spentshells
Judicious
- Apr 1, 2006
- 8,556
- 294
- 33,990
3x gigabyte radeon hd 7970 ghz for pure performance reasons.
Don't buy either
get a gtx 780 when they are released then see if you need more power
Don't buy either
get a gtx 780 when they are released then see if you need more power
Trenchcoat
Honorable
- May 7, 2013
- 732
- 0
- 11,160
Get the GTX 690. You won't have to spend silly amounts of extra cash on a power supply, case and cooling that can handle 3 7970's.
ingtar33
Glorious
- Dec 17, 2012
- 9,024
- 213
- 46,040
but true. xfire is broken. it will shove out high fps... but the frames are "partial" frames, those frames will come in spurts as well, when controling for the partial frames and the frame latencies, the "true" fps of a xfire'd 7970 is about the same as a solo 7970.
That said if you use vsync all that extra horsepower DOES come out... and you start to see an advantage to xfire again. of course there still is the issue of vsync and imput lag...
here is the link proving my point.
http://www.tomshardware.com/reviews/graphics-card-benchmarking-frame-rate,3466.html
17seconds
Champion
- Jul 27, 2010
- 10,584
- 4
- 51,965
Two things:
1) The GTX 690 is the only choice due to Crossfire's poor driver support, frame latency issues, and frame metering problems. As mentioned previously, the problems are so bad, it makes the purchase of a second AMD card a waste of money. Going for three-way Crossfire only compounds those problems and then also introduces very poor scaling on top of it. A huge waste of money, in short.
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-Dissected-Full-Details-Capture-based-Graphics-Performance-Test-3
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-Dissected-Full-Details-Capture-based-Graphics-Performance-Tes-12
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-GeForce-GTX-Titan-GeForce-GTX-690-Radeon-HD-7990-HD-7970-CrossFi
2) There is no way you should even be considering these two options right now with the GTX 780 being released in two days. It will either become an option for you or will at least have an impact on pricing for other options.
1) The GTX 690 is the only choice due to Crossfire's poor driver support, frame latency issues, and frame metering problems. As mentioned previously, the problems are so bad, it makes the purchase of a second AMD card a waste of money. Going for three-way Crossfire only compounds those problems and then also introduces very poor scaling on top of it. A huge waste of money, in short.
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-Dissected-Full-Details-Capture-based-Graphics-Performance-Test-3
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-Dissected-Full-Details-Capture-based-Graphics-Performance-Tes-12
http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-GeForce-GTX-Titan-GeForce-GTX-690-Radeon-HD-7990-HD-7970-CrossFi
2) There is no way you should even be considering these two options right now with the GTX 780 being released in two days. It will either become an option for you or will at least have an impact on pricing for other options.
renz496
Champion
- Jun 16, 2009
- 14,251
- 212
- 53,090
3 way crossfire would be disaster. if you must go with amd dont go beyond 2 way. also as far multi gpu are concern nvidia clearly has the advantage right now in this area. not that i say cf is totally bad but in some aspect they still need fixing. also with 3 7970 you would have to think about your psu as well.
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