It might; I'll assume you're still using the original dell ram that came with your system. You don't need 8 gb more of ram; it will cost extra to match exactly your old ram and it's not worth it. Mixing brands of ram on a dell board is very problematic. Yours may have hynix, but you can pull out one stick if you want to check. Here's a good power supply, but I don't know if it will reduce your bluescreens:http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027
Well, the default RAM was 4 1Gb cards, I've replaced two with 4Gb so far, so it would only mean replacing the other two Dell cards to get me to 16Gb it currently stands at 10Gb and says so in the PC properties
And thank you, that should come in handy, don't suppose there is a higher wattage version as far as you know?