SABERTOOTH 990FX R2.0 (Boot Device LED)

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jimjam2

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Feb 20, 2013
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Hi guys,

I've recently started getting a red LED (solid not flashing) on the SABERTOOTH 990FX R2.0

Weird thing is, it boots fine and I can use the PC without issue - all the other threads I've seen detail that this issue stops their PC from displaying anything.

Any ideas what could be going on? Hoping this isn't a foreshadowing of a problem to come.
 
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jimjam2

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Feb 20, 2013
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Ran a memtest - everything fine on that end of things.
I have overclocked my CPU (24/7 overclock) but I haven't changed the voltage or anything on the RAM modules

Any other ideas?
 
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Kwolf484

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Oct 19, 2014
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Hey, if it is just on boot, and then goes off I wouldn't worry as its 'testing' the bootable components.
Do you/are you able to boot to the OS?

If its steady after boot it could be a couple of things from what I can make out. (I own this board)

In this order I would . . .
(1)What GPU, CPU and PSU are you running? (Brand model and watt of the PSU please.) Report this back asap.
(2)Check all power and data leads are connected securely.
(3)Boot to OS, run drive diagnostics via there (WD data lifeguard has served me well, but others are probably just as good)
(4) Possible try other sata ports, other leads, and other PSU rail to the Boot drive (one with OS on it)

Just to add, be sure to have the boot drive using the non RAID sata ports (one of the two and are a different colour to the other six, towards the bottom of the board/sata port bank)

Would also make sure that the OS drive is first on the Boot priority. (Just for arguments sake)

What CPU cooler are you using and, if any which fan header is it connected to? I read somewhere once that not using the CPU_FAN header can cause false positives. Turning this off in the BIOS will resolve the it.

Resetting CMOS may also be an idea just to rule out dodgy settings, but report back with info from (1) before doing so. No need if you are lacking power.

 
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jimjam2

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Feb 20, 2013
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Okay so CPU, GPU and Powersupply are as follows:

AMD FX-6350 Six Core CPU (4.2/3.9GHZ - 8MB CACHE/AM3+)
3GB NVIDIA GEFORCE GTX 780 Ti
CORSAIR 650W CS SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET

CPU is overclocked (24/7 overclock) to 4.5 GHz but no changes were made to the voltage or anything like that, it's a stable overclock as well.

I should add - the boot device LED only started coming up red recently - a month or so after adding a SSD in for extra storage, my main hard drive (with OS on it) is mechanical and doesn't turn up any errors with a quick chkdsk - my other hard drive from my old PC which I use for storage (also mechanical) has deteriorated performance now but isn't the main boot device.

I will also crack on with the rest of your suggestions as soon as I can, thanks for the replies everyone so far!
 
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Xigmatek

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May 29, 2014
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I'm not sure if you have resolved your issue or not. I'll post some theories.

I've had the same issue as you, suddenly boot device led startet lighting up. Here are some things you can try:
- If you reset the BIOS to default (remove all OC) does the light go off?
- If you keep your OC as-is, but make a small increase in DRAM voltage, System Agent voltage and/or vcore and cache voltage. Does the light go off?

If the light only goes off when you remove all OC then there could be some problems with the pcie lock causing host and client controller being clocked out of spec, resulting in corrupted data.

In my case increasing the DRAM voltage did the trick, even if the system was without any errors for a a long time with the same voltage. Why did I have to do an increase? There could be many reasons for this. 1 reason could be PSU ripple or voltage control. Have you tried with another PSU? Another reason could be small areas of rust on your motherboard. Lets say you have watercooling f.i, and you have spilled some when installing. Of course one would clean this up, but that doesn't necessary mean that it will not rust. You can remove your motherboard and take off all heatsinks. Look for areas of discolour and use a brass brush to carefully clean it. Some times you can't even see the discolour making it really difficult to clean. You could (at own risk) clean the entire motherboard like you would with the dishes: soap, water and a scrub making it easier to remove the area with rust. You would have to remove all heatsinks first, and you would have to bake the motherboard in the oven at about 60°C for some hours. My point being that rust (even if you can't see it) can make small short outs on your motherboard and can cause "strange" behavior.
 
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