Both of them. The mobo should be in my Speccy.

edit: just loaded in with the 1.5V setting, doesn't seem like much has changed.

I managed to get into bios but there's no XMP profile to load. Everything is on auto except the ram voltage which is set to 1.650V.

I'm in the asrock bios btw

http://puu.sh/65KuR.png
http://puu.sh/65Kw8.png

http://puu.sh/65j33.png
as

WRONG ONE

http://puu.sh/65i19.png

Again, can't grab windows for some reason

Yeah, it's kind of messy considering the only thing I wanted to upgrade was the video card and the psu before things got out of hand. I'll do that.

Nope, prebuilt. I still don't know about those ram timers, though, considering I can't find the timings for the 2GB stick I have installed (there's a 4GB stick that came with the machine and a 2GB stick that I later installed, from different manufacturers).

Tested the RAM as well with memtest (forgot to mention that in OP). Again, as usual, nothing.

You're linking the full page, not the actual images

edit: ninja'd

I don't have them, I did it a while ago after I blanked the HDD (hence why I can't use the free version anymore)

edit: apparently I can now, I'll re-test it and get you those screens

http://puu.sh/6532w.png - Speedtest (puush wouldn't work for the screencap so I had to grab the whole desktop, sorry)

SMART data is coming up fine. Doing error test now.

http://puu.sh/657FG.png - Error test. Again, everything checks out

That's the one I used. Everything checked out.

http://puu.sh/651iv.png

I checked the CAS Latency of the RAM I purchased afterwards to upgrade my system (http://www.newegg.com/Product/Product.aspx?Item=N82E16820239317&Tpk=KVR16N11%2f2&IsVirtualParent=1) and it only lists the CAS as 11. Don't really know what to make of that.

Also to note is that every time I did something to this computer (changed the OS, changed the OS back, blanked the HDD, replaced the motherboard, and replaced the PSU) my computer's performance degraded.

It's only a year old too.

Yeah, that's the tut i used.

Yeah, I checked that and the BIOS option wasn't in the startup menu. I can't think of a reason it would be like that though, considering I've never messed with it before.

I tried to do that some time ago but I couldn't access my BIOS through Win8.