I got a Dell Studio Slim and I'm looking to upgrade my graphics card from the Radeon HD 3450 to the Radeon HD 3850. What I want to know is can I still use the 3850 with the existing power supply which I know is 250w, or do I need to get a 450w, and if so which power supply do I need to get that will fit in the case. This is the first time I've upgraded a computer so I'm a bit clueless.
I didn't know they made a low profile HD3850. You'll have to upgrade your power supply for it. This Seasonic SFX 350w should work, it has the amps for it. Make sure it's the right size to fit in your case before you buy it.
Does your PSU have a 6pin PCI-Express connector? What resolution is your monitor? What CPU do you have?
Yes my psu is a 6 pin pci-e, my max resolution is 1680 x 1050, and my cpu is a dual 2.53 ghz. My computer meets all the requirments on the box except for the power supply, which is 450w while my computer's power supply is 250w.
Also, you'll need to to buy a what's known as a "low profile" graphics card. As the name suggests, it's smaller than the normal size cards. As far as I know, there aren't any low profile HD 4850's out there. Do you have a link to the card you want to install?
The 9800GT is a good choice if you choose to go for it. I'd get it over the 9600GT. I've seen the 9800GT work with 250W power supplies ( http://www.pchangout.com/forum/video-cards/39578-geforc... ) so I'm pretty confident that it will work with the 300W seasonic I mentioned. It may even work with your 250W, but I wouldn't recommend it. Your mileage may vary though