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Crossfire a amd 6850 gpu with a amd 3870k apu

Last response: in Graphics & Displays
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June 15, 2012 12:09:59 AM

i have a 6850 running off the new 3870k apu and i wanted to know if it would bottleneck what could be the positive and negitive spec wise if i did this vs triple fire the 6670
a c 106 U Graphics card
a b À AMD
June 15, 2012 12:14:23 AM

hybrid crossfire only goes up to 6670 iirc
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June 15, 2012 12:16:50 AM

so i could not crossfire the 6850?
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a c 106 U Graphics card
a b À AMD
June 15, 2012 12:18:57 AM

nope
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a b U Graphics card
June 15, 2012 12:19:52 AM

What games, what screen resolution?
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June 15, 2012 12:24:10 AM

I'm fairly certain that trying to get the integrated GPU to work with 2 6670's in xfire is not possible.
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June 15, 2012 12:25:20 AM

gta 4 bf 3 mp3 most new games on want to play all on max settings 1920x1080
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June 15, 2012 12:27:46 AM

i have the 6850 and can run 90% at max but wanted to know if i could cross fire them since the apu turns into a cpu
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June 15, 2012 2:48:43 AM

so you are saying if i tried to pair a 6850 with a 6850 it would not work?
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a b U Graphics card
June 15, 2012 3:39:44 AM

that is correct, according to the graph supplied by AMD in my link, the 6850 is NOT compatable with the dual graphics setup. Especially not triple graphics. Sorry.. To be fair, it wouldn't have really made an ounce of difference to your framerates!
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June 15, 2012 3:42:23 AM

thank you.... i can just oc my 6850 now to get there lol
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a b U Graphics card
June 15, 2012 4:01:12 AM

Hell yeah, that's what I like to hear!
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June 15, 2012 4:37:57 AM

mikebik said:
so you are saying if i tried to pair a 6850 with a 6850 it would not work?



If that's what you're attempting, then yes. That would work. Provided you have 2 PCIe 2.0 slots on your motherboard and a strong enough power supply. A 600W power supply should be sufficient.

Sorry; I misunderstood what you were asking.
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a c 79 U Graphics card
a b À AMD
June 15, 2012 5:09:07 AM

mikebik said:
i have a 6850 running off the new 3870k apu and i wanted to know if it would bottleneck what could be the positive and negitive spec wise if i did this vs triple fire the 6670

bottlenecks will be game specific afaik. check your cpu and gpu usage during gaming using windows task manager and a gpu monitoring program like gpu-z or msi afterburner.
there is no 'triple-fire' with amd apus. amd only supports 'dual graphics' aka hybrid crossfire aka asymmetric crossfire with cards radeon hd 6450, 6570 and 6670. some motherboards have pcie x8+x8 support but that's for crossfiring the two cards on the pcie slots, not for the apu and the graphics cards.
mikebik said:
so i could not crossfire the 6850?

no
mikebik said:
gta 4 bf 3 mp3 most new games on want to play all on max settings 1920x1080

imo you'll have to play them to find out. iirc gta 4 is a pc version of a console game which favors strong quad core cpus. your 6850 is not enough to max out very demanding game like bf3. but you'll be able to play at medium to high settings with reasonable fps as long as the 3870k doesn't bottleneck (unlikely with a 6850).
mikebik said:
i have the 6850 and can run 90% at max but wanted to know if i could cross fire them since the apu turns into a cpu

if your motherboard has two pcie 2.0 slots supporting x8+x8 modes, then you might be able to run two 6850's in crossfire. however i suspect that the apu's cpu imght not be powerful enough to run two 6850s in crossfire. apus were designed to be run on entry level machines after all.
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June 15, 2012 11:28:40 AM

i have a 750 watt psu and 2 pcie 2.0 Supports AMD Quad CrossFireX™, CrossFireX™ and Dual Graphics.... i have run bf3 on max also mp3... i can oc my apu if needed to help?
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a c 79 U Graphics card
a b À AMD
June 15, 2012 2:27:39 PM

mikebik said:
i have a 750 watt psu and 2 pcie 2.0 Supports AMD Quad CrossFireX™, CrossFireX™ and Dual Graphics.... i have run bf3 on max also mp3... i can oc my apu if needed to help?

a8 3870k is fully unlocked, you should be able to easily oc your apu. make sure you have a good cpu cooler to keep the overclocked apu run cool.
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June 15, 2012 9:01:28 PM

im going to wc it so i should be fine..... thanks
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