Is it worth it to upgrade to 6870 w\ current PC?

[cwarner17]

So right now I have an eMachines ET1161-07 computer. Has done well for me in the 3-4 years I've had it.

A year or two ago I upgraded to a 400w PSU and a Radeon 5670. The card isn't holding up too well with some of the games I'm playing so I'm now looking to upgrade.

I'm planning on going with a Saphire Radeon HD 6870 1GB 256-bit and a Antec 550w PSU.

My only concerns here is it even worth the graphics upgrade with the current CPU and Memory I have in the computer?

Specs for CPU and Memory:

CPU: AMD Athlon™ X2 dual-core processor 4050e (Operates at 2.1GHz, 1024KB L2 cache)
Memory: 3072MB DDR2 dual-channel capable (3 × 1024MB). Expandable to 8GB. 4 DDR2 slots (total), 1 DDR2 slot (available)


Will these components still hold me back even after a powerful graphics card upgrade?

 

[The Halo Don]

Yeah your CPU is holding you back, and is even holding that 5670 back a tiny bit.

What games do you have troubles with?

 

[cwarner17]

Ah thanks, I figured those would most likely be holding me back since it was a budget buy computer from 4 years ago.

The games I'm having trouble with are Starcraft II and World of Warcraft. I'm upgrading specifically for Diablo 3 and SWToR.

 

[The Halo Don]

I honestly don't know if they are very CPU demanding, but like I said that CPU is ancient and should consider upgrading that before anything, something like a Phenom II X4.