Graphics are tied to a lot on how the game will run - Currently, despite the "Nvidia slogan" that FFXI sports, the ATI cards run better. Could possibly be that since ATI is more familiar with the Direct X area, which the game rns on.
The new PC parts you've chosen sound fine - except the 6600, I'm not definate on that. Might want to try the radeon X700/X800 series and above if you want best fluidity and settings.
If your PC suddenly shuts down and reboots, this can be a sign that it's dying. Most of the time, the power supply is the culprit.
A lot of people just skimp over the power supply and use the one that came with the case - that's fine for not-the-top of the line PC's but over time these power supplies start failing like time. Manufacturers need to cut back on case costs to earn some money - so the power supply is what they skimp.
For the people wanting to get the higher end graphics cards today - mainly above the 9700pro / GeForce 6XXX + series, you need a decent power supply. Having a crap or power supply that came with your computer case, I'm sure that over 90% of the time cannot cut and handle the good graphics cards. Worse comes to worse, you could even physically fry your own pc parts if your power is inadequate, or eventually cause them to stop functioning.
A good way to know if your powersupply is good or not: Check the weight. Cheap, general powersupplies that come with PC Cases usually weight around the 1-3LB area. This is because they use cheaper conductors and other internal parts. You do not want something like this if you plan to use your system long term.
Ccheck newegg.com for brands such as Antec, Fortron (aka FSP), Enermax, Seasonic, OCZ are a few good ones to name. A good powersupply will generally be VERY heavy. For example, my Antec Truepower 2.0 430w weights almost 6lbs or heavier, while the 350w that came with the case weights around a measly 1-2lb. Having a heavy powersupply will never go wrong, because only the top quality companies use heavier / sturdier components.
Also check the readings on the Power supply label. You will see that the power is seperated into 3.3V, 5V, and 12V. You want to check the 12V section, atleast have 18A or higher PS if you want to run today's video cards (year of 2004 and up). I recommend atleast +25A on 12V for 9800pro and Geforce 6xxx systems.
Wattage on the PSU means almost nothing. An Antec 300W psu could beat a standard case 500w psu easily. What you really want to know is your voltage numbers.
Also, 40GB might be pushing it if you like to install a lot of things on your PC. The game takes 6-7GB of space itself, and Windows no doubt takes another 1-2GB, and Program files probably another 1-2GB depending your apps. Windows Paging file is going to take another 1-2GB chunk too, depending on how you configure it (higher for faster performance). That's nearly a quarter to a third of the total hard drive space.
I used to run on a 40GB as well, but I eventutally upgraded. It wasn't enough to hold the JP version of FFXI and NA version, and a few other games that I played. I was constantly struggling to maintain over 10GB of space, which was hard to do since I had to delete any game that I didnt play anymore, in order to make room for the next.
Solution for me was buying the Samsung SP1614N ( http://www.samsung.com/Products/HardDiskDrive/SpinPointPSeries/HardDiskDrive_SpinPointPSeries_SP1614N.htm ) It's one of the most silent harddrives available. No high pitched Whirring, clicks, ETC.
Edited, Tue May 31 21:16:03 2005 by gaidensensei