Only for gaming @ 1080p. I have a separate system for work. Nothing on this box but games and drivers. I'd prefer not to mess with Crossfire. I was thinking of using this system with a 7870 for at least another year.
This is a nice setup, and agree with the other poster that it is not crying for an upgrade.
However, that being said....The HD 7870 would be a good upgrade. I don't believe you will see any bottlenecks with that CPU. Is it overclocked?
You hear a lot on these forums about bottlenecks these days, and it seems to me much of what is said is purely speculation. I am hard pressed to find any actual benchmark articles that support these bottleneck claims. Even my 2 cents is based on conjecture. I wish I had actual evidence for you. I did find this forum thread that touches on your question and might help you decide:http://www.overclock.net/t/1236749/could-a-a-phenom-ii-x4-965-4ghz-push-a-7870