Hello evga people! I hope some one here can help me with my problem. I recently bought a new evga z97 ftw motherboard and have updated the bios to 1.07. The problem that I'am having is my computer keep randomly freezing. The mouse starts lagging really bad followed by a sound that hangs my computer, so bad that I have to force a shutdown by holding down the power button. All the bios and software are at default setting. I don't overclock and I have double check all of the connections. Down at the bottom are the hardware that I have on my computer.
 
Evga z97 ftw Motherboard
Evga 780 GTX 
Evga Power Supply 750W
Samsung ssd 840 Evo
Corsair Dominator Platinum 2133mhz 8GB
Corsair h75
Intel 4790k CPU
Corsair Vengeance M65 Mouse
Logitech illuminated keyboard
NZXT s340 Tower
3 Corsair sp120 fan
2 Regular Hard Drive

The bios 1.06 also behave the same way on both window 7 and window 8.1. To answear your question, no I have not found any solution for it.

I have install all the latest driver for all the hardware. The computer will boot-up to window, but freezes in random time. It can take half a day to 2 hours. I tried to recreate what I was doing when it happen, but to no avail. The problem still occur even from a fresh installed operating system with just the drivers. My evga 780 gtx video card runs at 68 Degree on full load, so I know that's not the problem. The only thing I change was the motherboard. At first I couldn't even get into bios because I found out that having a Sound Blaster Recon3D PCIe installed on any of the pcie slot will just cause a black screen. By the way which memory slots do you guys put the memory in? the red slots or the black slots? I only have 2 memory stick for duel channel.

Have you tried running memtest to start ruling out components?  Try running the intel processor diagnostic tool among other things to start narrowing down the suspects.

I have tested each memory it's not the memory, or the cpu. any other suggestion?

Sajin
When running memtest make sure you test each stick individually.

+1....that's really important, OP. Also, do you have a setting under the usb config in the mobo bios to disable/enable legacy usb? If so, tick it to the opposite that its set to now, save and then reboot and see if that changes anything.

problem solved? please let me know. I have Z97 Classified, so for which bios I must to change ? also 1.04 ?

Makaveli24
ever since I downgraded the bios to 1.04 I haven't had any issue. I tested it the whole day without any freezing, so I decided to put back the Sound Blaster Recon3D PCIe card. at first I couldn't get a sound, so I went into bios and disable m.2 under advance/pcie this did the trick. today I decided to run the memory at 2133mhz, so far so good I will update this tread if problem comes back. thank you for all the suggestion and the bios!

I_Pankowski
So I must go back to 1.04 ? where can I download bios 1.04 to Z97 Classified ? 
Thanks

Looks like 1.05 is the earliest available on the forums for download. You can get it here.

What power supply are you using?  Seeing that you are having the same problem with a second board makes me think that something else is the issue.

I agree although I haven't had any problem with the bios 1.04. There is something wrong with 1.06 and 1.07. I hope that evga investigate these issues and come out with a more stable bios.

PS test tool is worthless.  Put it on a digital multimeter and put the system under load and see what the rails are reading.

Had the same problem with 1.06 and 1.07. Currently using 1.04 with no freezes, the only issue is on a cold boot, the system powers off, and requires the second push of the power button. Weird.

ok now I'am getting random blue screen crashes running on window 7 sp1 home fully updated I still have the same hardware minus the sound card.