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Two New AMD Radeon RX 6000 Series Reference Board Designs Spied

In her 2021 International CES keynote address, AMD revealed a slide with two upcoming reference board designs. The slide which points to what AMD has in store for 2021 illustrates two unannounced graphics cards, and a notebook. The first of these cards is a dual-fan sibling of the RX 6000 series that's been doing rounds for quite some time now, which is very likely the RX 6700 XT. The one next to it is interesting—a card with just one fan, which is likely the RDNA2 successor to the RX 5500 XT. The gaming notebook next to them brandishes both the Ryzen and Radeon logos, which means the company will not only launch the Ryzen 5000 mobile series based on "Zen 3," but also mobile variants of its Radeon RX 6000 RDNA2 series. The best part, all these launch within the first half of 2021.

NVIDIA GeForce RTX 3060 to Come in 12GB and 6GB Variants

NVIDIA could take a similar approach to sub-segmenting the upcoming GeForce RTX 3060, as it did for the "Pascal" based GTX 1060, according to a report by Igor's Lab. Mr Wallossek predicts a mid-January launch for the RTX 3060 series, possibly on the sidelines of the virtual CES. NVIDIA could develop two variants of the RTX 3060, one with 6 GB of memory, and the other with 12 GB. Both the RTX 3060 6 GB and RTX 3060 12 GB probably feature a 192-bit wide memory interface. This would make the RTX 3060 series the spiritual successors to the GTX 1060 3 GB and GTX 1060 6 GB, although it remains to be seen if the segmentation is limited to the memory size, and doesn't also go into the chip's core-configuration. It's likely that the RTX 3060 series goes up against AMD's Radeon RX 6700 series, with the RX 6700 XT being rumored to feature 12 GB of memory across a 192-bit wide memory interface.

AMD Radeon RX 6700 XT BIOS Analysis Reveals Extreme GPU Clock Limits

AMD is expected to debut its Radeon RX 6700 series based on the "Navi 22" silicon following its RX 6900 XT launch, to compete with NVIDIA's GeForce RTX 3060/Ti. Several rumored specifications of the RX 6700 series surfaced in an older report from last week, which referenced a similar compute unit count to the previous-generation RX 5700 series, but with a 25% narrower memory bus, at 192-bit. The memory amount itself has been increased by 50% to 12 GB, using higher memory density per memory channel. In that report we wondered how AMD could overcome the deficit of lower memory bandwidth, and whether an Infinite Cache solution is being used. Turns out, that the RX 6700 series should end up faster than the RX 5700 series on virtue of an enormous GPU clock (engine clock) increase, according to an Igor's Lab report.

Igor Wallossek analyzed two video BIOS images of Radeon RX 6700 series graphics cards, using MorePowerTool, and uncovered engine clock limits as high as 2854 MHz with 2950 MHz overdrive limits. Just to be clear, these are limits, and not manufacturer-set boost clocks. For example, the RX 6800 XT has a reference max boost frequency of 2250 MHz, whereas its clock limit set in the BIOS is 2800 MHz. One of the BIOS analyzed by Wallossek has a power limit of 220 W, and the other 186 W. Interestingly, the cards have the same 1075 MHz memory clock limit seen on the RX 6800 XT, which confirms that AMD is using 16 Gbps-rated GDDR6 memory, and that over a 192-bit wide memory bus, this would yield 384 GB/s of memory bandwidth. Find more technical commentary by Igor's Lab in the source link below.

Possible Radeon RX 6700 XT Specs Surface, 12GB the New Mid-Range Memory Size?

AMD could follow up on its RX 6800 series and RX 6900 XT launches with the RX 6700 series, which logically succeeds the RX 5700 series, and competes with NVIDIA's RTX 3060/Ti. Patrick Schur on Twitter, who has a high hit-rate with specs of upcoming AMD products, put out possible specs of the RX 6700 series. Both are based on the new "Navi 22" silicon, with an interesting set of specifications.

Apparently 12 GB could be AMD's new memory amount for the mid-range. It's unknown whether the 12 GB is running over a 192-bit wide memory interface (6x 16 Gbit chips), or whether AMD is using mixed-density chips over a 256-bit wide memory bus (think 4x 16 Gbit and 4x 8 Gbit), because even the fastest JEDEC-standard GDDR6 chips, running at 16 Gbps, would only yield 384 GB/s memory bandwidth, which is less than the 448 GB/s the RX 5700 series enjoy. Perhaps an Infinity Cache is deployed to make up the difference?
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