Powering up the System.
I don't really have much to write here. I had the Hard Drive ready to go with the OS installed already (haven't installed Linux yet though), everything was double-checked to make sure it was correct. Powered up the system and Bios booted right up, went into Windows 98 and it searched for a bunch of drivers. Had to restart the system several times during this to finish the job and I was up and running. Used the CD that came with the Motherboard to install the latest and greatest drivers for the motherboard and some utilities that came with it. Downloaded the newest ISO images for Mandrake-Linux 8.0 and put them on CD and installed it. Everything worked great there also. I have only found one problem and not really sure it is a problem cause everything works great. Device Manager reports there is an Unknown Device called 'PCI System Management Bus' that doesn't have the drivers installed and cannot find any to install when try. I have a email in to Gigabyte on this, but it doesn't seem to be causing any problems. I found the fix myself for the 'PCI System Management Bus' problem: Get this driver for the VIA Chipset if you have this board (via-4in1_429va.zip) at VIA 4in1 drivers for the GIGABYTE GA-7DX. This will get rid of the problem if there really was one.
Actually I was a little disappointed, because I wouldn't have anything to write that could help someone, but very happy that everything worked on my first attempt to build my own computer. When you do get your system up though, if you get one with hardware monitoring you can set it up to watch your system. This CPU has a maximum temp of 95 degrees C. It is running at 69 to 72 degrees C. I have the warning set to 80 degrees. It also has a CPU Fan monitor for the speed, which I have set to watch for fan failure. Also changed the Bios to load the video from the PCI slot instead of the AGP slot. I'll change that when I get a AGP Video Card. So for now this is it on building a computer, I recommend this one to anyone out there. I will add new stuff whenever I install something.
New Fan information: I moved the extra fan from the Upper position above the Power Supply to the Lower Position below the Power Supply, look at the pictures to see what I am talking about. This seems to keep the CPU a little cooler. Normal temp with nothing heavy running now seems to be a steady 68 to 69 degrees C (lately been running at about 65 degrees C). I ran Half-Life for a bit and the CPU temp only went up to 71 degrees C. After doing some reading I also drilled a few new holes in the bottom of my 300 Watt Power Supply Case. The 250 Watt had the intake at the bottom, the new one had it in front. So I took off the cover and made about 6 new 1/4" holes just over the CPU. There were heat sinks in the Power Supply near the front so I didn't want to circumvent them, but add a little more pulling power from the CPU. Also when you install fans make sure that they are flowing in the direction you want them too, some have marks on them.
Problems: So far the system has been running great for several months. Had normal software problems. Did have one problem where the computer wouldn't boot, would just beep once. I was too lazy to search through all my paperwork for the BIOS beep codes, so took my first best guess and swapped the memory cards (probably could have just reseated them). That worked, been running fine since then. Funny thing is that it had been running fine for several months before that happened. Time will tell.
New Heatsink information: Better and hotter CPU's have came out since. Not sure they are any hotter than the TBird core I have, but heatsinks have gotten better. I just install one of the newer ones. Vantec Aeroflow VA4-C7040 - Very unique design and is made with aluminum and a copper core. It also has a 5600 RPM speed fan with a 35.5 CFM air flow. Noise level is very low thanks to the Tip-Magnetic Driving Fan. Sitting at idle in Linux my previous heatsink temp was 69.6 degrees C. This new temp was around 49.2C with ambient air around 23.3C . Oh, forgot, idle was with Foldingathome running in the background. Actual idle temp would have been lower. Now with Foldingathome shutdown, then temp is 44.1C at idle. That is better than 25C from my first heatsink temp when I first installed it (wasn't running Foldingathome when first built computer). Part of that is helped by the new fan, which is spinning at approx. 5275-5318 RPM (runs up to 5363 when Foldingathome going). Where the older fan was usually around 4600-4740 RPM. Even though, the new fan is barely louder if at all. I read the review on it at Tomshardware.com and would recommend this heatsink. It comes with it's own thermal compound so you won't need to get any.
Then if set the HALT Disconnect bit and Stop Grant Disconnect bit on the Northbridge 761 I can get it down to 28.0C . The only problem is after awhile of not doing anything the system will lock up. Haven't solved that one yet. So still playing with it.