Hi,
I have a wired situation and wanna some help to understand what happened from you experienced experts here. I have assembled a new PC on ASUS Prime X299 Deluxe II with both GT1030 in slot 1 and TITAN RTX in slot 2 (my CPU supports up to 44 PCIE lanes). During the first time starting the PC and installing Windows, the only monitor was connected to GT1030 via HDMI. Things turned out smoothly.
Yesterday, I switched the only monitor to RTX TITAN. When I booted, the screen didn't light up for a while. When it finally lighted up, it was already showing the login page of Windows 10. So I missed the whole POST screen. The RTX works fine, as it passed stress test.
And if I booted with GT1030 connected to monitor, I can see both POST and Windows screen. And if I switched monitor from GT to RTX after entering Windows, it also switches smoothly.
I want to understand why the RTX has no output during POST:
UPDATE: It's solved by disabling CSM under Boot options in BIOS, to enforce UEFI boot. With that said, the OS should be installed in UEFI mode (e.g. GPT partition for Windows 10 disk).
I have a wired situation and wanna some help to understand what happened from you experienced experts here. I have assembled a new PC on ASUS Prime X299 Deluxe II with both GT1030 in slot 1 and TITAN RTX in slot 2 (my CPU supports up to 44 PCIE lanes). During the first time starting the PC and installing Windows, the only monitor was connected to GT1030 via HDMI. Things turned out smoothly.
Yesterday, I switched the only monitor to RTX TITAN. When I booted, the screen didn't light up for a while. When it finally lighted up, it was already showing the login page of Windows 10. So I missed the whole POST screen. The RTX works fine, as it passed stress test.
And if I booted with GT1030 connected to monitor, I can see both POST and Windows screen. And if I switched monitor from GT to RTX after entering Windows, it also switches smoothly.
I want to understand why the RTX has no output during POST:
- Is it because RTX is in the second slot? I cannot put it in slot 1 as the backplate touches CPU heatsink. GT1030 is low profile card and can sit nicely there.
- Is it because the BIOS or UEFI record GT1030 for display output during the first time booting, so the system only looks for monitor on GT1030?
- Can I somehow make the PC to automatically figure out the display regardless which GPU the monitor is connected to, so that I can see the POST screen?
UPDATE: It's solved by disabling CSM under Boot options in BIOS, to enforce UEFI boot. With that said, the OS should be installed in UEFI mode (e.g. GPT partition for Windows 10 disk).
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