I'm having a nightmare rig at the moment

First build in two years... that's my excuse anyway
First problem (stupid me)
Plugged in the DS4 mobo, got it all set up and ready to go, but the fans went and nothing else. So I presumed I had a dead mobo.
The next day, after borrowing ram, psu and cpu off someone, I realised there's three power connectors on the DS4 mobo not two - I plugged the third one in and it worked

One of them is a PCI-E boost, apparently, and I had the 24 pin and the PCI-E boost plugged in, but not the other 4 pin >.<
Second problem (stupid me, again)
Well seeings there's a PCI-E boost going into the mobo, I figured that PCI-E didn't need power going to the actual card. So when I booted up I had this ugly corrupt display, I thought I had a bad GFX card. But then I went and bought a molex->6 pin converter and the card worked fine after plugging that in.
Third problem (wtf)
At the WinXP install, when I go to format the hard drive, it would tell me my disk is damaged. Although
every diagnostic tool I tried, including the manufacturers, said it's fine. But after loading the DS4's drivers off a floppy disk during install, it worked okay. I didn't seem to have this problem formatting with the P5B, which I bought later on.
Fourth problem (not stupid me, just crapiness)
CPU was idling at 55'c using the ACF7 Pro! And under load it would get too close to 70 for my liking. So I had to lap the CPU to get the load temps down to 40. But even so, a lapped CPU should idle better than 40... so after reseating many times and making sure that my lap is certainly perfectly flat, I figure not only did I have bad CPU, I also have a bad Freezer 7 as a few others have had them.
Fith problem (just getting silly now)
OK ready to install games, X1950XT all plumbed up, but the three games I pretty much bought the PC for don't work. Company of Heroes, Call od Duty 2 and Counter-Strike: Source. Tried different drivers and still the same problem. I even bought a new mobo, P5B Deluxe, and that didn't solve it. I measured voltages on my PSU and it was all fine (I even watched the voltages during loading, etc) and that wasn't the problem. Using a cracked version of CoD2 worked in the end, turning off error catching in the ATI drivers allowed CoH to load (albeit
very slowly), but CS:S still didn't work. I tried an nVidia 6800 in my PC and everything worked fine, then I tried my X1950XT in another PC and for some reason everything worked fine there, too. The PC even had the same PSU as mine. Driver updates, windows updates, etc... didn't solve the problem

Not good enough says me, so off goes the ATI card and DS4 motherboard - although the DS4 didn't seem to be the problem but I had a P5B now. So now I have £290 saved up for a better card later on.
Sixth problem (during setting up the P5B mobo)
Why do I have to be the one who gets a dodgy ASUS driver CD. Not so much a problem, but hell it's an annoyance and a half. Eventually I managed to make a copy of the files on the borked CD and install off the copy, but usually the CD would just confuse the computer I put it in. I could've downloaded off the 'net, but for some reason I obsessively wanted a working CD with the auto-run and InstALL thing.
Seventh problem
Since I sold my graphics card I haven't been able to try and fix this yet, but I'm pretty sure a driver update will do the trick - but the P5B's sound is disorted above 80% in volume control, which is lame. We'll have to see how that one goes when I get my graphics card in 6 weeks or so.
So yeah. This has definately been my worst experience of PC building. Ever. I thought after 2 years I'd be happy to get back into building PC's, but I was wrooong!
Also as a note, I RMA'd the memory although it did pass memtest, but didn't solve any problems.