While most of the AMD Computex keynote that morning was based on AMD's rd CPUs and their underlying Zen 2 architecture, the company also took a moment to briefly to respond to his highly anticipated Navi GPU architecture and related product family. AMD did not go too deep here, but they've just given us enough to enchant us with a full revelation in the not-too-distant future. The first Navi cards are the Radeon RX 5700, which will be released in July, providing 25% more power per clock and core and 50% more energy efficiency at the architectural level than the current generation Vega architecture from AMD. The products will also be the first graphics cards from AMD to use a faster GDDR6 memory. Meanwhile, AMD does not offer much in terms of performance, but compared to the NVIDIA GeForce RTX 2070 in the AMD-priced Strange Brigade game.
A Look at the Navi GPU Architecture
Compared to today's Ryzen information AMD is much more modest ̵
Overall, a Navi-Core / Navi-CU should be 25% faster than a Vega-Core on a clock by pm. Of course, the devil is in the details – AMD's data is based on internal testing using the Geomean of 30 games tested with ultra settings and 4x AA at 3840 x 2160. So, not only is it a holistic view of the core architecture, but it may still be one of AMD's biggest GPU IPCs in recent years. AMD's presentation also noted that this was part of a major streamlining of the graphics pipeline designed for both higher IPCs and high clock rates. For comparison, AMD has succeeded in bringing the Radeon VII far beyond its comfort / efficiency point to 1750 MHz with the same procedure. So it will be interesting to see how Navi compares to it.
Feeding the Beast is a new multi-level cache hierarchy. AMD claims that Navi's cache subsystem offers both higher performance and lower latency than Vega, all while consuming less power. AMD has always been a bit under pressure from memory / cache bottlenecks, so this would be a promising development for AMD's GPU architecture. In the meantime, Vega has already implemented a more modern cache hierarchy, so AMD is unlikely to change its cache levels or which blocks are clients for which caches.
AMD's memory controllers have also been updated. Lang expected and confirmed in the press release, which according to Dr. med. Lisa Su's keynote came out, the upcoming cards of the RX 5700 series use GDDR6 memory, which should give AMD's cards a strong bandwidth increase over their comparable GDDR5 Polaris cards.
It is also worth noting that the new Navi parts also support PCI Express 4.0. In fact, this is the second GPU from AMD with PCIe 4.0 functionality – Vega 20 was the first, but it's only enabled in the Radeon Instinct parts. So it's the first time it's activated in a Consumer section. Of course, to take full advantage of it, you need a PCI 4.0-compliant host, which AMD also likes to sell. The impact on performance remains to be seen. So far, high-end AMD / NVIDIA parts in games have not been significantly restricted by PCIe 3.0 x16 (or even x8). So it will be interesting to see to what extent the extra bus bandwidth helps these first generation parts.
Last but not least, of course, is the overall performance efficiency. Combining AMD's architectural enhancements with TSMC's 7nm process, AMD is boosting performance by 50% per watt for sat navs. Energy efficiency is the Achilles heel of AMD compared to NVIDIA. Also in this area, we really want to see pent-up demand at AMD. It should be noted, however, that this statement was not provided with a qualifier – when it is 50% more efficient at the same clock rate as Vega or a given total card TDP – which may affect the meaningfulness. For Polaris / Vega, AMD has decided to significantly increase the voltage / frequency curve of their cards to maximize performance at a price-performance ratio. Energy efficiency therefore depends on the clock rates with which AMD is delivered.
Radeon RX 5700 Series: From July
In addition to the architectural teaser, AMD also offered some important details about the first navi graphics cards. Navi is sold under the AMD RX 5000 series of graphics cards – that's right, after Vega and Radeon VII they will return to different serial numbers. The RX 5000 series means AMD is making a big leap in its numbering system, going 4 digits and back to the 5000 series. Officially, because AMD is celebrating its 50th anniversary this year – so, of course, the product numbers must start at 50. However, longtime observers will find that it's been 10 years since AMD's earlier 5000 series of graphics cards, the well-received Radeon HD 5000 series, and AMD may be trying to capture some of that.
Of the RX 5000 cards, the first series will be the RX 5700. These will be launched in July. AMD also shows the specific Navi GPU that is used here. However, after the AMD numbering system, we do not know if it is Navi 10 or another GPU model number.
This is a traditional monolithic chip with a significant number of pins. So if I was a betting man (19459015] ed: You still owe me a steak ), I would expect it to be paired with GDDR6. ( changed again: this has since been confirmed by the AMD press release )
While AMD does not provide us with specific performance data, the company used its Computex keynote to briefly demonstrate the performance of the card compared to the NVIDIA GeForce RTX 2070, a $ 500 graphics card , Although this is a game that prefers AMD from the beginning, it is a promising sign that they are 10% ahead of the middle to upper NVIDIA card. That means we're all looking forward to more information about the graphics card when AMD waits for the launch in July.
AMD's next major gaming event will be the E3 2019 Next Horizing Gaming Event, and AMD is sharing this with us to learn more about the RX 5000 series. So stay tuned.