GA-X79-UD5 system not starting anymore, apparently because of BIOS

sufertashu

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May 23, 2010
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My system was not starting anymore. I made it run again by switching to the other BIOS, but is the BIOS the real problem?

Two years ago I built a system around the GA-X79-UD5 motherboard. No overclocking. It worked fine until this morning when it refused to start: front LED and fans would light/spin for less than a second, then everything stops for a few seconds, then the cycle repeats forever. No beeps, nothing on the screen. I checked the voltage on the cables and all looks fine for the brief moment when it's on.

I tried switching to the other bios (it's dual bios) and then it worked again :). Does this mean one bios is fried or is there a more subtle issue? I wonder how common this is. Can I do anything to prevent this other bios from dying too soon?

As a side note: After making the system boot again, I noticed the memory (1600MHz) was running at 1333MHz. I tried switching it to 1600MHz and noticed Google Chrome is constantly crashing. I assume it's because the turbo mode gets activated and pushes the RAM frequency up (am I right?), so I changed it back to 1333MHz and it appears to be working fine so far.

Mainly I'd like to figure out if it's a fried BIOS or something else. Partly I want to be prepared should this happen again.

The components:
Gigabyte GA-X79-UD5
Intel Core i7-3820 BOX
Corsair DDR3 32768MB (4 x 8192) 1600MHz CL10 Vengeance X79 Quad channel
Gigabyte GeForce GTX 670 2048MB DDR5 OC
Seagate Barracuda 2TB 7200rpm SATA3 64MB
OCZ Vertex 4 2.5 SATA3 128GB
CoolerMaster Silent Pro Gold 800W
CoolerMaster Hyper 412S
 
Solution
Flash the latest BIOS version. If you are already running the latest BIOS, flash that one. A BIOS flash will more times than not rid the bios of problems it developed from crashes and bad shut downs, etc. After a bios flash or even a bios reset, you need to set up the bios starting with setting optimized defaults then the memory timings and speed.

Enabling XMP1 after optimized defaults is usually all you need to do for the memory.
Flash the latest BIOS version. If you are already running the latest BIOS, flash that one. A BIOS flash will more times than not rid the bios of problems it developed from crashes and bad shut downs, etc. After a bios flash or even a bios reset, you need to set up the bios starting with setting optimized defaults then the memory timings and speed.

Enabling XMP1 after optimized defaults is usually all you need to do for the memory.
 
Solution