Original Link: http://www.anandtech.com/show/7424/amd-radeon-r9-290x-performance-preview-bioshock-infinite

As something of a counter-event to NVIDIA’s gaming showcase taking place in Montreal, Canada this week, AMD has organized an early, brief reveal of their forthcoming Radeon R9 290X video card. The card won’t be launching until sometime in the future, but for today we’re being allowed to confirm that we have the card and are being allowed to publish a single benchmark: Bioshock Infinite at 3840x2160 (4K).

AMD has purposely kept the public details on the R9 290X sparse so far, so we know little other than that it’s a larger GPU rated for 5 TFLOPS of compute performance, and paired with 4GB of memory for a total memory bandwidth of over 300GB/sec. Like most segments of the consumer electronics industry AMD has been gearing up for 3840x2160 (4K) displays, so the Radeon 290X is AMD’s flagship card geared towards gamers using 3840x2160 or 2560x1440 monitors.

Consequently AMD is seeking to draw attention to their 4K performance with today’s benchmark reveal. AMD named the game, the cards, and the resolution – Bioshock at 4K against the GTX 780 – so this is a very limited subset of our full results. And as with all controlled benchmark releases we’d advise not reading too much into any single benchmark here, as the relative performance of NVIDIA and AMD cards changes with the game being tested, at times rather wildly..

Bioshock Infinite - 3840x2160

The biggest problem with 4K displays for at least the intermediate future, other than price of course, will be that you’re either going to need a lot of GPU power to drive them or will have to take a quality hit to achieve acceptable performance. Neither the R9 290X nor the GTX 780 are powerful enough to stay above 30fps on Bioshock with everything turned up. For that you will need to drop down to Medium quality, which gets performance past 30fps and up into the 60fps range. The fact that we’re even talking about playing a game at 60fps this high of a resolution – with 2.25 times as many pixels as 2560x1440 – is a big accomplishment right there, it’s just not one that will come without tradeoffs. For little-to-no compromise 4K gaming we’ll undoubtedly need to turn to multiple GPUs and Crossfire/SLI.

Moving on, it’s interesting to note in this case that both cards are essentially tied at Ultra quality, but when we dial down to medium the 290X takes a very decisive 14% lead. At the highest quality settings we should be shader/texture bound due to the significant use of shader effects on Bioshock’s highest quality settings, whereas at lower quality settings at least some of the bottleneck will shift to elements such as ROP throughput, memory bandwidth, and the geometry pipeline.

Wrapping this preview up, we’ll have more details on the 290X in the near future. AMD has made it clear that they are aiming high with their new flagship video card, so it will be interesting to see what they can pull off as we approach Tahiti/7970’s second birthday.

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