What is wrong with my PC?

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Legend

Soldato
Joined
31 Dec 2006
Posts
7,224
This is REALLY starting to get on my nerves now, and I have no idea or indication what the problem is.

I have an Asus X99-S, 5820K (OC'd @ 4.4), 16GB RAM, running windows 8.1.

My system will randomly refuse to boot, and get stuck on the Asus logo. Sometimes this will happen once, sometimes half a dozen times in a row, and sometimes the system boots up just fine... there is no pattern to it. However, on occasion I will get a 'Preparing Automatic Repair' message appear below the Asus logo, but that just gets stuck there also. This would appear to be in the Windows style font, so does that indicate I have a fault with Windows somewhere?

I thought it might be an X99 bug, or a BIOS issue, but it is happening since I updated that. It also occurred to me that it could be an overclock error, but it never says my OC has failed, and within windows everything runs fine, stable in AIDA64 etc.

Should I format my drive and re-install windows? PITA to do, but I really have no idea what's going on here! :confused:
 
snips86x said:
Does it do the same if you remove the overclock?
Click to expand...

Yes, forgot to mention that, it does... although it's random anyway, doesn't happen every time I turn on my system. Happened first time I installed the latest BIOS, and that completely wiped my OC profile.

I did get an OC failed message once or twice when I first started playing around with the overclock settings, but once I got it stable (it seemed anyway), I've never seen that since.
 
I have heard of X99 having certain USB issues, and I tried booting up with JUST my keyboard mouse attached, and it still happened. Before I updated the BIOS my keyboard would randomly fail in Windows. Hasn't happened since, but it was random anyway, so fingers crossed! I read that was something to do with the microcode driving the USB on X99.
 
Generally assuming it isn't a hardware fault like a failing capacitor, etc. that kind of problem is usually due to either not enough CPU voltage or not enough IMC/VTT/system agent (depending on what your board/RAM generation calls it). Not really sure what the deal is with DDR4 and 16GB in that regard though - gonna have to get my hands on a setup to play with sometime.
 
Rroff said:
Generally assuming it isn't a hardware fault like a failing capacitor, etc. that kind of problem is usually due to either not enough CPU voltage or not enough IMC/VTT/system agent (depending on what your board/RAM generation calls it). Not really sure what the deal is with DDR4 and 16GB in that regard though - gonna have to get my hands on a setup to play with sometime.
Click to expand...

Is that something in the BIOS I need to tinker with? My CPU voltage is just over 1.3, and the other one that matters (can't recall the name) is 0.9 something. I have not heard of "IMC/VTT/system agent" before... what's that?
 
Mariusz said:
+1 had same problem and it was powersupply.

OP, what powersupply have you got? Is it possible for you to use another to rule your's out as a possible cause?
Click to expand...

It's an EVGA 850W G2, so a good one. How would you know it was the PSU, short of swapping out? Is it an identifiable issue if I needed to RMA it?

The only spare one I have is an older BeQuiet 630W Bronze. Not sure that would be enough for my system. Plus I'd have to dismantle a system to get at that.

Is there no way I can 'test' my existing one?
 
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