Two reviews here, but also be better reading reviews from other site. This site Tested both.
PowerColor Radeon R9 290X PCS+
http://hexus.net/tech/reviews/graphics/66625-powercolor-radeon-r9-290x-pcs/?page=10
34c idle - 76c load
Noise 33.9 - 40.2
Overclocking
In addition to the gargantuan cooler, PowerColor outfits the PCS+ board with a digital PWM and DirectFET MOSFETs. Clean, efficient power delivery should result in a good overclocking experience and we can attest to that. With little effort and no added voltage, we were quickly able to increase core and memory speeds to 1,115MHz and 6,000MHz, respectively.
Conclusion
It has been too long a wait for enthusiasts who have been longing for maximum cooling potential on an AMD Radeon R9 290X. Meeting that challenge head-on, PowerColor has introduced a mammoth PCS+ design that occupies two-and-a-half slots, weighs over a kilogram and uses a trio of fans to provide a truly high-end air-cooled experience.
Factory overclocked on both core and memory, with further headroom available, this is among the most extreme single-card solutions available today. And, in knowing that the industry is shifting to more-efficient architectures at every turn, it's a sad thought to think that these ostentatious R9 290X boards may be the last of their kind.
Still, if you're looking to pick up a single-GPU behemoth before they go out of fashion, PowerColor has managed to strike a good balance between clock speeds, fan noise and cooling performance with the PCS+. And for extreme overclocking, there's a second BIOS profile that kicks the fans into overdrive to deliver some of the lowest R9 290X temperatures we've ever seen.
The obvious catch is price. At £499 with limited availability, stock shortages and premium positioning make it difficult for PowerColor's best air-cooled R9 290X to stand out from the similarly-priced GeForce GTX 780 Ti.
Sapphire Radeon R9 290 Tri-X
http://hexus.net/tech/reviews/graphics/63953-sapphire-radeon-r9-290-tri-x/?page=10
33c - 73c
noise 34 - 39.9
Overclocking
Our overclocking experience with the R9 290 Tri-X has been mixed. We found little room to manoeuvre on the memory front, and struggled to get the 4GB frame buffer much beyond 5,500MHz. The core proved more willing though, and was happy enough running at 1,100MHz, whereas 1,200MHz introduced visible on-screen artefacts.
Conclusion
We've waited what feels like an eternity for custom-cooled Radeon R9 290-series graphics cards, but now that they're here, we feel it's safe to say they've been worth the wait.
One of the first cards out of the block is Sapphire's R9 290 Tri-X, a triple-fan solution that ultimately makes a mockery of AMD's reference cooler. Under-load temperature is reduced by over 20 per cent, noise is lessened, and to top it all off, the card is faster thanks to overclocks on both core and memory.
A price tag closer to £350 would have made Sapphire's card particularly convincing, but even at £380 - with Battlefield 4 included - this is a high-end solution that will serve you well for years to come. Very, very fast and adept at gaming at ultra-high-resolutions, the Sapphire R9 290 Tri-X should certainly be considered for your next high-end gaming rig.
