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Are BIOS updates generally cumulative?

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gingerbee said:
I have never found bios updates to take that long when doing them from the Bios, do they take a really long time when using bios flashback, what's up with the many reboots, I only normally get one reboot to update the led controller chip/s for any boards I use, IE mostly Asus/Gigabyte/MSI
Click to expand...
It's not real long in my case anyway.

I'd say maybe around 5-10 min in BIOS Flashback mode, watching just the flashing light on the back of the IO panel.

Then when that was done I had several power up, switch off, cycles, not going all the way to OS.

Then a few power ups that had messages on screen saying updating MW and then updating BIOS. Then after those it was dones.

I'd guess the whole thing took perhaps 15 min? I didn't time it, just guessing. It felt like a long 15 min though... hoping the PC came back up! ;)

Pleased with the results though. Does appear turning rebar on boosted my performance 3-5 FPS in some games. Not tonnes but any free performance is great!
 
Flashback is longer, because another onboard cpu is doing the job with limited ressources (so that you can update the board without ram / cpu).

Flashback is when you need to update bios to support your new cpu, but you don't have an old one. Or when you flash a beta / new bios and something goes wrong.

Like coach said, update from the UEFI utility is faster.
 
Ya, I was going to say my in BIOS firmware flash take max 5 mins but it does make sense there is a very low-power single core of some type on board that is just a guess cause I have never looked into how they do it.
 
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Right. I figured, based on the stuff @JD had explained, and since I was doing such a big jump in versions, that the Flashback would have been the most "complete" way to update.
 
As per the original question - while I haven't seen it very often, and have only seen it on older boards, I HAVE run across it a couple of times, where, if you look at the notes for various available BIOSes, between the one that's already on the board, and the latest, there have occasionally been blurbs that say you have to update to "x" or "y" BIOS before you can update to "z" BIOS.
 
Cannon Fodder said:
As per the original question - while I haven't seen it very often, and have only seen it on older boards, I HAVE run across it a couple of times, where, if you look at the notes for various available BIOSes, between the one that's already on the board, and the latest, there have occasionally been blurbs that say you have to update to "x" or "y" BIOS before you can update to "z" BIOS.
Click to expand...

The only time I can remember seeing those kinds of restrictions was when they were adding a major feature (like Lysrin was doing :) ) that wasn't originally planned for the chipset. The most annoying version of this was the steps involved in updating from standard BIOS versions to UEFI (Z68?) which always felt like the bad old days of worrying about a bios update bricking your motherboard.
 
My updates off my old X58 bios were hart breaking almost. My newer boards are much less scary.
 
Last edited:
sswilson said:
The only time I can remember seeing those kinds of restrictions was when they were adding a major feature (like Lysrin was doing :) ) that wasn't originally planned for the chipset.
Click to expand...
I am really surprised you haven't seen it much more cause every B350/B450 board I have in the house has at least 2 of those damn bios in the list for when you update ( maybe its a gigabyte thing ) It happens more often when AMD bios chips were too small so they would drop support for some lower end chips or you would have to use a special firmware flash tool to make sure you could keep using all your RAM slots like I had to use on my B350 boards from gigabyte, I have never seen it with any of my bios that added in rebar, which I have running on all my PC's that support it
 
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