I'm planning on buying a new PC, and I'm trying to decide on the configuration specs for it. (This one, from iBuyPower: http://www.ibuypower.com/ibp/store/configurator.aspx?mid=299) My biggest problem is in deciding on what to select for the power supply and processor cooling. There's quite a few options for both, and while their "Help me choose" link will give specs for each, it doesn't give any help for determining what specs I would need in order to power & cool the system as it's configured. Anyway, here's the specs I have so far. The features themselves from the configuration page are listed in black. (And I went ahead and listed all of them, whether they're relevant to my main questions or not.) My own comments are in blue, and my questions in red. Case: Thermaltake Xaser VI Gaming Case w/420W Power Supply Black/Red Case Lighting: None Power Supply: ???? Here's the first of my main questions. They offer 15 different power supplies for this system, ranging from 720 to 1250 Watts. (Prices differ by $200 between the cheapest and most expensive.) But I don't know how to determine how much power I need to run the system. ???? Processor: [=== Quad Core ===] Intel Core 2 Extreme Quad-Core Processor QX9770 (4x 3.2GHz/12MB L2 Cache/1600FSB) Free Software/Game: Free Game - [scions of Fate] Free Game - [Anarchy Online] Free Game - [Halo 2] must purchase with Microsoft Windows Vista operation system Processor Cooling: ???? My second question is similar to the first. They're both about how do I determine what the system is going to need. In the case of cooling options, they offer eight options with a price range of $122. Here, although they provide some specs for each, they're different specs, and I can't even figure out which ones are better or worse than others. But even if I did know which systems did a better job of cooling, how would I know in advance how much cooling my machine is going to need? ???? Motherboard: Asus Striker II Extreme nForce® 790i Ultra SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394, Dual PCI-E MB Memory: 2048MB [1024MB X2] DDR3-1333 PC3 10666 Memory Module [Note: I will probably be upgrading this, but Newegg has it at better prices than iBuyPower.] Video Card: NVIDIA GeForce 9800GTX 512MB w/DVI + TV Out Video Video Card Brand: === High Performance === eVGA Brand Video Card Powered by NVIDIA Hard Drive: 500 GB HARD DRIVE [serial-ATA-II, 3Gb, 7200 RPM, 16M Cache] 2nd Hard Drive: None [Note: I will be moving the hard drive from my old PC to be a secondary hard drive on the new PC. (It's the simplest way to transfer all my files.) Then I expect that in a few years (when the size of apps goes up another order of magnitude) I'll be adding a third hard drive as a space expansion. So the power supply needs to support several hard drives.] External Hard Drives [uSB 2.0/eSATA]: None CD/DVD Drive: None CD-RW/DVD-RW Drive: [** Special !!! ***] 20X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive Black Sound Card: Creative Lab Sound Blaster X-Fi ExtremeGamer Speaker System: 600W PMPO 3 PCS Super Bass Subwoofer Speaker System Network Card: Onboard LAN Network (Gb or 10/100) Floppy Drive: Mitsumi 1.44 MB Internal Floppy Drive Black Monitor: None 2nd Monitor: None Keyboard: Logitech G15 Gaming Keyboard Mouse: Logitech Optical Internet Mouse Black USB 2.0 Accessories: None Meter Display: Thermal Temperature LCD Display Black Flash Media Reader/Writer: 12-In-1 Internal Flash Media Card Reader/Writer Black Extras: None Operation System: Microsoft Windows Vista Ultimate + [Free 60-Day !!!] Microsoft Office 2007(Word, Excel, Outlook, PowerPoint, Access ....) 64-Bit [Note: Actually, I'm still debating between Home Premium and Ultimate. Definitely 64-bit, though.] Media Center Remote Control & TV Tuner: None Additional Software: None Case Round Cable: ???? Just a minor question on this one. They offer a couple of $19 options that I don't really know what they're for. I could get rounded cables for all the drives. Why? What do rounded cables do for me? And for $19 I could get "Professional wiring for all cables inside the system tower". Professional wiring as opposed to what? I doubt they have amateurs to put these things together otherwise. ???? USB Flash Drive: None MP3 Player: None TV Tuner: None Video Camera: None Headset: === Gaming Headset === Zalman 5.1 Channel ZM-RS6F+M Headset w/Mic Power Protection: ** iBUYPOWER Recommended ** Opti-UPS SS1200-AVR Mighty Voltage Regulator External Wireless Network Adapter: None Wireless Network Access Point/Router: None Warranty: Standard 3-Year Limited Warranty + Lifetime Technical Support Rush Service: No Rush, Ship Out in 5~10 Business Days Well, as you could probably guess from some of those specs, one of the purposes for the system is gaming. It's also for bookkeeping, drawing/artwork, language study, programming, and a number of other things, but gaming is the most demanding on the system, so it's what I look at for choosing specs. I'm planning on keeping the system for quite a while (at least 5 or 6 years - or hopefully just some minor component upgrades can stretch that out even longer). That means that I want to get a system that will be able to play whatever games will be coming out 4 or 5 years from now. Given the rate of change in computers, that's a challenge, and the only way I can think to do it is to buy a system that's deliberately overpowered for my current needs. (The computer I'm using now was Dell's highest-end top-of-the-line system five years ago when I bought it, and I upgraded the memory a couple years later. Now, even at minimum graphics settings, it really struggles to get through Lord of the Rings Online.) Any comments/suggestions would be welcome regarding which components really need to be maxed out in order to get that longevity versus which ones I could go a bit cheaper on and easily upgrade later. (My experience with hardware upgrades is limited to adding hard drives and upgrading memory. I could upgrade other components, but wouldn't want the hassle of dealing with ones that have a lot of compatability issues with the rest of the system.) I'm figuring the case and the motherboard have the most to do with how readily upgradable the system will be later. So those and the processor itself would determine how long the system as a whole would last me before needing to replace it completely. Does that sound right? But then I also wanted significant components like the video card to last a while before needing an upgrade, so I went fairly high-end there, too. (And a few extras I threw in just for fun - I don't really need that headset.)