Gaming PC keeps BSODing IRQL_NOT_LESS_OR_EQUAL

Well, the health was 100% last time I checked, which was a year ago, if not more. Will check today. Tho the random BSODs seemed to dissapear after I instaleed the Marvell 91xx 6Gb/s driver. Still worth a check.

The PSU is brand new and still has warranty, so even if it has problems I can send it over to Corsair for replacement. The CPU compound is recently applied (MX-4 compound).

It still is 100%.

Sorry but Windows is well known to BSOD when it's clean installed. I have lost count on that issue(?) as I've been around Microsoft products since their days in CP/M to present day.

I don't think that's too new. But as I said, the IRQL BSODs dissapeared. About that MEMORY_MANAGEMENT BSOD (the last one I got), what does it mean?

I meant the BSODs dissapeared after installing the SATA 6Gb/s Marvell 91xx driver.

If I wouldn't have done my research, I would have not suspected my HDD from being on its edge. Anyway, I think I just found my problem, one that apparently you completely overlooked: my RAM configuration, it's listed in the original post. Just noticed the RAM usage going up-n-up-n-up until it reached 93%. And guess what? None of the programs I was running was using more than 53 MB. The next program after that is using 40. The next, 35 and so on until it reaches 0.1. There are ~16 programs running. So, the RAM usage should be less than 1 GB. But it actually is almost 8 GB.

That was true over a decade ago but today, Windows will use RAM, even for a trivial thing. Being an VM OS, the correct amount of free RAM is zero. Disk access is costly, and freeing RAM in a VM OS is under a millisecond so it's correct for a VM OS to run with little free RAM.

Anyhow there are more things that use RAM that may not be in the usual Task Manager report. For example, where is the disk cache size? Many folk look at just apps and it doesn't add up. (it never does.)

I see some tinkering with the OS here so I can't guess whar's not stock. At the office, which is a clean ship, the settings are all stock.

PS. If you run W10, turn this off too.
https://www.howtogeek.com/224981/how-to-stop-windows-10-from-uploading-updates-to-other-pcs-over-the-internet/

The installation is not modified by any means. It's my brother's PC, not mine. If he'd known how to modify the OS, he'd know about these forums too. Mine is modified, but no modifications that I know of can do such a thing to the RAM usage. There is tho one more thing: when I shut down the PC, I saw some program preventing Windows from shutting down that had no name and was pretty darn persistent. Windows stopped it, then it when to the Shutting Down… screen, then back to the programs preventing Windows from shutting down and this program was still there. Going to run a scan on it now. I can expect the antivirus to find some threats, as he managed to destroy Firefox in less than one month once.

Looks like I didn't know what I was writing there… A bit over 1 GB is what I've actually seen it usually use.

That's odd. Anyhow most browsers have a reset method which works better than any uninstall and reinstall. Be sure to use that.

Did you turn off the W10 sharing I noted?

By destroy I meant manage to screw up the search engine. It would automatically switch from Google to Yahoo! even if I deleted Yahoo!. So, the only option was to completely reset the browser, as you said.

I'm starting to be unsure as to wether you read my original comment, as I mentioned there that the PC has Windows 8.1, not 10. And for good reason, as Windows 10 runs pretty badly on HDDs, especially older ones after a couple of programs are set to start with the OS. Also, my brother likes the Start Screen, so there's another reason. And yes, I know very well Windows 10 has a Start Screen as well as my brother knows, but it's just not the same thing. It's only similar and that's not enough.

I rebooted Windows into Safe Mode and I'm letting it overnight to complete the scan. Hopefully that solves the issue.

The problems were so small that our office lab and home went totally to w10.

I have not seen our PCs have issues with HDDs and W10. If anything we see less waiting. But again we run a tight ship, turn that thing off, etc.

Windows 8.1 is his choice, so that's his OS. No viruses were detected.

Giving it a try right now.

You have something wrong with your ram.

Start with one stick and run the test again.

I really don't have 15 hours to spend on just waiting, basically to lose.

I don't know if this is helpful or not, but I think it is. All those errors happened after the 4096 MB mark was exceeded and less than 6144 MB. And since I have a stick of RAM in there that has 4096 MB and the rest have only 2048, I suspect the second stick is faulty. Will remove it and run an AIDA 64 again to see if it BSODs that MEMORY_MANAGEMENT thing again.

Also, yes, it is the HDD as well. Ran an AIDA 64 test and returned unstable and below average results: ~70msecs of latency, minimum was 30 and maximum was 76. Buying a new HDD and a new 2 GB stick I suppose.
Or would it be better to get a 4 GB stick to replace both of the 2 GB sticks (it's DDR3 RAM, if that wasn't obvious by the X58 platform).

One of the recurring sources of BSODs are mixed sticks. To avoid this you install all the same make, model and size. If you mix you find it may or may not work all the time.

All the specs and configurations are listed in my original comment! Including the OS, the RAM config, the HDD, everything. Please read it!

I hold that issue in reserve until we cover the other areas. I find that folk can't believe this or other issues so I wait. If you find that objectionable I apologize.

What you want is a 3x kit.

Ddr3-1066

3x2GB or 3x4GB.

Then you look in the manual to see which slots are matched.

Fix the ram first and then chase the hdd issue

I can solve the RAM issue by simply pulling those 2 2GB sticks out and leaving the system with only 4 GB for a while. But I just don't understand how in the heck can't this MoBo, which is supposed to be top of the line in X58, a good RAM config for these sticks, but an EX58-UD3R, which I have in my PC and is apparenly not so top of the line, can. I mean, I can start messing with the MemOK! button, could that help?

I really can't afford both new RAM and new HDD, only one of them. So I must find a stable config for these sticks or just have the conflicting ones pulled out.

At least it's not the MoBo.