Originally posted by: DL402
Would a dual core be able to play most games on medium settings? Or is that just based on the video card?
		
		
	 
A dual core can play most games on medium settings, but then so can a Sempron.
You sound like you really want a dual-core CPU, so go ahead and get one.
The problem is you haven't given nearly enough information, and the information you have given suggests that you should definitely not get a dual-core CPU.
First off, the cheapest dual-core you can get is the $240 Pentium D 820, but the Pentium D 920 is significantly cooler/faster for $270, and the Athlon X2 3800 is significantly cooler/faster for $320, and you said you wanted AMD anyway.
Which brings us to your $700-800 budget.  It's rarely practical to spend almost half your budget on the CPU alone.  You haven't even said whether you need a monitor, case, PSU, keyboard or optical drives.  It would obviously be much more practical to blow most of your budget on the CPU if this is a simple upgrade.
And then you list your uses as Gaming, "perhaps" some Photoshop, and "maybe a bunch of multitasking."  Maybe a bunch?
The bottom line is that without very specific software that is very CPU intensive and multithreaded, you will ONLY see an improvement in performance with the dual-core CPU if you are doing "definitely a bunch" of multitasking.  It really looks like dual core will be a waste for you.
Don't get me wrong.  I just got an X2 3800 myself.  I do a lot of work that totally maxes out the CPU, and I love having Windows running smoothly while something has one of the cores already at 100%.
Also, if you have the money to spare, dual cores are nice because, like you hear so often "It's not really any faster, but it's NEVER slow."
I just don't think it looks like dual cores are what you need here.  If you want any real answers, though, you have to be much more specific about:
1) what games you want to play
2) what monitor you have and what resolution you have your desktop
3) if you REALLY think you'll be doing a BUNCH of multitasking
4) what parts that $700-800 needs to buy
5) if you really use Photoshop a lot, what DPI are you working with, are you working in 48-bit, and do you need to have a ton of images open simultaneously, and do you regularly have more than 10 layers in your documents?