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i3750K + GA-Z77X-UD3H + HD4000 issues with system stability and flickering at stock speeds - Page 4

post #31 of 34
Thanks for adding to this discussion h3r1t4g3 with your experience.

Which BIOS version are you using?

Apparently this seems to be a bug in the Gigabyte BIOS. Intel found in some code called the Memory Reference Code (MRC) and all board manufacturers were supposed to update the MRC version to 1.5.0.0.

I opened a ticket with Gigabyte support asking them to confirm that MRC 1.5.0.0 is included in the F18 BIOS. First they said that it was actually included already but I didn't believe them and contacted their Taiwan office for clarification. They have yet to get back to me about this.

Can you check to see if you still have the issue with only one stick of RAM in your board? If the issue goes away this would confirm that this is indeed the issue that you're facing.

From Intel:

"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."
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2013 Rig
(13 items)
 
2012 Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
i5 2500K 4.8GHz @ 1.34v ASRock P67 Extreme4 B3 XFX Radeon HD 6850 1GB 8GB DDR3 1600 MHz CL8 
Hard DriveOptical DriveCoolingOS
Crucial C300 128GB + 3x 1TB Spinpoint F3 RAID0 2x ASUS 24x DVD+-RW/DL Noctua NH-D14 Windows 7 Pro x64 SP1 
MonitorPowerCaseAudio
Viewsonic 24" LED SeaSonic X650 Gold Cooler Master HAF X Onboard HD 
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post #32 of 34
Thank you for welcoming me, GasMan320. I have disconnected one of the RipJawsX RAM from its socket. I am now currently running off of 4 GB of RAM in only 1 socket. The problem seemed to have disappeared. So this very well sounds like a BIOS update including MRC version 1.5.0.0 could fix this issue. I wonder how long we will have to cope like this? I will update later on this evening to ensure all is going well.

EDIT: I walked away from my computer after having no issues for 2 hours. My computer went into sleep mode, and when i refreshed the screen the flickering came back.
Edited by h3r1t4g3 - 2/1/13 at 9:51am
post #33 of 34
Hello once again. I have finally fixed the issue after 2 days. I currently have both of my RAM sticks in and have suffered from no flickers. The method i used was updating my BIOS to the beta BIOS f19e. Since then the problem has completely dissolved.
post #34 of 34
Thread Starter 
Recieved my 3rd RMA PSU from OCZ. Only tested it out for a few hours but it seems to work well. So far i haven't experienced any screen flicker either. Perhaps the MB is picky with its power source? If you've got an extra pop it in and give it a go. I'll give an update if anything changes.
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