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  1. AMD launches Navi as the $449 Radeon RX 5700 XT AMD claims performance-per-dollar leadership over Nvidia, but for how long? AMD took the stage at E3 to announce its "Navi" family of GPUs. The company's new graphics cards are officially the AMD Radeon RX 5700 XT and Radeon RX 5700. The 5700 series is launching July 7, making the GPUs a one-two punch alongside AMD's Ryzen 3000 series CPUs. AMD isn't tackling the flagship GPU market with the 5700 series. Instead, the company is aiming for more mainstream pricing with mainstream performance: the 5700XT is $449, while the 5700 is $379. AMD is positioning the cards against Nvidia's GeForce RTX 2070 ($499) and 2060 ($349), respectively, and claims performance wins in each comparison. The cards introduce AMD's new "RDNA" architecture, which AMD says has 1.25x performance-per-clock and 1.5x performance-per-watt over the previous generation. The chips are built on TSMC's 7nm manufacturing process, a significant shrink from the 12nm process used on the Radeon RX 590, and on Nvidia's GeForce RTX 2080. The Navi die is significantly smaller than the previous-generation Vega design, with a die area of only 251mm2 compared to the 495 mm2 die area for Vega. The smaller die should make the Navi significantly cheaper to produce than Vega. For specs, the top-end Radeon RX 5700 XT has 40 compute units with 2560 stream processors total. AMD gives three numbers for the clock rate on the XT: a 1605MHz "Base" clock, a 1755MHz "Game" clock, and a 1905MHz "Boost" clock. As usual, the cheaper 5700 disables compute units and lowers the clock rate, so you have 36 compute units for 2304 stream processor total, a base clock of 1465MHz, game clock of 1625MHz, and a boost clock of 1725MHz. If any of these clock rates are too conservative for you, AMD is promising the 5700 XT is "overclocking ready" thanks to a power solution with room to grown. Both of AMD's reference designs come with 8GB of GDDR6 memory. Enlarge / An exploded view of the XT. AMD For cooling, AMD's reference design is a blower-style card with an aluminum shroud and back plate. A vapor chamber draws heat into the heatsink, and everything gets blown out the back of the card. Blower cooling designs have the downside of producing a lot of noise, but AMD is promising a "quiet" card thanks to an "acoustically tuned" design. If you're unhappy with the cooler design, partner-produced cards with alternative cooling solutions should be out eventually. The cards both take a 8-pin + 6-pin power-supply connection, with AMD providing Board Power figures of 225W for the XT and 180W for the cheaper card. If you get the whole AMD package in July (meaning a Ryzen 3000 CPU, an X570 motherboard, and a Radeon 5700 card), you'll be all up and running with the new PCI Express 4.0 bus standard. This faster interconnect will be great for next-gen SSDs and 200Gbps (!) Ethernet controllers. But for video cards, we haven't seen a compelling use case yet. Still, it provides room for upgrades! All these specs are nice to know, but they don't really tell us anything about actual performance. As always, it's best to wait for independent benchmarks, and if you're in the market for a GPU, it's probably also best to see if Nvidia does anything in response. And speaking of Nvidia's response, the company has been teasing a "Super" GeForce product for a few weeks now. The rumors point to "Super" cards being up-clocked editions of Nvidia's existing cards and price drops for some non-super cards, making the company more competitive with AMD's freshly announced lineup. Again though, benchmarks will tell the real story. AMD also doesn't have an answer this generation for the real-time raytracing technology that Nvidia introduced with the RTX 2080 Ti. But given the huge hit in performance that ray tracing causes for even Nvidia's fastest cards (and the limited game support for raytracing), it's not a huge loss for AMD. Regardless of what happens between AMD and Nvidia in the PC graphics card wars, AMD GPUs promise to be almost everywhere else in the future. At the beginning of the presentation, AMD talked about the company's design wins, pointing out that AMD is supplying graphics chips to both the next-gen Xbox and Playstation consoles, Apple's Mac Pro, and Google's Stadia game-streaming platform. AMD also recently inked an RDNA licensing deal with Samsung, which will build the graphics technology into its Exynos SoCs for smartphones and tablets. Source: AMD launches Navi as the $449 Radeon RX 5700 XT (Ars Technica) (To view the article's image gallery, please visit the above link)
  2. No mention yet of when the Zen 2 Ryzen 3000s will arrive. Enlarge / AMD CEO Lisa Su, holding a Rome processor. The large chip in the middle is the 14nm I/O chip; around it are pairs of 7nm chiplets containing the CPU cores. AMD In its earnings call, AMD offered a little more detail about the launch of its next-generation processors, built using the Zen 2 architecture and TSMC's 7nm manufacturing process, and new GPU architecture, Navi, again built on 7nm. Server-oriented EPYC-branded chips (codenamed Rome) should be shipping to customers in the third quarter of this year, and so too will Navi-based video cards. In November last year, AMD outlined the details of the Zen 2 design. It makes a number of architectural improvements to shore up some of Zen's weaker areas (for example, it now has native 256-bit floating point units to handle AVX2 instructions; the original Zen only had 128-bit units, so it had to split AVX2 workloads up into pieces). But perhaps more significant is the new approach to building the processors. Zen used modules of four cores (handling eight threads), with two such modules per chip. Mainstream Ryzen processors used one chip; the enthusiast Threadripper range used two chips (first generation) or four chips (second generation), and the server-oriented Epyc range used four chips. Each die is a full processor, containing the cores, cache, memory controllers, PCIe and Infinity Fabric connections for I/O, integrated SATA and USB controllers, and so on and so forth. Zen 2 will continue to use multiple chips, but this time the chips will be more specialized. There will be 7nm chiplets, each containing CPU cores, cache, and Infinity Fabric links, and a 14nm I/O die, containing memory controllers, Infinity Fabric connections, and SATA and USB controllers. The 7nm parts should be able to achieve higher clock speeds and lower power consumption than their 14nm predecessors. The parts on the I/O die, however, generally don't benefit from higher clock speeds. In fact, they can't—PCIe, USB, SATA, and even memory, all need to run at predetermined speeds, because their performance is governed by the bus specification. The extra performance headroom that 7nm would offer is wasted. By keeping these parts on 14nm, AMD is likely able to cut costs (because well-established 14nm manufacturing should be cheaper than the newer, more advanced 7nm). The Rome processor will have up to eight core chiplets, for a total of 64 cores and 128 threads, and it will support up to two sockets. These parts are already sampling and will be ready for a third-quarter launch. AMD didn't, however, make any mention of the mainstream 3000-series Ryzen chips. There is speculation that these will be announced at Computex later this month, but for now it seems that AMD's focus is on the more lucrative server market. Also using 7nm is AMD's new Navi GPU architecture. AMD is already building 7nm GPUs, such as its Radeon VII using the Vega architecture. Unusually, the company said that the first Navi parts will be priced below the $699 Radeon VII. This suggests that rather than launching with a top-end GPU, AMD will instead start with a mid-range, mainstream part. AMD has disclosed very little about Navi, refusing to answer whether the chip will offer any kind of ray tracing acceleration comparable to that found in Nvidia's RTX parts. But with a launch next quarter, the company is going to have to spill the beans sooner rather than later. Source: AMD to launch new 7nm Navi GPU, Rome CPU in 3rd quarter (Ars Technica)
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