Banchetto 101 Case-Less System
eVGA 780i Mobo
eVGA 295 GTX Video
8 Gb Corsair Memory
Thermaltake TRUE Black CPU Cooler
VelociRaptor 10,000 rpm HD
Windows 7 RC 7100
The people on here keep skirting the issue and/or hiding the fact that Dell does not make a power supply greater than 350 watts for the Dimension 8400. The machine requires a propietary connector that nobody else has duplicated and you cannot buy a compatible power supply from any other vendor in the world that will work with the 8400. So you are stuck with the 350 watt Dell power supply. Fortunately it seems to work fine with the top-end video cards, but I'ts sad to learn that our new $1,000 PC's are not upgradeable in the power supply department.
I appreciate your comments but they were not really helpfull because they never really answered our questions directly. Why not just tell us that Dell does not make another power supply for the 8400? A direct answer like that would be honest and save people like us a lot of time trying to discover it for ourselves.
Sorry guy's actually there is an after market power supply!!It is a KDM power supply designed to replace the original power supply NEW 450W POWER SUPPLY Replace Dell Dimension 4600,4700,8400 - FREE PRIORITY SHIPthe oem 350 watt and this is for sale on ebay for a very reasonable price!
I know this is an old thread, but I wanted to point out that there was a time when high end video cards were saying you had to have 750 or 1000 watt power supplies to be able to install and use them.
I have seen video cards pull more power than the system board could supply and it caused the system to randomly crash from overheating.
The most important thing to keep in mind with Dell systems is this. They are not designed to be upgraded. Dell is in the business of selling computers. Buy what you need and if it doesn’t do the job any more, Dell wants you to buy a new system, NOT upgrade what you have.
So, buy high end, use it until it doesn’t do the job, then buy a new unit.