SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: 1080P MW2, CSS, Gaming.
PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS
PREFERRED WEBSITE(S) FOR PARTS: Any in the US/ the chepest.
PARTS PREFERENCES: The best bang for the buck
MONITOR RESOLUTION: 1920x1200
ADDITIONAL COMMENTS: I need the best gaming performance possible. I believe 2 cores are enough? 3 or 4 cores only makes the game to load faster? i don't mind waiting and I am not going to open multiple programs at the same time. I was thinking Athlon x2 3.0 + 5850 ? the Athlon bottlenecks the 5850? 4850x2 better? 5770x2?
^ Not a good idea to club Athlon X2 with HD 5850 and also HD 5850 Crossfire ? Would drive the cost of the PC higher - Costly mobo and high power PSU...
So first decide on the budget, and your requirements...
And also the X3 is a very good choice for gaming as many games or I should say most of the current releases play better on Tri-Core than Dual...
Dual cores would be a terrible idea. I should also point out that gaming at that resolution with high details will be impossible with your budget. If that's extremely important to you, consider saving up an additional $100+ before you build.
No. That is a low quality PSU. Stick to units made by Antec, Corsair, SeaSonic, Silverstone and PC Power & Cooling. If you buy a low cost/low quality unit, you will regret it later. You want to make sure the PSU is high quality, as a bad PSU can quickly destroy your build. When bad PSUs fail, they tend to take other parts with them. The parts they usually take are the motherboard, CPU, and GPU, otherwise known as the most important parts of your build. Don't skimp on the PSU.
Now that combos better. I'm not a huge fan of XFX PSUs, as the company is brand new to making PSUs. However, their units have gotten very good reviews. That said, I don't like the 5830. It's a little too expensive for what you get. If they have a combo with either the 5770 or 5850, that would be the way to go.
You can run a 5850 on a smaller unit. However, it's not advisable. As the PSU ages, it provides less power. That means that you will need to replace the unit just to keep the status quo. I would just pay out the extra $10-20 for a larger unit now than the $80-100 for a new one later. Also, using the smaller unit doesn't leave much room for expansion and overclocking. It's just a bad idea to get the bare minimum PSU if you want the build to last and be upgradeable in the future.