New card to get - three choices?

I already have a HIS IceQ X Radeon 6870 in my computer.
I'm inbetween getting a second 6870 and crossfiring it, also buying a larger PS (I only have a 600w right now, so I'd need to get like a 700w. But I can also sell the 6870 and PS if I don't get a second one). But isn't there problems with Crossfiring, like Skyrim doesn't like multi-GPUs, and would there be micro-stuttering?
Or a HIS IceQ Radeon 7870.
Or a HIS IceQ X Turbo Radeon 7850.

Which would give me maxed out graphics, or close-ish, and some AA in: CoD:BO2, BF3, Skyrim, and Blacklight Retribution? But, at 1080p (I know, I'm sure I won't max out in like BF3 and Rome 2 when that comes, but I want as much as possible :D) And best performance editing (Camtasia Studio)?
Or is there another GPU you'd recommend for SIMILAR prices? (i.e. no 7970 lmao)
All in all, which would perform best?

US, either Newegg, Microcenter, or Amazon but that does not matter. Probably slight OC with MSI Afterburner.
CPU: AMD FX 6100 6 core, OC'd to 4.1ghz. MB: ASUS M5A97 EVO. RAM: 8GB Crucial mid.
Thanks a million guys, I really, really appreciate it. Hope you can help :)

Edit: It's a Thermaltake TR2 600w.
8 answers Last reply
More about card choices
  1. Which PSU model is it? If it's any good, you can run 6870 CF.

    On the other hand, the 7870 would give most of the performance of 6870 CF without microstutter issues.
  2. samuelspark said:
    Which PSU model is it? If it's any good, you can run 6870 CF.

    On the other hand, the 7870 would give most of the performance of 6870 CF without microstutter issues.


    Edited post; it's a Thermaltake TR2 600w.
  3. I would go 7870, as above, to avoid microfreezing.
  4. That's a pretty cheapo PSU unless it's the 80+ Bronze version. I would get a 7870.
  5. Nice card!

    For your next one, go with the HD 7870. No reason to limit a CrossfireX setup to 1GB VRAM.
  6. +1 on the 7870. no CF issues like microstuttering , and lower power usage. unless that PSU decides to sh** out on you after the exchange, your current one is more than plenty.
  7. Get 7870 Ghz edition.
  8. If you haven't bought yet, this would probably be the best for the money in your price range: http://www.newegg.com/Product/Product.aspx?Item=N82E16814500270
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