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cannot use integrated HDMI X670 crosshair hero

bwana
Level 10

4090, X670hero, 7800x3D works fine. The 4090 is driving 4 displays with the latest Nvidia drivers without problems.

Plugging in a display into the HDMI port on the motherboard results in no display on any monitor. Post codes indicate that the boot sequence completes normally. What do I need to do to fix this?

Intel 3770K 4.4ghz, 1.24v. . . . . . . . . . . . . .Intel 4930k 4.7ghz 1.37v........AMD 7800x3D async 104
32 gGSkill DR3Trident 2400mhz 1.65v. . . .32 g 1866 Vengeance Pro.......64 g Hynix 6200
ASUS M5G. Noctua D14. . . . . . . . . . . . . . . H110. Noctua A14x4.............Arctic 420
prime95 stable 78degrees. . . . . . . . . . . . . IBT 75 degrees
OCZ V4 OS. . . . . . . . . . . . . . . . . . . . . . . . . EVO 1TB...............................WDSN850x 2TB
Seasonic 700w. . . . . . . . . . . . . . . . . . . . . .1200AX.................................HX1200i
All tucked into Lian Li A05. . . . . . . . . . . . . .Fractal Midiv2......................BeQuiet802
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bwana
Level 10

However, if I plug the 5th monitor in AFTER boot to windows, it works. What do I need to do to fix this so that the pc can boot with the hdmi connected?

Intel 3770K 4.4ghz, 1.24v. . . . . . . . . . . . . .Intel 4930k 4.7ghz 1.37v........AMD 7800x3D async 104
32 gGSkill DR3Trident 2400mhz 1.65v. . . .32 g 1866 Vengeance Pro.......64 g Hynix 6200
ASUS M5G. Noctua D14. . . . . . . . . . . . . . . H110. Noctua A14x4.............Arctic 420
prime95 stable 78degrees. . . . . . . . . . . . . IBT 75 degrees
OCZ V4 OS. . . . . . . . . . . . . . . . . . . . . . . . . EVO 1TB...............................WDSN850x 2TB
Seasonic 700w. . . . . . . . . . . . . . . . . . . . . .1200AX.................................HX1200i
All tucked into Lian Li A05. . . . . . . . . . . . . .Fractal Midiv2......................BeQuiet802