I want to upgrade my Psu in dell XPS 8000

What are your system specs and what GPU are you planning on installing? Are you wanting to Crossfire/SLI now or in the future? Unless you intend on SLI/CF, a good quality 500-550W PSU should be more than enough for your PC.

The XPS8000 uses a standard ATX sized PSU. Any ATX PSU should fit. Of note, higher capacity PSUs are typically longer...in other words they will protrude deeper into the case. If you have limited space available in front of the PSU, then I will caution you to measure the length of your current PSU and compare that to any new PSU that you intend to install in the PC.

I was looking at a GeForce GTX 560 Ti. I was adding on another 100w just to allow a bit of extra capacity. I have recently installed an extra fan and changed the cpu fan for a larger Zalman cooler. I also want to add another hardrive

A quality 500-550watt will still be enough!

Hi  

WHOA...STOP...

Some Dells use a DELL motherboard...which CANNOT have a standard ATX connected to it....

WHICH motherboard have you got ???

All the best Brett  

True about older Dell's! Not the case here std mATX board http://support.dell.com/support/edocs/systems/studio800...

Hi thanks for the advice. I am new to this and there are so many different opinions. Since you know what your talking about can you recomend a specific power supply that will suit my Dell 8000 Xps
Thanks
Brian