Originally posted by: Mr Fox
there are two failure modes, and one is mechanical... the failure rate is high also
High... as in high visibility. When the most expensive GPUs on the market fails, you tend to hear about every single last one of them... in excruciating detail.
Until ATI or Nvidia releases actual numbers, everything else is pure speculation fueled by forum posts and certain sites.
Have the latest/greatest ATI/Nvidia cards failed here and there? Sure they have. Nothing has a 0% failure rate. Are they failing enough for that rate to be considered "high?" Well, tough to say without knowing the non-failure rate plus also on what your personal definition is. For instance, if there are reports of 500 failed cards using XYZ GPU on the forums, is that a "high" failure rate? Well, if only 1000 cards were sold, then yeah, GPU FAIL at 50%. If 100,000 cards were sold, then a complete success at 0.5% failure rate (less than industry norms). If 10,000 cards were sold making the failure rate 5%, well, is that a failure or not? Seems a bit high to me, but is within the normal ranges. Also, I've noticed that computer parts at the beginning and end of their product life cycle tend to have higher failure rates than "normal" (no don't have any data to back it up, just personal observation). Finally, some of these cards are sold at aggressive factory overclocked speeds... perhaps too agressive for such new products?
In any case, until/unless we see actual sales and RMA figures, we just don't know.
Back to the OP... besides pure benchmark numbers, what about other considerations? Is there a 790i or x48 implementation that you really like that makes you lean towards one platform? Is there a particular board that you love the color/layout? What about one board having more eSATA plugs and you know you'll have many external drives? One board using waterblocks integrated into the chipset coolers? One board more flexible on memory?
What about PSUs? The Tri-SLI take up more power plugs than CrossfireX.
Basically, what I'm getting at is that perhaps there are more reasons than purely "which GPU setup gets highest benchmarks" that you may want to consider.