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Thursday | October 22, 2020
AMD: Infinity Cache for RDNA2 graphics cards?

AMD: Infinity Cache for RDNA2 graphics cards?

Of all the rumours that have been going around about RDNA2, the one about video memory was the most numerous: GDDR6, HBM2 512 or 256 bits?
By depositing the name ” Infinity Cache ” a few days ago, AMD may have revealed a few leads.

Un mystérieux ‘Infinity Cache’ pour booster Big Navi

128 MB cache for Big Navi?

Appearing for the first time on the RedGamingTech youtube channel, the information was then picked up by videocardz – the concept “Infinity Cache would be a technology registered by AMD to be used on its next GPUs. More than just a name, AMD has registered a patent that would explain its operation last September.

Infinity Cache would be a solution to lower the cost of production of their next cards while having satisfactory performance. Indeed, the largest chip named Navi 21 should be equipped with (only) 16 GB of GDDR6 with a 256-bit bus. On paper, this is clearly insufficient to combat the high-end Nvidia’s use of GDDR6X, which allows a large bandwidth.

However, the 256-bit bus would be accompanied by a massive 128MB cache, thus relieving the bandwidth, without the need for larger buses with GDDR6 (as on the Xbox X Series with 320bits ) or HBM2. All this, as said before, to lower the cost of production of the card and to be competitive with Nvidia.

Big Navi RDNA2

What features for Big Navi?

Until now, RedTechGaming provided us with correct information on RDNA2 (he was also the first person to mention the arrival of Radeon VII ). He will be credited with the leaks on the images of the RX6900 card and the information on the Infinity Cache. Moreover, his sources would also have entrusted him with the characteristics of the largest chip, namely Navi 21. This GPU would have 80 CU or 5120 Shaders with 16 GB video memory in GDDR6. Finally, we would have a 256 Bits bus and 128 Mb of cache. The operating frequencies would be equal to or better than the PS5, and all this would be contained in a 250W PDT. Although one has to be very careful, other sources indicate that Big Navi would be competitive with the RTX 3080. AMD being used to cold showers regarding the performance of their boards, we will wait until we have more balls to ignite.

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Edited by Calliers

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