Should I crossfire 7970s? What are the problems for crossfire?

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bgi123

bgi123

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Jul 6, 2012
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Just wanting to know if I should crossfire my 7970 with another one. Game I normally play a lot are Dota2, Battle field 4 and PS2. Just wanted to know if crossfire will work well with witcher 3 and if it is worth it.
 
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mapesdhs


References:

http://www.guru3d.com/articles-pages/radeon-r9-290-review-benchmarks,26.html
http://www.legitreviews.com/amd-radeon-r9-290-4gb-video-card-review_127216/9


Two 7970s can certainly be a hefty bit faster than a single R9 290 (maybe 30% to 50%
depending on the test in question, CPU power, etc.), but alas I definitely had a lot more
driver-related glitches when working with two 7970s in CF, all sorts of odd things like
GPU-Z locking up, various tests bombing out, etc., things that just didn't happen with two
580s SLI. It's the lower quality of AMD's drivers which keeps me from...
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kunthakenthe

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May 20, 2014
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you can its like a 7990. great gpu and is similar to a r9 295x2. crossfire needs more power, puts out more heat, and sometimes have driver incompatibilites by lazy or bad developers or amd being lazy. Crossfire gives a nice performance boost and is recommended for high res/. multi monitors.
 
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mapesdhs

mapesdhs

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Jan 22, 2007
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References:

http://www.guru3d.com/articles-pages/radeon-r9-290-review-benchmarks,26.html
http://www.legitreviews.com/amd-radeon-r9-290-4gb-video-card-review_127216/9


Two 7970s can certainly be a hefty bit faster than a single R9 290 (maybe 30% to 50%
depending on the test in question, CPU power, etc.), but alas I definitely had a lot more
driver-related glitches when working with two 7970s in CF, all sorts of odd things like
GPU-Z locking up, various tests bombing out, etc., things that just didn't happen with two
580s SLI. It's the lower quality of AMD's drivers which keeps me from using their GPUs
in my own systems. If AMD improved their drivers they'd be a much stronger force in
the GPU space (general reliability I mean).

Strangely, I had fewer problems running standard game tests like FarCry2, Stalker, etc.,
but many more issues with the 3DMark synthetic tests. Had to run Vantage many times
to get a successful run.


kunthakenthe makes a good point. Even if you didn't buy a GTX 980 or whatever, the
new cards may well cause pricing shifts that could be worth waiting for, eg. the 290X
might become cheaper. I doubt NVIDIA's existing cards will become more affordable
though, as a new release tends to mean vendors clear out stocks of older cards first,
precisely so they avoid having to devalue older models. Look to the 2nd hand market
for any bargains, eg. used 780s, etc.

Ian.


 
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legend001523

legend001523

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Jun 3, 2014
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You should get single gpu, it's good in the sense that it provides more graphical power, but there are more cons than pros
1.Uses more power
2.Not all motherboards support crossfire
3.Not all games support crossfire
 
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