet yet - first the mac mini 2012 model is still very young and also i think not many people have a dual monitor setup with a mac mini.

i wonder if other intel hd 4000 users, or maybe even mac mini 2012 users, have the same issue...

I got the similar issue with my new pc.

ZOTAC Z77-ITX WiFi +3770K i7

Monitor Dell 30'' with 2560x1600 and Dell 24'' with 1920x1200

The issue is still present also I removed one ram stick. One time the monitor just went blank but other times

it get dizzy (see immage https://dl.dropbox.com/u/1045424/Foto0156.jpg)

I'm having this exact same issue on a laptop I purchased from iBuyPower with the Nvidia 680m w/ Optimus and the Intel HD 4000. It happens anytime I use any configuration that involves an external display (it has HDMI and VGA out).

They are looking into getting a BIOS update from MSI, but in the meantime, removing all but one memory DIMM solved the issue.  This is, of course, incredibly frustrating, since I use most of my expanded RAM for a lot of the work I do.

Laptop Build:

Valkyrie CZ-17 17.3" Full HD 1920x1080 LED-Backlit Display

1 x Processor Intel® Core™ i7-3820QM Mobile Processor (4x 2.7GHz/8MB L3 Cache)

1 x Memory 32GB [8GB x 4] 1600MHz DDR3 SDRAM [Laptop Memory] - G.SKILL

1 x Video Card NVIDIA GeForce GTX 680M 4GB GDDR5 Video w/ NVIDIA Optimus [CZ-17]

1 x Primary Hard Drive 180 GB Intel 520 SSD - Single Drive

1 x Data Hard Drive 500 GB 7200rpm Serial-ATA Super Slim Laptop Hard Drive

1 x Optical Drive 8x Dual Format DVD±R/±RW + 16x CD-R/RW Combo Drive [CZ-17]

1 x Flash Media Reader / Writer Built-in 4-in-1 Media Card Reader/Writer [Laptop]

1 x Sound Card HD Audio with THX TrueStudio Pro

1 x Network Card Killer E2200 Gaming Networking

1 x Internal Wireless Network Adapter Intel Ultimate-N 6300 802.11 a/b/g/n 450Mbps Dual-Band Wi-Fi 

A whole bunch of Mac Mini users are reporting intermittent blackouts, primarily using HDMI port.

Random Black Screens - MacRumors Forums