Heyya fellas!
I'm rocking an asus MSAL87L with FX9590 with 2 4gb DIMMs. It's old hardware that I use as a server. I have an issue where it'll only boot after a CMOS reset. Otherwise, it won't post. I can enter the bios and set things up, then I get one boot from there. Which isn't so bad seeing as I use it as a server. But it's still kind of annoying to have to do whenever I do reboot. Everything seems to basically work fine apart from that.
The Bios settings are largely default, with only one HDD plugged in in AHCI mode with SMART enabled. I've reseated the bios chip and replaced the cmos battery. Any theories on what's up?
Cheers guys :)
EDIT: Turned out to be a power delivery issue as identified by @MisteryAngel. I got around the issue by tweaking my already underclocked 9590 to a very modest 2.6GHz at 1.25v. This is ultra-safe for the time being while I check system stability. But it now consitantly boots. Thanks for all of your suggestions :)
1 Like
Try unhooking the power and reset wires from the motherboard. The ones that go to the case. Then turn it on by jumping the pins.
I had one that did this and it was a bad button stuck in position.
Can not hurt to try. Unconnect all but the essentials and try.
When it fails to boot, what happens? Is there any power to your other components (fans, HDDs)?
How many beeps do you hear when the system attempts to boot?
Hmmz one thing that worries me the most here is a FX9590 on that motherboard.
Your particular motherboard is not really designed for that powerhungry chip.
And officially doesnt support it.
The vrm of the motherboard isnt good enough for this chip.
This might be the cause of your issue.
Wenn you reset the cmos, all settings will go back to factory defaults.
As soon as your system is booted up, and the cpu is put under stress,
it will cause the vrm mosfets to run pretty hot (overheating), and most likely some massive vdroops.
I´m exally suprised that the board didnt burn out yet.
Updating the bios as @Dje4321 might be worth a shot.
But i would personally advice to go into the bios and downclock the cpu.
To something like 4.0GHz / 4.2GHz ish or something similar.
The CPU is actually running at 4.0GHz and 1.35V to reduce the noise level. I didn't even think about the mosfets. But I guess it's just as well I did that!
@SLOWION When it fails to boot, the fans spin up as normal, but the whole system shuts itself down after about a minute of it's own accord if I don't do so first.
Is there any HDD activity like it's made it past POST or is it just spinning fans then shutting down?
As far as I can tell, no. The vibes I'm getting from the system tell me its not posting. Though I have limited information to work with. I have no HDD activity light, so my diagnosis consists of placing my hand on the HDD and trying to decipher whether the vibrations I'm feeling are from it or the case fan.
No problem, glad i could help.
I'm not fully sure if buying a new motherboard for your cpu would be really worth it.
The FX9590 is not really a very efficient cpu,
and it needs a motherboard with a very good vrm circuitry on it.
I could eventually give you a few tips for a couple of boards,
that i think should have a decent enough vrm for that cpu.
However those boards arent that cheap.
1 Like
I have a sabertooth fx990 which it was installed on previously. I moved it to a smaller board that I had spare for the sake of portability. But I've never bothered to swap it back over as I don't really need single threaded performance for anything. The fx CPUs make really great cheap servers :D
Well then i would say maybe concider swapping it back.
The Sabertooth has a more adequate vrm implementation.