AM2 Athlon 64 x2 upgrade?

Nope its pointless save your money and build a Phenom II x4 rig.

Depending on what motherboard you have overclock it as much as you can to get better performance not worth the money putting a 5000 for a very small performance gain.

http://www.anandtech.com/bench/default.aspx?p=38&p2=33&...

they don't have the 3800 but the 4050 is close enough

WHat is a good sub $200 CPU MB Ram config?

Or is there a MB/CPU that I could keep my PC2-4200 533mhz ram in for the time being? Something that I could upgrade on later and would be actually worth something then...?

Not much you can do with that ram not sure if anything supports it anymore for under 200 hmmm i like a challenge  

Found a great combo on newegg under 200 check it out will be an awsome improvement and will use you 533 ram til u can upgrade it.

AMD Athlon II X4 635 Propus 2.9GHz
BIOSTAR TA790GXE 128M AM2+/AM3 AMD 790GX
http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...
194.98

or a cheaper x3

AMD Athlon II X3 440 Rana 3.0GHz 86.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

ASRock K10N78M AM3/AM2+/AM2 NVIDIA GeForce 8100 54.99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
total would be 160.01

ATX mobo with DDR3 memory $60

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

AMD Athlon II x 3 435, you can OC it easy $75

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

total $135

spend the money saved on DDR3 memory
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

$50