CMOS POST FF(h?) on CMOS display.

Gigabyte / 990fxa-ud7
March 5, 2012 at 01:57:27
Specs: Windows 7, AMD Phenom II X4 925 2.8 GHz
My MO-BO is a Gigabyte 990FXA-UD7, and I've noticed the CMOS display is showing FF. If there is a 'h' after, it's blocked by my graphics card.

The MO-BO manual states that FF or FFh is "Boot attempt (INT 19h). It doesn't explain what that means.

Cheers, In advance =)

Now, this board has an onboard Reset Switch (RST_SW) and CMOS Switch (CMOS_SW). The manual says the latter clears CMOS values.

So, what does 'FF' means exactly, what could have caused it, and does it have any negative effects on performance?

AMD Phenom II X4 925 2.8 GHz (Quad Core)
2 x 4GB Corsair Vengeance
2 x Gigabyte HD6870 OC

See More: CMOS POST FF(h?) on CMOS display.

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March 5, 2012 at 02:25:45
FF is related to 2b and appears to be graphics card related, this was taken from a web page:

When the system powers on and the Debug LED shows the usual POST code sequence but hangs on 2b or you get a beep code as soon as the sequence reaches 2b, then the Mainboard cant detect your Videocard properly. Note that the POST code sequence might not halt at 2b but continue, so the final POST Code it displays could be FF, 00 or 7F which means the Maiboard booted, entered BIOS, or OC recovery kicked in and is waiting for Input to enter BIOS.

Since the Videocard couldnt be detected properly you will only see a black Monitor and either 2b, FF, 00 or 7F. Check if there is something wrong with the Videocard, the PCIE slot or BUS, the Monitor or monitor cable. Turn the Monitor on and off, switch the Monitor cable from one D-SUB or DVI plug to the other in case your Videocard has two. If this doesnt help then reboot and load the optimized defaults. If that doesnt help either try another Videocard if possible, or try the Videocard in another system to make sure its working properly.

Try another monitor or try the Monitor on another System."

Googling is quicker than waiting for an answer....

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March 5, 2012 at 13:43:36
As soon as I get home from work this afternoon, I'll try that. But currently, my LCD screen is plugged into the top-most DVI port of the Top Most graphics card in PCI-E x16_1. The second card is in PCI-E x16_2.

Monitor still works fine. I'm using it now.

Cheers for the reply mate.

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