The community name "Nixie" originates from a variant of the classic MX Black, which was specially adapted to the wishes of the former German company Nixdorf Computer AG: The requirement was a milky upper part of the housing, an increase in the actuating force from 60 to 63.5 centinewtons, as well as the relatively rare solution at the time of having a diode integrated into the switch for n-key rollover, or NKRO for short. In addition, there are two different variants to cover the diverse needs of DIY enthusiasts and the switch community: one with first-class high-performance lubricant in perfect dosage, which was applied in a high-precision, automated process, and one without pre-lubrication. The now-introduced MX Black Clear-Top follows in the footsteps of this legend but is optimized by current manufacturing processes and materials.
Since the switch, which was specially manufactured for Nixdorf Computer AG at the time, was only produced for a few years, the original "Nixie" is highly sought after and is only available second-hand or can be found as an expensive rarity on various sales platforms. Due to the characteristic exterior and the smooth switching feel with rich acoustics, this variant is considered an insider tip for fans of linear MX switches. The "Navi 31" MCM are expected to be surrounded by JEDEC-standard 20 Gbps GDDR6 memory chips.ĬHERRY MX, the market leader and expert for mechanical switches in keyboards, unveils the MX Black Clear-Top, a new edition of a switch that was produced in the 1980s and is known in the community as "Nixie". This is not multi-GPU-a-stick, because both SIMD chiplets have uniform access to the entire 384-bit wide memory bus (which is not 2x 192-bit but 1x 384-bit), besides the other ancillaries. The GDDR6 memory controllers handling the chip's 384-bit wide GDDR6 memory interface, will be located on separate chiplets built on a slightly older node, such as TSMC 6 nm. These chiplets are likely built on the most advanced silicon fabrication node, likely TSMC 5 nm EUV, but we'll see. It's rumored that "Navi 31" features one or two SIMD chiplets dubbed GCDs, featuring the GPU's main number crunching machinery, the RDNA3 compute units. "Navi 31" is an MCM of as many as eight logic dies, and no memory stacks (no, those aren't HBM stacks in the picture below).
AMD had made MCM GPUs in the past, but those have been packages with just one logic die, surrounded by memory stacks. MCM GPUs aren't new in the enterprise space with Intel's "Ponte Vecchio," but this would be the first such GPU meant for hardcore gaming graphics products. Based on the RDNA3 graphics architecture, this will mark an ambitious attempt by AMD to build the first multi-chip module (MCM) client GPU featuring more than one logic die. Here's the first picture of the "Navi 31" GPU at the heart of AMD's fastest next-generation graphics cards.
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