Error 99 when DVI connected

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   Just built a new system with the Extreme 7+ Z170 motherboard and my existing Gigabyte GTX 1070.  However, when I plug in my secondary monitor using DVI (it's the only option), the system won't post and the motherboard displays error 99 on the LEDs.  If I unplug the DVI cable to the second monitor, everything boots fine.  I'd been using the 1070 for a month with no problems on my prior system.
Any ideas/suggestions?

Thanks!

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wsoldier Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Aug 2016 Status: Offline Points: 3	Post Options Post Reply Quote wsoldier Report Post Thanks(0) Quote Reply Topic: Error 99 when DVI connected Posted: 03 Aug 2016 at 11:58pm
	Just built a new system with the Extreme 7+ Z170 motherboard and my existing Gigabyte GTX 1070. However, when I plug in my secondary monitor using DVI (it's the only option), the system won't post and the motherboard displays error 99 on the LEDs. If I unplug the DVI cable to the second monitor, everything boots fine. I'd been using the 1070 for a month with no problems on my prior system. Any ideas/suggestions? Thanks!

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply Posted: 04 Aug 2016 at 2:14am
	Two things come to mind here. First being is your PSU, w/o any 4-pin molex adapters in use, natively have an 8-pin motherboard power connector AND also native 6+2 PCIe with which is powering the card itself? Second is, are you running the latest and greatest BIOS, 3.10, just released yesterday on Aug 2 2016? Otherwise, with the above two considerations addressed it may need a BIOS update to accommodate the 1070, which itself isn't unheard of with new video cards.