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A8 3870k + hd6670 crossfire vs HD7770

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November 20, 2012 2:30:00 PM

Hey guys! This is my first post, so bear with me, please..>_<

I recently got an AMD A8-3870k apu which I have known to have it's own integrated gpu. I've also read that you can "crossfire" that with a compatible discrete GPU giving a considerable increase in performance. Now, I've got two choices for the GPU which are HD 6670 and HD 7770. The latter isn't supported to be in "crossfire" with my APU but it's obviously better if you don't count that.

I've been searching for benchmark test results that compares a crossfired 6670 to a non-crossfired 7770 but could not find any.

I also have a Phenom II X4 945, would it be any better if I partnered it with the HD7770? Which is the best config? I mainly use it in gaming @ 1080p if possible, and a little bit of video editing/rendering (After Effects, 3DSMAX).
November 20, 2012 2:39:30 PM

Don't use the 7770 with the 6670. a8 with 6670 will be your best bang for your buck.

Put the 7770 with the Phenom. If you can afford to, go with the 7850 as the 7770 will limit you at 1080p gaming.
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November 20, 2012 2:49:40 PM

Thanks for the reply, that was quick!

I'm not actually gonna use both video cards. I was thinking which one would I use with AMD A8-3870k because it supports hybrid crossfire (but now they call it dual graphics)with the HD 6670.

This is how I want it compared:

A8-3870k + HD6670 (dual graphics/hybrid crossfire)
VS
A8-3870k + HD7770

And if possible

Phenom II 945 + HD7770


BTW, the A8 is Black Edition.
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November 20, 2012 3:27:35 PM

An A8-3870K + 6670 = 6690 (in AMD's terms). The 7770 is roughly 75% faster (based on several PCs I've built) in 3dMark11 than that combo. Plus, you have to remember that crossfire is only going to work when the games/drivers support it while a 7770 will always be faster since it's not relying on CAP drivers. 3dMark11 supports crossfire. 3dMark06, a dx9 benchmark, doesn't. There, you'll see a 7770 is just about 3x faster. So, games that have crossfire support will be up to 2x faster with a 7770 and those that don't will be up to 3x faster.

In regards to running a 7770 with either a 3870K or 945, they're both going to be roughly equal as they're basically the same core (not quite...but basically) and same speed. You're not going to see any difference between the two processors.

The A8+6670 crossfire is a slick little way to get a little performance boost but it is never going to be faster than a stand-alone card. For gaming at 1680x1050 and below you'll probably be fine (that's what my daughter has and she's never had any issues). Anything above that and you'll want a minimum of a 7770 or GTX 650Ti (the non-Ti isn't quite fast enough for me at 1080).
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November 20, 2012 3:52:57 PM

dkapke said:
An A8-3870K + 6670 = 6690 (in AMD's terms). The 7770 is roughly 75% faster (based on several PCs I've built) in 3dMark11 than that combo. Plus, you have to remember that crossfire is only going to work when the games/drivers support it while a 7770 will always be faster since it's not relying on CAP drivers. 3dMark11 supports crossfire. 3dMark06, a dx9 benchmark, doesn't. There, you'll see a 7770 is just about 3x faster. So, games that have crossfire support will be up to 2x faster with a 7770 and those that don't will be up to 3x faster.

In regards to running a 7770 with either a 3870K or 945, they're both going to be roughly equal as they're basically the same core (not quite...but basically) and same speed. You're not going to see any difference between the two processors.

The A8+6670 crossfire is a slick little way to get a little performance boost but it is never going to be faster than a stand-alone card. For gaming at 1680x1050 and below you'll probably be fine (that's what my daughter has and she's never had any issues). Anything above that and you'll want a minimum of a 7770 or GTX 650Ti (the non-Ti isn't quite fast enough for me at 1080).


I see... Yeah, that's mostly what I expected. Then 7770 it is.
I would want a GTX 650ti but I think that would require me buying a new psu because I was told that it requires more power. My budget limits me to 7770 or GTX650 only. And this http://www.tomshardware.com/reviews/geforce-gtx-660-gef... tells me 7770 is better.
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November 20, 2012 4:59:00 PM

Best answer selected by Requiem898.
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