This page is my attempt to help out the community of Dell Inspiron 530 owners or pre-owners who have questions about upgrading their hardware with a new video card or a new power supply, or both. The photos were taken with the intention of being helpful for others with lingering questions. After purchasing my Insprion 530, I wanted to upgrade the video card, and therefore needed to upgrade the power supply to avoid difficulties with insufficient power. In the past, Dell has had a bad reputation for having proprietary hardware, so I did a lot of study and research and shopping around, before coming to the conclusion that it should work with any ATX power supply. So I hope this information can help you out. But as usual, YMMV (Your Mileage May Vary). Still recommend doing your homework.
Dell pre-sales said that the Inspiron 530 (there's a standard sized case, and I think the 530s is a slim sized case; this page / my case is the standard sized one) comes with a 300 watt power supply, but when I got it, it turned out to be a Lite-On 350 watt Power Supply. See 524_2424, the second picture below for the model number. I still decided to be safe and upgrade the power supply to a larger wattage. When pikcing options for the system, I checked what the fastest video card was, and figured I could go that high without having problems with the existing power supply. I think it was nvidia 8600, but I cannot seem to locate that information anymore. Google might be able to tell you. But since I wanted to go higher, I decided to go ahead and research a power supply (psu) that would ensure enough power. Apparently, if you don't have enough power delivered from the power supply, you might get intermittent and random problems like sudden shut downs, reboots, etc.
I found the reviews and information available from Tom's Hardware to be the most helpful in determining a video card for my budget / performance desires. On the main page, look for the "The Best Gaming Graphics Cards for the Money" series which seems to be refreshed monthly. It's boiled down to price range, and has a NICE tiered chart that shows you approximately where all of the cards rate performance-wise to each other.524_2423 overview measurement looking into case, near power supply
This setup attains a Vista Experience score of 5.5. For those that don't know, your Vista Experience score is the lowest of about 5 (or 6?) sub-component scores. The highest sub-component rating on this system is 5.9.