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Cost cutting new build: 2nd 6870 to crossfire or buy one 7850?

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  • Radeon
  • Crossfire
  • New Build
  • Graphics
Last response: in Graphics & Displays
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October 28, 2012 3:13:50 PM

Hey, so I know this question has been asked in some form or another before, but there are a few points in play here that make my question a bit more specific... I'm building a new rig around a FX-8350 and am trying to see if I may have a good option here to save at least $100.

I currently have an Asus HD 6870 that's less than a year old. I know that I want a bump in performance from that level, but I don't know if the 7850 or 7870 would be worth the $270+ that they are priced at right now.

I tried a crossfire configuration of the 6870 along with the 6850 from another computer of mine just to get a rough idea how two 6850's would perform (I know it downclocks the faster of the two cards). That seemed to be a fairly solid gain from the single card, but it wasn't where I am hoping to get to either. Would a pair of 6870's be THAT much better than (essentially) the pair of 6850's I just tried?

The last part is regarding power consumption I suppose- what would the minimum watt/12v amp requirement be for a PSU that would power a crossfire setup here? I haven't purchased the power supply yet, but I know the Seasonic 620w I had originally eyed may not be enough for the pair of cards.

:hello: 

More about : cost cutting build 2nd 6870 crossfire buy 7850

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October 28, 2012 3:21:30 PM

Your Seasonic 620 is big enough for the 2 x HD6870. I am fan of single more powerful card rather than 2 weaker in CF. On the other hand 2 x 6870 is more powerful than single HD7850/70 so if you wanted to see the same gain a minimum HD7950 would be required.
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October 29, 2012 5:30:05 AM

rolli59 said:
Your Seasonic 620 is big enough for the 2 x HD6870. I am fan of single more powerful card rather than 2 weaker in CF. On the other hand 2 x 6870 is more powerful than single HD7850/70 so if you wanted to see the same gain a minimum HD7950 would be required.

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October 29, 2012 6:34:36 AM

Wow.... I'm out of the loop on graphics card performance these days. So essentially the two logical options are either pickup a 6870 for ~$170 or go all the way up to a 7950 for ~$325? Is there a more cost effective option with the GTX cards?

I had the perception that the 6870 was sort of a dinosaur at this point in time.... am I just underestimating the performance that a crossfired pair would give me, considering I had assumed it would be less than a single 7850?
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October 29, 2012 1:55:30 PM

Performance is a perspective as well HD7850/70 or GTX660 to me all deliver acceptable performance on a single 1080P monitor.
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October 29, 2012 3:23:03 PM

Best answer selected by ocmusicjunkie.
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