BSOD 0x000000F4 - I suspect SSD

If you mean in which port I have my SSD plugged in, I use the native (white/gray) SATA3 ports. Those are the best SATA3 ports on these motherboards. You should not be using your Marvel SATA3 ports unless you absolutely have to. Kingston and ASUS both recommends this. And so do I.

The controller I was talking about is the onboard controller that's inside the SSD, making it work (so to say).

If you want to check your performance properly, use ATTO disk benchmark utility. It's the industry standard, apparently. I've been using CrystalDiskMark and I wasn't getting the numbers I was supposed to get, so I asked Kingston about that and they told me to use ATTO. I ran 1 quick benchmark and I got numbers close to 560/520 read/write. I really do love the performance of this HyperX SSD.

Ah yeah, I have it on Marvel port. I have to switch it over to Intel. But you said that that would not fix blue screen problems?

By the way, when I say I got the same problems with this SSD that you do, I mean exactly that. I got the Skype Disk I/O error, slow crashes, hangs on BSOD screen too long and the thing where my computer can't find the disk after restart. I see there's a BETA BIOS update for my Pro edition motherboard that says something about "increased system stability" or somesuch. I'm contemplating on updating my BIOS with it, but I don't like BETA. You might have a similar update for your motherboard.

When a crash occurs, even before the BSOD you know it's coming, just turn off the the computer by the button on the powersupply or unplug the cable for a few sec and then turn the computer back on and everything works just fine.

You'll want to run a chkdsk /f to make sure your filesystem is healthy. To do that, in Windows, open the startmenu and type in "command", then rightclick on "Command Prompt" and choose Run as Administrator. Then type in "chkdsk /f" and hit enter, and press "Y" for yes (if english language). Then you restart your computer and you'll get a filesystem check during the startup. After the check, the computer will restart (just fyi). You may already know this, but I figured I might as well mention it just in case. I do this everytime I have a crash myself.

One more thing... you might wanna disable Virtual Memory entirely. I also have 8GB memory and I'm not using Virtual Memory anymore. All it does is burn out your SSD faster. It's always faster keeping everything in the physical memory anyway. I even play Rift (mmorpg) and I never run out of memory.

Without Virtual Memory, Windows can't write MEMORY.DMP files, so it won't hang on the BSOD for ~half an hour. Not that it matters, really. The fastest way to get back to normal operation is to unplug/turn off powersupply and on again as soon as you see it crashing.

I already did chkdks and it found nothing.

Are you sure is safe to disable virtual memory? I'm afraid that 8GB might still not be enough for some games.

I used to have 4GB of memory in this computer and even then I didn't use Virtual Memory. Only one game crashed on me back then (because of lack of memory), and that was Dragon Age: Origins.

Now, with 8GB, I'll never use Virtual Memory ever again (hopefully).

Note: The only thing that happens if your computer runs out of memory is that the game/application you're running which needs more memory will simply crash/close. It won't crash your entire system though. You just get a popup like "out of memory" and that's that. So no worries. If you find you need to have that Virtual Memory after all, then it's just a few mouseclicks away. :)

Btw, I just checked the ASUS website and apparently there's another new BETA BIOS update out today. For both our motherboards. A version 2001. Looks like ASUS only makes BETAs these days, so I'm just gonna give it a go.

Alright, updated BIOS and moved SSD to Intel ports. I had no issues for several days. But today, firefox froze completely while browsing and threw BSOD after about a minute. And after couple a minutes, another freeze .

Kingston released an updated firmware for the HyperX SSD series a couple days back. I got it a bit earlier because I've been in contact with their support, trying to help figure out what causes the BSOD/stuttering problems.

Here's a direct link to the firmware update:
Kingston Technology Company - Support - Solid-State Drives

I got this update about a week ago and I haven't seen a BSOD yet. But, that may not actually indicate 100% that the firmware works, at least not in my case. You see, I haven't had a BSOD since I reinstalled Windows 7, and that was 2 weeks ago. It might be like when I first got the SSD and installed Windows 7 on it, there were no problems for the first 2-3 weeks. So, I'll just have to wait and see.

On the other hand, I'm still having these annoying stuttering effects (most noticeable while playing games or videos), where the picture and sound freezes up for just a sec and then the computer resumes normal operation.

I believe the stuttering happens when Windows puts the drives in a powersaving state. Like, I have my power-management settings set to turn off hard drives after 15mins of inactivity, and that's about when I get this stutter, hickup or whatever we wanna call it.

Wow, that is great. Will check it out :)