Slow Boot with CPU debug LED

[mrmachew]

Just completed a new build, when I initially boot the machine each time the CPU debug led on the motherboard lights up, then after about 5-10 seconds the light goes away (sometimes it happens a second time), the VGA LED lights up quickly and the computer boots as normal. In task manager the last BIOS time is currently listed at 17.2 seconds which is pretty long. Then once booted everything runs absolutely fine. 

 

PC:

- Windows 10 Home Version: 1903 64 Bit

 

- Ryzen 7 3700X

- MSI Gaming Pro Carbon AC B450 (updated BIOS to 7B85v1A)

- Hyper X 32gb (2x16GB) Ram 3200Mhz

- Zotac Gaming GTX 1660

- Sabrent Rocket 512GB M.2 SSD

- Corsair Vengeance Silver 750W PSU

 

Thanks in advance for any help!

 

[jGD]

I did my build with the 3800X, and the MSI MPG Gaming Edge Wifi X570. My standard BIOS time is 19.7ish. At 17.2 I'd be even more thrilled. Check out my signature for the rest of my build, but I think 17.2 is a fantastic speed. 

 

Also the debug lights are part of the POST process, and my board does exactly the same thing as yours, only mine seems to take a bit longer, even though my 3800X is OC'd to 4.4 GHz. I will occasionaly have even longer POST processes after I've changed BIOS settings while I'm tweaking fan curves or attempting higher overclocks. 

[mrmachew]

7 hours ago, jGD said:

I did my build with the 3800X, and the MSI MPG Gaming Edge Wifi X570. My standard BIOS time is 19.7ish. At 17.2 I'd be even more thrilled. Check out my signature for the rest of my build, but I think 17.2 is a fantastic speed. 

 

Also the debug lights are part of the POST process, and my board does exactly the same thing as yours, only mine seems to take a bit longer, even though my 3800X is OC'd to 4.4 GHz. I will occasionaly have even longer POST processes after I've changed BIOS settings while I'm tweaking fan curves or attempting higher overclocks. 

Don't think it is normal for the BIOS post to take that long though, I think it should be below 10 seconds at least?

[jGD]

You have a good point... I never really questioned that speed because it was so much faster than my last gen hardware... used to take me nearly 2 minutes to boot all the way to the desktop. Did a bit of googling and looks like 10 or less is normal. Here's a few things to try to speed up BIOS time. I haven't tried them yet, but I will this afternoon, and write back here to let you know about whether it works for me or not.

 

• You can stop your PC from showing a logo during bootup. However, it may only save 0.2-0.3 seconds.
• Adjusting the boot order is another method to decrease the Last BIOS Time. If your PC checks for 4-5 seconds to boot from a network device, you need to disable network boot from the UEFI firmware settings.
• If your Windows PC performs a memory test–or some other test–at each boot, you can disable it to decrease your Last BIOS Time.
• You also have the option to disable PS/2 port if you only use USB devices.
• Just in case you are using very old and outdated hardware/operating system, upgrading it is the only option to achieve a fast bootup time.

From : https://fossbytes.com/what-is-last-bios-time-how-to-change-make-pc-boot-faster/

[mrmachew]

1 hour ago, jGD said:

You have a good point... I never really questioned that speed because it was so much faster than my last gen hardware... used to take me nearly 2 minutes to boot all the way to the desktop. Did a bit of googling and looks like 10 or less is normal. Here's a few things to try to speed up BIOS time. I haven't tried them yet, but I will this afternoon, and write back here to let you know about whether it works for me or not.

 

• You can stop your PC from showing a logo during bootup. However, it may only save 0.2-0.3 seconds.
• Adjusting the boot order is another method to decrease the Last BIOS Time. If your PC checks for 4-5 seconds to boot from a network device, you need to disable network boot from the UEFI firmware settings.
• If your Windows PC performs a memory test–or some other test–at each boot, you can disable it to decrease your Last BIOS Time.
• You also have the option to disable PS/2 port if you only use USB devices.
• Just in case you are using very old and outdated hardware/operating system, upgrading it is the only option to achieve a fast bootup time.

From : https://fossbytes.com/what-is-last-bios-time-how-to-change-make-pc-boot-faster/

I've checked the boot order as well as looking for any tests running, none as far as I can see. My main concern is why the CPU debug LED is on for so long?

[mrmachew]

Anyone got any other ideas?

[jGD]

On 10/22/2019 at 7:02 AM, mrmachew said:

Anyone got any other ideas?

I just got a hold of MSI's AGESA 1.0.0.4 BIOS update last night, and it came with boot speed optimizations. Got a 20% increase in boot speed. Previously got 19.8 for last bios time. First run after update was 14.0, and now, with all my settings added back in I hit 15.7 seconds each time without fail. I know it's not a lot, but I think it shows that the motherboard and bios itself has a ton to do with how fast your system boots. I think my time is 0.3 seconds faster than their published example. Not much, but if that's what the manufacturer reports, then I can't really expect to be sub 10 seconds for last bios time.