See... that's the stuff I know nothing about. :\ ...and I don't even know what a dual slot video card is (although I think I can figure it out. :biggrin: )
I really like my Dell, and was looking at them when the idea of getting a gaming computer came up. I'd be tickled if I could get a decent Dell and just swap out the video card and power supply. It looks like on most of the prebuilts you are going to have to change the power supply anyway if you want to run a higher-end video card.
I think i quoted that wrong...
Anyway Dells are great computers for day to day stuff, as that is what they are built for. Replacing the power supply and video card wouldn't be a bad idea but sometimes the internals will look significantly different than that of a gaming pc. Cooling is abysmal and PSU space might be restricted. Dell builds for its own parts, and has the luxury of using non standard sizes for parts. For that reason I would stay away from business pre-builts like dell and hp. Cyberpc and Ibuypower are both pretty good, and you can build a custom system on their site rather easily.
Building your own PC however would not only be cheaper but potentially more reliable, not to mention very rewarding. Here are some steps to get you started.
1) Go to youtube and watch tutorials on how to put together a computer. Best 10 minutes I have ever spent. Pay attention to the specific parts they are using, IE motherboard chipset and the CPU that goes it.
2) Once you are confident with your knowledge about pc parts and how they go together its time for you to decide what you want from your build. Keep in mind expectations about physical size, storage, video card manufacture, cooling, life expectation ect. Once you have that together find a DIY kit from newegg that fulfills those goals.
3) You will need a CPU, GPU, RAM, Motherboard, Case, Power supply, Hard Drive, DVD drive. You may also want some accessories like a fan controller. Check out newegg DIY. It will make your life easier.
4) Order your parts and begin assembly. Again check out YouTube as well as newegg reviews so as to avoid any curve balls.
5) Save lots of $
For your budget here is my suggested build.
http://www.newegg.com/Product/ComboB...t=Combo.679878
DIY kit including an i5 2500k (best price/performance cpu out there for gaming) ssd ram and motherboard. Install windows or whatever OS you use on the ssd as well as all your core programs (office, drivers, flash player, firefox, ect ect) Games and other non crucial programs go on the larger HDD
http://www.newegg.com/Product/Produc...82E16822145299
500 gig hard drive. You may not need this as your old hard drive(s) from your Dell can be placed in your new computer, but I would suggest it since drives do fail with age.
http://www.newegg.com/Product/Produc...82E16814127593
Graphics card, Nvidia gtx 560. Its powerful enough to max out (60fps) most current games in 1080p. Msi twin frozr have a remarkable ability to cool well and stay quiet. I can personally attest to this as I own a reference and msi ati 5850. Msi Twin Frozr is probably 20db quieter and 10C cooler under load.
http://www.newegg.com/Shopping/Shopp...82E16817341016
500watt psu. More than enough for your setup. Its also modular so you can manage the spaghetti.
http://www.newegg.com/Product/Produc...82E16811108236
Its a micro atx case, but probably the best case I have ever built in. Awesome, controlled airflow, minimalistic, good looks and rock solid.
http://www.newegg.com/Product/Produc...82E16811112316
If your looking for a case that resembles Dell, or just something classy Lian Li is the way to go. It won't cool as well but i will look sexy.
http://www.newegg.com/Product/Produc...82E16835103065
Heatsink and fan for you CPU. It will allow you to overclock it. And before that freaks you out, sandybridge allows for a one click overclock. NOTHING TO FEAR. If you choose not to overclock its still worth the $ because of how much quieter it runs than the tiny stock heatsink. (may not fit in the LIAN LI case.)
http://www.newegg.com/Product/Produc...82E16835233084
These are great fans. Move lots of air and stay quiet. They are to be put on the side of the In Win case to cool the GPU and CPU. You probably need 2.
http://www.newegg.com/Product/Produc...82E16811998065
Lastly a fan controller so you can turn down your fans when your not gaming.
This may all seem complex but its a so much easier than you think.